Jun 15, 2026Longevity Nutrition

Does L-Theanine Improve Sleep? What Human Trials Show

Can L-theanine improve sleep quality? The best human trials suggest a modest subjective benefit, but objective sleep results remain uncertain.

l-theaninesleep qualitysystematic reviewmeta-analysis

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Mar 22, 2026Sleep

Can Walking While Thinking Improve Deep Sleep? Early Data

A small trial found low-intensity dual-task walking raised NREM delta power in older women. What the result means—and what it cannot prove.

deep sleepnrem delta powerlow-intensity walkingcognitive engagement

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Mar 20, 2026Sleep

Acupuncture for Insomnia: What PSG Sleep Data Really Shows

A PSG-only meta-analysis found acupuncture improved sleep continuity in primary insomnia, but bias, dose, and CBT-I comparison gaps remain.

acupunctureinsomniapolysomnographysleep quality

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Mar 20, 2026Sleep

After TBI, CBT Has the Best Sleep Evidence So Far

A 2026 network meta-analysis found CBT improved three sleep measures after TBI, while drugs showed no advantage over control.

cbt-iinsomniatraumatic brain injurysleep quality

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Mar 18, 2026Sleep

Night-Shift Sleep: Melatonin vs. Evening Bright Light

Night-shift sleep: when melatonin, evening light, and sleep timing may help—and why fast rotations make full circadian adaptation unlikely for workers.

melatonincircadian rhythmshift workbright light therapy

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Mar 18, 2026Sleep

Blue Light, S-Cones, and the Real Limits of Sleep Glasses

Do blue-light glasses miss part of the circadian signal? Human studies put melanopsin first, but the S-cone question and real-world payoff remain unsettled.

blue-light glassesmelanopsincircadian rhythmsleep quality

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Mar 18, 2026Nutrition

Time-Restricted Eating and Sleep: What the Evidence Shows

Can earlier time-restricted eating improve sleep? Reviews of randomized trials find mixed results, while timing and chronotype may matter most.

time-restricted eatingintermittent fastingsleep qualitycircadian rhythm

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Mar 13, 2026Biological Aging

Diet, Exercise, Sleep, and Aging: No Synergy Proof Yet

A UK Biobank study links anti-inflammatory eating, high activity, and healthy sleep with slower biological aging—but does not prove synergy.

biological agephenoageanti-inflammatory dietexercise

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Mar 13, 2026Sleep

HFNC vs. CPAP for Sleep Apnea: What a Small Trial Found

Can high-flow nasal cannula replace CPAP for sleep apnea? A randomized trial found partial AHI control, worse sleep architecture, and major gaps.

obstructive sleep apneacpaphigh-flow nasal cannulaahi

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Mar 8, 2026Mental Health

ADHD Lifestyle Clues: Exercise, Sleep, Light, and Diet

A sham-controlled ADHD trial found lifestyle correlations, not proof. What exercise, sleep, evening light, and diet evidence really supports for children.

adhdsleep qualityphysical activitycircadian rhythm

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Mar 7, 2026Sleep

Exercise for Sleep Apnea May Deepen Sleep, Not Just Cut AHI

Exercise may do more for obstructive sleep apnea than lower AHI. New evidence suggests longer programs can shift sleep toward deeper slow-wave sleep.

osasleep architectureslow-wave sleepcpap

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Feb 25, 2026Nutrition

Sleep + Collagen for Skin Aging: The Science Doesn't Add Up

A study claims sleep enhances oral collagen's skin benefits. We read it: it's two separate literatures duct-taped together and called a meta-analysis.

collagen peptidesskin agingsleep qualitymeta-analysis

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