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Study shows first proof that a safer UV light effectively kills virus causing COVID-19
Study shows first proof that a safer UV light effectively kills virus causing COVID-19
https://ift.tt/2ZNl3vo September 18, 2020 at 11:05PM https://ift.tt/1R552o9
C.D.C. Testing Guidance Was Published Against Scientists’ Objections A controversial guideline saying people without Covid-19 symptoms didn’t need to get tested for the virus came from H.H.S. officials and skipped the C.D.C.’s scientific review process.
C.D.C. Testing Guidance Was Published Against Scientists’ Objections A controversial guideline saying people without Covid-19 symptoms didn’t need to get tested for the virus came from H.H.S. officials and skipped the C.D.C.’s scientific review process.
https://ift.tt/33IsXHA September 18, 2020 at 11:55PM https://ift.tt/1R552o9
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Weekly Link Love — Edition 99
Research of the Week
Researchers are exploring the “entities” people meet on DMT.
Hominids were cooking food in hydrothermal vents millions of years ago.
Plastic-degrading bacteria are rapidly evolving in the ocean.
Probiotics help obese children lose weight.
New Primal Blueprint Podcasts
Episode 446: Brad Kearns: Host Elle Russ welcomes Brad Kearns to the podcast.
Episode 447: Dr. Robert Silverman: Host Brad Kearns welcomes Dr. Robert Silverman to discuss COVID-19 and gut health.
Primal Health Coach Radio Episode 76: Laura and Erin chat with Tim Davis about breaking stigmas and beating addiction for good.
Media, Schmedia
Great layman’s overview of how sustainable ranching can work, be profitable, and produce tons of meat.
How livestock can prevent wildfires.
Interesting Blog Posts
Social Notes
Everything Else
Vitamin D is going mainstream. Love to see it.
Things I’m Up to and Interested In
Incredible study: Just one dose of wild blueberries improves cognitive performance in middle aged adults.
More evidence of our reawakening drive to roam and be nomadic: Hyundai gets into the RV game.
Imagine that: Class is more effective when it’s outdoors in a green space.
Important avenue of research: Potential ethnic differences in susceptibility to COVID-19.
Nice concept everyone can get behind: Megafauna nationalism.
Question I’m Asking
How’s school going for your kids?
Recipe Corner
- Buffalo cauliflower, never would have thought of it.
- Chinese sesame chicken, paleo-style.
Time Capsule
One year ago (Sep 12 – Sep 18)
- Fitness Advice From A Primal Elder to Younger Groks: What to Focus On and What to Let Go Of – What’s important, what’s worth it.
- Dear Mark: Psyllium, Hex Bar Deadlifts, Getting Strong vs Getting Big, Isometrics – Answering questions about all of this stuff.
Comment of the Week
“This is in response to Mark’s ‘Sunday with Sisson’ email about the beach.
I live in the Malibu area, and hiked the 75+ mile Backbone Trail with Santa Monica Mountains Trails Council. During the week-long hike, members of the organization gives talks about the local history and geography. This might also be mentioned in MDA blog, but I learned that there is a ‘kelp highway’ and humans may have followed it from Russia over the Bering Strait and down the Pacific Coast. The idea is that the kelp creates a steady environment for fish, so it’s an easy trail for people to follow.
I recall Mark has discussed how we process fish very well, and that a steady supply would create the conditions necessary to support the development of our big brains. I suspect that we are built to feel ‘at home’ and thus at peace in our niche near bodies of water.”
-Fascinating thought, Monica.
The post Weekly Link Love — Edition 99 appeared first on Mark's Daily Apple.
Over-Sanitizing: The Health Effects of Cleaning Chemical Exposure
Many of the cleaning products we use indoors can pose significant risks to our health. Find out more about over-sanitizing and about safer (and effective) alternatives.
The post Over-Sanitizing: The Health Effects of Cleaning Chemical Exposure appeared first on Chris Kresser.
Shorter dream-stage sleep may be related to earlier death
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Time and time again, adequate sleep has been shown to be critical to daily functioning and long-term health. Sleep serves numerous roles: recovering energy for the brain, clearing waste products, and forming memories. Prior studies have clearly linked shortened sleep times to heart disease, obesity, reduced cognitive performance, worsened mood, and even a shorter life. There is now new research that suggests that lack of a certain type of sleep (the dream stage of sleep) may be related to an earlier death in middle-aged and older people.
What is REM sleep?
Normal sleep is broken down into two sleep types: rapid eye movement (REM) and non-rapid eye movement (NREM). NREM is further classified by depth of sleep; N1 and N2 are lighter sleep stages, and N3 is deep sleep, which is most restorative. (REM is the stage where vivid dreaming occurs.) Brainwave activity during this time appears similar to the brain’s activity while awake. REM periods generally occur every 90 minutes, and are longest during the second half of the night. REM sleep normally makes up 20% to 25% of sleep time.
How does sleep change with age?
Sleep time and sleep stages naturally change as we age. Total sleep time decreases by 10 minutes every decade until age 60, when it stops decreasing. Time in N3 sleep, the deepest sleep stage, also shortens with age; time in N1 and N2 tends to increase. As a result, people wake more easily from sleep as they age. The percentage of REM sleep also naturally decreases; thus, reduced time spent in REM may be a marker of aging.
The circadian rhythm is a 24-hour internal clock that governs numerous body functions including body temperature, release of hormones, and sleep time. The internal clock “advances” with age, so older adults tend to fall asleep earlier and wake earlier. Adapting to jet lag and shift work becomes more difficult. Daytime napping also increases as the strength of the circadian rhythm and the drive to sleep at night decrease.
Studies have also shown that older adults who are healthy may not perceive problems with sleep when it is actually impaired, or may assume that certain disruptions are part of aging when they have treatable conditions.
Why would less sleep increase my risk of death?
In the short term, sleep deprivation increases cortisol levels, causes increased blood pressure, decreases glucose tolerance, and increases the activity of the body’s fight-or-flight system, all of which are linked to increased risk of diabetes, heart attacks, and strokes. Daytime cognitive performance is also reduced, resulting in more accidents. Twenty-four hours of sustained wakefulness impairs driving ability to the same degree as a blood alcohol concentration of 0.10%, which is above the legal limit.
In the long term, both short and long sleep (less than five hours or more than nine hours) have been associated with earlier death. People who sleep less than four hours dramatically increase their risk of dying early, possibly through heart disease, diabetes, high blood pressure, chronic stress, lower immunity, and overall more rapid aging.
Less dream-stage sleep makes a difference
We know that short sleep is associated with increased mortality, but until now it has been unclear if shorter sleep in a particular sleep stage makes a difference in the health risks associated with sleep deprivation. A new study published in JAMA Neurology looked at the relationship between REM sleep and earlier death in two large study groups, one consisting of 2,675 older men and the other of 1,386 middle-aged men and women. They followed both groups over time and looked at the relationship between sleep stages and causes of death.
Both groups showed increased mortality rates related to a decrease in REM sleep, with a 13% higher mortality rate for every 5% reduction in REM sleep. REM sleep was the most important sleep stage for predicting survival.
Putting new research into context: What does this mean for me?
This study showed an association between reduced REM and increased mortality, but it did not demonstrate the cause of the association. REM deprivation could independently contribute to the development of numerous other diseases. The results apply more clearly to older adults, given that the age groups studied averaged in the 50s and 70s. Short REM may also be a marker of a sick or aging brain; less REM sleep has already been tied to a greater risk of dementia. Overall, ensuring adequate REM sleep is important to protecting your long-term health.
Getting better sleep in middle age and beyond
Maintaining good sleep should remain a priority throughout your life. Everyone can make healthy choices to maximize restorative sleep. Dr. Suzanne Bertisch has written previously about recommendations for improving sleep hygiene, and even more suggestions are available in the Harvard Health Publishing Special Health Report Improving Sleep: Getting a Good Night’s Rest.
Some fundamental steps to improve your sleep and health include:
- Get at least seven hours of sleep each night. If you still feel tired, sleep a little more; some people need eight or nine hours of sleep to feel rested.
- Keep a consistent bedtime and wake time. This will make falling asleep easier, and will keep your circadian rhythm aligned with your sleep and wake time.
- Try to sleep when your body naturally wants to fall asleep and wake up. This can differ from sleep and wake times required for work schedules, which also has negative consequences. A sleep doctor can help you realign your circadian clock with your schedule.
- Depression or other mood disorders can cause disrupted sleep. Talk to your doctor if you are feeling low, no longer enjoy your hobbies, or are struggling with anxiety or sadness.
- If you can’t fall asleep, stay asleep, or feel sleepy all the time, you may need evaluation from a doctor for a sleep disorder such as sleep apnea or insomnia. Treating these disorders can make a major difference in overall sleep quality and health.
The post Shorter dream-stage sleep may be related to earlier death appeared first on Harvard Health Blog.
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