Tag Archives: harm

Antidepressant use during pregnancy doesn’t harm child development, study says



CNN
 — 

Expectant mothers taking many common antidepressants need no longer worry the medication may harm their child’s future behavioral or cognitive neurodevelopment, a new study found.

Antidepressant use during pregnancy was not associated with autism, attention-deficit hyperactivity disorder (ADHD), behavioral disorders, developmental speech, language, learning and coordination disorders or intellectual disabilities, according to a study of over 145,000 women and their children across the United States followed for up to 14 years. The study was published Monday in the journal JAMA Internal Medicine.

“This is truly an important paper. Women and health professionals are often concerned about antidepressants in pregnancy, and sometimes decide to suddenly stop these medications as soon as pregnancy becomes known,” said Carmine Pariante, professor of biological psychiatry at the Institute of Psychiatry, Psychology and Neuroscience at King’s College London, in a statement.

Instead, women with depression and other mental conditions for which antidepressants are prescribed should be told the risk in pregnancy “is not as high as previously thought,” said Pariante, who was not involved in the study.

“I am grateful for this study,” Dr. Tiffany Moore Simas, a member of the Committee on Clinical Practice Guidelines on Obstetrics for the American College of Obstetricians and Gynecologists, told CNN via email.

“One in 5 perinatal individuals will experience a mental health condition,” said Moore Simas, who was not involved in the study. “We must stop shaming them for doing what is needed to care for themselves. Healthy babies need healthy mothers.”

Numerous studies over the decades have found associations between antidepressant use during pregnancy and developmental concerns in children, predominately autism and ADHD. But newer research has called the quality of that prior research into question. Many older studies were observational in nature and often failed to control for contributing factors such as obesity and other health conditions, environmental toxins, inflammation and even maternal stress.

Older research also failed to consider the impact on a developing fetus carried by a mother with uncontrolled depression, anxiety or another psychiatric disorder. Not treating a mother’s mental disorder has also been linked to “stillbirth, preterm birth, growth restriction and birthweight weight issues, impaired bonding, adverse neurodevelopmental outcomes, and increased risk of offspring mental health,” Moore Simas said.

Depressed women can also miss prenatal visits, skip meals, overuse alcohol or cigarettes, and in general fail to care for their growing fetus as they fail to care for themselves, experts say.

A very small number of antidepressants have been linked to an increased risk of birth defects, according to the US Centers for Disease Control and Prevention, so pregnant women should discuss their medication with their doctors.

Despite the advance of knowledge showing little to any impact from most common antidepressants, many physicians and mothers-to-be are still wary of their use, Moore Simas said.

Consultations between pregnant people and their doctors regarding antidepressant use are often “framed in the context of the risk of the medications – despite the data overall being reassuring,” she said. “Conversations about medication use for mental health in pregnancy or otherwise needs to account for the risk of untreated disease.”

The American College of Obstetricians and Gynecologists meets regularly to update guidance on medications that are safe to use during pregnancy, a spokesperson told CNN, and will be reviewing recent research such as this new study.

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Artificial sweeteners can harm sugar levels, shouldn’t be assumed safe – Israeli lab

An Israeli scientist says that artificial sweeteners should no longer be assumed safe, after his lab published peer-reviewed research suggesting they may actually increase sugar levels in the body.

Immunologist Prof. Eran Elinav of the Weizmann Institute of Science told The Times of Israel that unless it is proved that his team’s concerns are unfounded, “we should not assume they are safe.”

According to the study, published in the journal Cell, consuming saccharin and sucralose harms the ability of healthy adults to dispose of glucose in their body.

It is long-awaited human research from the Israeli team that rang alarm bells about artificial sweeteners eight years ago based on a study with rodents.

The scientists argued at the time that sugar substitutes were introduced to satisfy the sweet tooth with less harm to glucose levels but they “may have directly contributed to enhancing the exact epidemic that they themselves were intended to fight.”

Now, they have broadly corroborated their rodent study by monitoring dozens of adults who normally assiduously avoid artificial sweeteners when they consume them.

“Our trial has shown that non-nutritive sweeteners may impair glucose responses by altering our microbiome,” said Elinav.

Illustrative image: intestinal bacteria, which help control intestinal digestion (iStock via Getty Images)

This strongly challenges the common assumption that sweeteners provide a harmless hit of sweetness without any health cost, Elinav added.

The research was led by Dr. Jotham Suez, a former graduate student of Elinav’s and now principal investigator at the John Hopkins University School of Medicine, together with Yotam Cohen, a graduate student in Elinav’s lab, and Weizmann’s Prof. Eran Segal.

The scientists conducted their experiment with the four most common sweeteners: saccharin, sucralose, aspartame, and stevia. The first two appeared to significantly impair glucose response, but all four of them caused changes in the gut bacteria, the microbiome.

An illustration showing glucose levels among trial participants who took different sweeteners, and those who were part of control groups. The control groups are labelled ‘control’ and ‘vehicle.’ (courtesy of the Weizmann Institute of Science)

Elinav stated: “We found that the gut microbe composition and function changes in response to consumption of all four sweetness, meaning that they are not inert to the human body.”

These changes weren’t detected among other volunteers who were in control groups and therefore didn’t consume sweeteners.

Eran Elinav (courtesy of Eran Elinav)

The scientists transplanted feces from some of the people in the experiment into rodents bred to have no gut bacteria of their own. They found that mice with feces from people whose glucose tolerance was hit hardest by sweeteners also had a reduced ability to dispose of glucose.

They say this strengthened their theory that sweeteners are affecting the microbiome, and that the changed microbiome can impact glucose tolerance — so markedly that it has this effect even if transplanted to another species.

“Our current results strongly suggest that artificial sweetness are not inert to the human body or to the gut microbiome, as once thought, and may potentially mediate changes in people, possibly in a highly personalized manner stemming from different people’s unique gut microbe populations,” said Elinav.

“In my opinion as a physician, once it has been noted that non-nutritive sweeteners are not inert to the human body, the burden of proof of demonstrating or refuting their potential impacts on human health is at the responsibility of those promoting their use, and we should not assume they are safe until proven otherwise. Until then, caution is advised,” he said.

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Brad Pitt accuses Angelina Jolie of seeking to ‘inflict harm’ on him over vineyard | Film

Brad Pitt has claimed that former wife Angelina Jolie deliberately “sought to inflict harm on” him by selling her share of their wine company to a rival investor.

First reported by DailyMail.com, Pitt has filed legal papers with Los Angeles County Superior Court as part of a long-running legal dispute between the pair over Chateau Miraval, located in south-east France, which the pair acquired in 2008 before their marriage in 2014.

After the couple divorced in 2019, Jolie was cleared to sell her share in 2021 for $164m (£131.2m) before their wider financial settlement was finalised. However, Pitt started legal action to try to retain a majority share in the company that owns the estate.

Pitt says that Jolie is selling her share to Tenute del Mondo, a wine-making company “indirectly owned and controlled by Yuri Shefler, the Russian billionaire who controls the Stoli Group” and which is “bent on taking control of Miraval”.

The legal document adds: “Jolie pursued and then consummated the purported sale in secret, purposely keeping Pitt in the dark, and knowingly violating Pitt’s contractual rights.”

The Guardian has contacted Jolie’s representatives for a response.

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Brad Pitt Claims Angelina Jolie Tried to ‘Harm’ His Wine Company by Selling Out to a Disreputable ‘Stranger’

Brad Pitt says ex-wife Angelina Jolie deliberately damaged their wine company by selling her half to a “stranger” with a bad reputation – something the couple had explicitly and mutually agreed not to ever do, according to a new court filing.

Pitt’s team claimed in the Friday filing with the Superior Court of California that Jolie’s divestment strategy was designed “to inflict harm on Pitt. Jolie knew and intended that [businessman Yuri] Shefler and his affiliates would try to control the business Pitt had built and undermine Pitt’s investment in Miraval.”

Also Read:
How Much Is Brad Pitt Actually in ‘The Lost City?’

Pitt says the things Shefler has done since taking over Jolie’s portion of the business are going exactly according to her plan, “and just as Jolie envisioned that is exactly what Shefler has done,” said Pitt’s attorneys.

.”Shefler has launched a hostile takeover of the wine business, destabilizing Miraval’s operations and seeking access to Miraval’s confidential and proprietary information for the benefit of his competing enterprise,” the court filing states.

Pitt is suing his ex-wife after the couple’s divorce and

Jolie’s sale of her portion of Château Miraval, located in the Southern French village of Correns, sparked the civil lawsuit. Pitt is suing for breach of contract; dealing in bad faith; and interference with contractual and business relations, among other things.

Pitt is seeking a trial by jury. As well as seeking damages “in an amount to be proven at trial,” and the purported sale made by Jolie, which he wants to be declared “null and void.”

Pamela Chelin contributed to this report.

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Putin warns Finland NATO membership would harm relations

HELSINKI (AP) — Russian President Vladimir Putin warned his Finnish counterpart Saturday relations between the two neighbors could be “negatively affected” if Finland follows through with plans to apply for NATO membership.

The Kremlin’s press service said in a statement that Putin told Sauli Niinisto that Finland’s abandonment “of its traditional policy of military neutrality would be an error since there are no threats to Finland’s security.”

“Such a change in the country’s foreign policy could negatively affect Russian-Finnish relations, which had been built in the spirit of good neighborliness and partnership for many years, and were mutually beneficial,” the statement added.

The response came after Niinisto told Putin in a phone conversation that the militarily non-aligned Nordic country that has a complex history with its huge eastern neighbor “will decide to apply for NATO membership in the coming days”.

Niinisto’s office said in a statement that the Finnish head of state told Putin how starkly Finland’s security environment had changed after Moscow’s Feb. 24 invasion on Ukraine, and pointed to Russia’s demands on Finland refraining from seeking membership to the 30 member-state Western military alliance.

“The discussion (with Putin) was straightforward and unambiguous and was held without exaggeration. Avoiding tensions was considered important,” said Niinisto, Finland’s president since 2012 and one of a handful of Western leaders who has been in regular dialogue with Putin over the past decade.

Niinisto pointed out that he had already told Putin at their first meeting in 2012 that “each independent nation would maximize its own security.”

“That is still the case. By joining NATO, Finland will strengthen its own security and assume its responsibilities. It is not something away from anybody,” Niinisto said.

Niinisto stressed that Finland, despite its likely future membership in NATO, wants to continue to deal with Russia bilaterally in “practical issues generated by the border neighborhood” and hopes to engage with Moscow “in a professional manner”.

According to the Kremlin statement, the two leaders also discussed Russia’s military operation in Ukraine, and the possibility of achieving a political solution to the situation. Putin said negotiations between Moscow and Kyiv had been suspended due to Ukraine’s “lack of interest in a serious and constructive dialogue.”

The phone call was conducted on Finland’s initiative, Niinisto’s office said.

Finland shares a 1,340-kilometer (830-mile) border with Russia, the longest by any European Union member.

Niinisto and Finnish Prime Minister Sanna Marin on Thursday jointly endorsed Finland’s NATO bid and recommended that the country “must apply for NATO membership without delay” to guarantee the nation’s security amid Russia’s military maneuvers in Ukraine and Europe’s changed geopolitical and security landscape.

A formal announcement from Niinisto and Marin of Finland’s intention to apply for NATO membership is expected on Sunday. Marin’s governing Social Democratic Party approved the membership bid on Saturday, paving way for a parliamentary vote next week to endorse the move. It’s expected to pass with overwhelming support. A formal membership application would then be submitted to NATO headquarters in Brussels.

Neighboring Sweden is set to decide on its NATO stance on Sunday in a meeting of the governing Social Democratic Party led by Prime Minister Magdalena Andersson.

U.S. President Joe Biden held a joint call Friday with both Niinisto and Andersson where, according to a White House statement, he “underscored his support for NATO’s Open Door policy and for the right of Finland and Sweden to decide their own future, foreign policy and security arrangements.”

___

Follow AP’s coverage of the Ukraine war at https://apnews.com/hub/russia-ukraine

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UC Berkeley threat: Shelter-in-place order lifted on Cal campus after person threatens to ‘harm’ individuals

BERKELEY, Calif. (KGO) — A shelter-in-place order has been lifted by Berkeley police after a person threatened to “harm” individuals on Cal’s campus prompting a massive search for the suspect on Thursday, according to authorities.

Police say buildings will remain locked and everyone is being asked to safely leave campus for the remainder of the day. In-person classes remain canceled for Thursday.

UC Berkeley officials sent an email explaining that the lockdown was due to an emerging active shooter threat related to a student who had been placed on interim suspension for threatening behavior.

UC Berkeley police clarified in a tweet, “There is NOT an active shooter on campus. Police are actively looking for a person who may want to harm specific individuals. Please continue to shelter in place at this time.”

A UC Berkeley spokesperson said, “For the time being, all I can say is that there is a police investigation into a possible threat and that everyone on campus has been asked to shelter in place. In addition, those not on campus are being urged to stay away.”

A warning message informed students that all campus services such as libraries, dining and parking garages are closed until further notice, and in-person classes are canceled through the remainder of the day.

Some neighboring schools also closed their gates.

Berkeley Unified School District said it had placed six schools on a “soft lockdown” out of an abundance of caution, because of their proximity to the college campus. A soft lockdown means that all gates and doors to a school are locked but students can move around freely inside school buildings, said Trish McDermott, spokeswoman for Berkeley Unified.

A class of second graders on a field trip to the university campus when the lockdown was issued were sheltering in place, McDermott said.

“They are safe and fine and we’ve reached out to parents and caregivers,” she said.

Stay with ABC7 News for updates on this developing story.
The Associated Press contributed to this report.

If you’re on the ABC7 News app, click here to watch live

Copyright © 2022 KGO-TV. All Rights Reserved.



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UC Berkeley threat: Shelter-in-place on Cal campus due to person ‘who may want to harm’ individuals, no active shooter — LIVE

BERKELEY, Calif. (KGO) — A shelter-in-place has been ordered by Berkeley police due to a threat on the UC Berkeley campus, officials tweeted Thursday.

UC Berkeley officials sent an email explaining that it was due to an emerging active shooter threat related to a student who had been placed on interim suspension for threatening behavior.

UC Berkeley police clarified in a tweet, “There is NOT an active shooter on campus. Police are actively looking for a person who may want to harm specific individuals. Please continue to shelter in place at this time.”

A UC Berkeley spokesperson said, “For the time being, all I can say is that there is a police investigation into a possible threat and that everyone on campus has been asked to shelter in place. In addition, those not on campus are being urged to stay away.”
Police told people on campus to go inside and move away from doors and windows.

They say emergency officials are responding to the scene. Police say the incident is limited to the campus area, particularly the southern portion.

A warning message informed students that all campus services such as libraries, dining and parking garages are closed until further notice, and in-person classes are canceled through the remainder of the day.

Some neighboring schools also closed their gates.

Berkeley Unified School District said it had placed six schools on a “soft lockdown” out of an abundance of caution, because of their proximity to the college campus. A soft lockdown means that all gates and doors to a school are locked but students can move around freely inside school buildings, said Trish McDermott, spokeswoman for Berkeley Unified.

A class of second graders on a field trip to the university campus when the lockdown was issued were sheltering in place, McDermott said.

“They are safe and fine and we’ve reached out to parents and caregivers,” she said.

Stay with ABC7 News for updates on this developing story.

The Associated Press contributed to this report.

If you’re on the ABC7 News app, click here to watch live

Copyright © 2022 KGO-TV. All Rights Reserved.



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3 orthopaedic surgeries that might be doing patients (and their pockets) more harm than good

Orthopaedic surgery (surgery for problems related to bones, joints, tendons and ligaments) is the third most common reason Australians go under the knife.

Last year, more than 100,000 orthopaedic surgeries were performed in Australian public hospitals. As most orthopaedic surgeries are performed in private hospitals, the real number is much higher (and unfortunately unknown).

But what most people don’t know is that many common orthopaedic surgeries are not better for reducing pain than non-surgical alternatives that are both cheaper and safer, such as exercise programs. Some surgeries provide the same result as a placebo surgery, where the surgeon only conducts a joint examination, rather than performing the real surgery.

And contrary to popular opinions, placebos are not actually very powerful, so real surgery that isn’t better than a placebo should not be recommended.

In this article we discuss the evidence behind three commonly performed orthopaedic surgeries for back, knee and shoulder pain that might be doing patients (and their pockets) more harm than good.




Read more:
Antibiotics for colds, x-rays for bronchitis, internal exams with pap tests – the latest list of tests to question


Spinal fusion for back pain

Spinal fusion is the riskiest type of surgery for back pain and the most expensive orthopaedic procedure performed in Australia. Depending on your health insurance arrangements, the total cost of the surgery can be around A$58,000 and out-of-pocket costs might be close to A$10,000.

It involves permanently fusing two or more vertebrae together to stop them moving on each other, typically using metal implants and bone from other areas of the body.

It was originally conceived to treat broken spinal bones and some spine deformities, such as severe scoliosis (abnormal curvature of the spine). Surgeons’ justification for using this surgery has expanded over time and it is now the most common surgery to treat everyday back pain that isn’t caused by a serious issue like a fracture or infection.

This is despite evidence that spinal fusion is not more effective than non-surgical treatments (such as an exercise program) and often results in complications. About one in six patients experience a serious complication, such as an infection, blood clot, nerve injury, or heart failure. In New South Wales, only one in five workers who have spinal fusion return to work after two years and one in five have another spine surgery within two years.

Spinal fusion is not more effective than non-surgical treatments like exercise programs, and often results in complications.
Shutterstock



Read more:
The coronavirus ban on elective surgeries might show us many people can avoid going under the knife


Arthroscopy for knee and shoulder pain

Arthroscopy is a type of keyhole surgery commonly used to treat knee osteoarthritis and shoulder pain. The surgery is used to remove or repair damaged pieces of bone or cartilage that are thought to cause pain.

Thousands of knee arthroscopies are performed every year. In 2013, more than 33,000 knee arthroscopies were performed in Australian hospitals. Since then, this number has reduced by around 40%.

Australian data shows the number of shoulder arthroscopies increased nearly 50% from 2000 to 2009. Since then, numbers have remained stable, at about 6,500 surgeries per year from 2009 until 2021.

The cost of these surgeries is substantial. Typical out-of-pocket costs for patients with private health insurance is A$400 and A$500 for knee and shoulder arthroscopy, respectively. Sometimes, out-of-pocket costs can be as high as A$1,900 to A$2,400, respectively.

High-quality research shows arthroscopy to treat osteoarthritis, wear and tear of the meniscus in the knee, and to remove inflamed and thickened bone and tissue in the shoulder is no better than placebo surgery.

Even though these surgeries are minimally invasive, they still result in substantial inconveniences. For example, it may take up to six weeks after shoulder arthroscopy for patients to perform simple daily activities like reaching above the head or driving, and up to three months to return to heavy work or sport.

Knee and shoulder arthroscopies for common complaints have been found to be no more effective than placebo – which is to say – not very effective.
Shutterstock



Read more:
Surgery rates are rising in over-85s but the decision to operate isn’t always easy


So what are the alternatives?

Knowing what treatment options are available to you, and their benefits, harms, and costs is important to ensure you make the best choice for yourself. Luckily, there are tools available to help you. We’ve developed decision aids to help people with shoulder pain decide whether to have surgery or not (the tool is available here).

Our research has shown that people with back pain who seek a second opinion can avoid unnecessary spine surgery, including spinal fusion.

And avoid Dr Google. Information on the internet usually oversells the benefits and downplays the harms of common surgeries such as spinal fusion, shoulder arthroscopy, and surgery for a torn ACL (ligament in the knee). You will find misleading information even on websites from trustworthy sources such as government and university websites.

Before making a decision, make sure you ask your doctor the following questions:

  1. am I more likely to get better with surgery than without it?

  2. what happens if I choose not to have surgery?

  3. what are the risks of having this surgery? Both during surgery (for example, anaesthesia) and after surgery (for example, complications)

  4. have I received enough information about the benefits and harms of having surgery compared to other treatments (including doing nothing)?

Sometimes surgery is recommended because non-surgical treatment has not worked. Unfortunately, the failure of non-surgical treatment does not make the ineffective surgery any more effective. It still doesn’t work any more than not operating.

The available evidence tells us that the risks and inconveniences of the three surgeries discussed here do not outweigh the potential benefits.

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Sleeping with even a small amount of light may harm your health, study says

A new study shows sleeping with a dim light raised the blood sugar and heart rate of healthy young people. (l i g h t p o e t, Shutterstock)

Estimated read time: 4-5 minutes

ATLANTA — Sleeping for only one night with a dim light, such as a TV set with the sound off, raised the blood sugar and heart rate of healthy young people participating in a sleep lab experiment, a new study found.

The dim light entered the eyelids and disrupted sleep despite the fact that participants slept with their eyes closed, said study author Dr. Phyllis Zee, director of the Center for Circadian and Sleep Medicine at Northwestern University Feinberg School of Medicine.

Heart rate typically drops at night, slowing down as the the brain is busy repairing and rejuvenating the body. An elevated heart rate at night has been shown in numerous studies to be a risk factor for future heart disease and early death.

High blood sugar levels are a sign of insulin resistance, where the body stops using glucose properly and the pancreas goes into overdrive, flooding the body with extra insulin to overcompensate until it eventually loses its ability to do so. Over time, insulin resistance can ultimately lead to Type 2 diabetes.

Sleeping with eyes closed

Prior research has shown an association between artificial light at night and weight gain and obesity, disruptions in metabolic function, insulin secretion and the development of diabetes, and cardiovascular risk factors.

“Why would sleeping with your lights on affect your metabolism? Could that explain why there is a higher prevalence of diabetes or obesity (in society)?” Zee asked.

Zee and her team took 20 healthy people in their 20s and had them spend two nights in a sleep lab. The first night was spent in a darkened room where “you wouldn’t be able to see much, if anything, when your eyes were open,” Zee said.

All of the study participants were connected to devices monitoring a number of objective measures of sleep quality. So data could be gathered with minimal interference, they slept with an IV with long tubes that snake across the room and through a hole to the researcher’s side of the lab. The blood was drawn without ever touching the slumbering participants.

“We recorded the brainwaves and could tell what sleep stage the person was in,” Zee said. “We recorded their breathing, their heart rate, their EKG, and we also drew blood from them to measure melatonin levels while they were sleeping.” Melatonin is a hormone that regulates the body’s circadian rhythm, or sleep and wake body clock.

A randomized portion of the group repeated that same light level for a second night in the lab, while another group slept with a dim overhead light with a glow roughly equivalent to “a very, very dark, cloudy day or street lights coming in through a window,” Zee said.

“Now these people were asleep with their eyelids closed,” she explained. “In the literature the estimation is that about 5% to 10% of the light in the environment would actually get through the closed lid to the eye, so this is really not a lot of light.”

Yet even that tiny amount of light created a deficit of slow wave and rapid eye movement sleep, the stages of slumber in which most cellular renewal occurs, Zee said.

In addition, heart rate was higher, insulin resistance rose, and the sympathetic (fight or flight) and parasympathetic (rest and relax) nervous systems were unbalanced, which has been linked to higher blood pressure in healthy people.

The light was not bright enough, however, to lower levels of melatonin in the body, Zee added. The study was published Monday in the journal of the Proceedings of the National Academy of Sciences.

What to do?

What advice would Zee give people based on her study and existing research in the field? Close your blinds and curtains, turn off all the lights, and consider using a sleep mask.

“I think the strength of the evidence is that you should clearly pay attention to the light in your bedroom,” she said. “Make sure that you start dimming your lights at least an hour or two before you go to bed to prepare your environment for sleep.”


You should clearly pay attention to the light in your bedroom. Make sure that you start dimming your lights at least an hour or two before you go to bed to prepare your environment for sleep.

–Dr. Phyllis Zee, study author


Check your bedroom for sources of light that are not necessary, she added. If a night light is needed, keep it dim and at floor level, “so that it’s more reflected rather than right next to your eye or bed level,” she suggested.

Also be aware of the type of light you have in your bedroom, she added, and ban any lights in the blue spectrum, such as those emitted by electronic devices like televisions, smartphones, tablets and laptops.

“Blue light is the most stimulating type of light,” Zee said. “If you have to have a light on for safety reasons change the color. You want to choose lights that have more reddish or brownish tones.”

LED lights can be purchased in any color, including red and brownish tones.

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Sleeping with even a small amount of light may harm your health, study says

The dim light entered the eyelids and disrupted sleep despite the fact that participants slept with their eyes closed, said study author Dr. Phyllis Zee, director of the Center for Circadian and Sleep Medicine at Northwestern University Feinberg School of Medicine.

Heart rate typically drops at night, slowing down as the the brain is busy repairing and rejuvenating the body. An elevated heart rate at night has been shown in numerous studies to be a risk factor for future heart disease and early death.

High blood sugar levels are a sign of insulin resistance, where the body stops using glucose properly and the pancreas goes into overdrive, flooding the body with extra insulin to overcompensate until it eventually loses its ability to do so. Over time, insulin resistance can ultimately lead to Type 2 diabetes.

Prior research has shown an association between artificial light at night and weight gain and obesity, disruptions in metabolic function, insulin secretion and the development of diabetes, and cardiovascular risk factors.

“Why would sleeping with your lights on affect your metabolism? Could that explain why there is a higher prevalence of diabetes or obesity (in society)?” Zee asked.

Zee and her team took 20 healthy people in their 20s and had them spend two nights in a sleep lab. The first night was spent in a darkened room where “you wouldn’t be able to see much, if anything, when your eyes were open,” Zee said.

All of the study participants were connected to devices monitoring a number of objective measures of sleep quality. So data could be gathered with minimal interference, they slept with an IV with long tubes that snake across the room and through a hole to the researcher’s side of the lab. The blood was drawn without ever touching the slumbering participants.

“We recorded the brainwaves and could tell what sleep stage the person was in,” Zee said. “We recorded their breathing, their heart rate, their EKG, and we also drew blood from them to measure melatonin levels while they were sleeping.” Melatonin is a hormone that regulates the body’s circadian rhythm, or sleep and wake body clock.

A randomized portion of the group repeated that same light level for a second night in the lab, while another group slept with a dim overhead light with a glow roughly equivalent to “a very, very dark, cloudy day or street lights coming in through a window,” Zee said.

“Now these people were asleep with their eyelids closed,” she explained. “In the literature the estimation is that about 5% to 10% of the light in the environment would actually get through the closed lid to the eye, so this is really not a lot of light.”

Yet even that tiny amount of light created a deficit of slow wave and rapid eye movement sleep, the stages of slumber in which most cellular renewal occurs, Zee said.

In addition, heart rate was higher, insulin resistance rose, and the sympathetic (fight or flight) and parasympathetic (rest and relax) nervous systems were unbalanced, which has been linked to higher blood pressure in healthy people.
The light was not bright enough, however, to lower levels of melatonin in the body, Zee added. The study was published Monday in the journal of the Proceedings of the National Academy of Sciences.

What to do?

What advice would Zee give people based on her study and existing research in the field? Close your blinds and curtains, turn off all the lights, and consider using a sleep mask.

“I think the strength of the evidence is that you should clearly pay attention to the light in your bedroom,” she said. “Make sure that you start dimming your lights at least an hour or two before you go to bed to prepare your environment for sleep.”

Check your bedroom for sources of light that are not necessary, she added. If a night light is needed, keep it dim and at floor level, “so that it’s more reflected rather than right next to your eye or bed level,” she suggested.

Also be aware of the type of light you have in your bedroom, she added, and ban any lights in the blue spectrum, such as those emitted by electronic devices like televisions, smartphones, tablets and laptops.

“Blue light is the most stimulating type of light,” Zee said. “If you have to have a light on for safety reasons change the color. You want to choose lights that have more reddish or brownish tones.”

LED lights can be purchased in any color, including red and brownish tones.

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