Jun 27, 2026Circadian Biology

Wearable Daylight Exposure and Dementia Risk: What It Means

A UK Biobank study links higher wearable-measured daytime light exposure to lower dementia risk. Learn what the signal means—and what it cannot prove.

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Jun 26, 2026Aging Biomarkers

Can Wearable Activity Rhythms Measure Aging Risk?

Seven days of wrist data can track mortality and dementia risk, but wearable rest-activity rhythms are frailty signals—not validated aging clocks.

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Apr 6, 2026Mental Health

Blue-Light Glasses for Mania: The Best Trial Found No Benefit

Can amber glasses stabilize bipolar mood? A blinded inpatient trial found no benefit for acute mania, despite a plausible circadian mechanism.

bipolar disorderblue lightamber glassescircadian rhythm

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Apr 6, 2026Mental Health

Blue Light at Work: Why Color Temperature Misleads

Blue-enriched office light can improve alertness, but color temperature misleads. What mel-EDI research says about focus, sleep, and timing.

blue lightmelanopsincircadian rhythmalertness

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Apr 6, 2026Sleep

Blue-Light Blocking Glasses for Sleep: What Trials Actually Show

Do blue-light blocking glasses improve sleep? Cochrane found very low-certainty evidence, while a healthy-adult trial found no objective benefit from evening lenses.

blue-light glassesmelatonincircadian rhythminsomnia

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Apr 6, 2026Sleep

Morning Light May Matter More Than Blue Blocking Software

Blue-blocking software may improve subjective sleep, but submarine trials show that circadian-informed morning light resets the body clock more quickly.

circadian rhythmblue light exposuremorning lightmelatonin

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Apr 6, 2026Sleep

Shiftwork Fatigue: What Mining Research Still Hasn’t Tested

After 40 years of research, mining fatigue programs still lack controlled trials for naps, caffeine, rosters, and detection tech. What evidence exists?

shift work fatiguebright light exposurecircadian rhythmsleep hygiene

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Mar 30, 2026Circadian Health

Bedtime Aspirin and Blood Pressure: A Plausible Signal, Not Proof

Bedtime aspirin may modestly improve ambulatory blood pressure versus morning dosing, but disputed chronotherapy data and absent outcome trials limit conclusions.

aspirin dosingcircadian rhythmblood pressureraas

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Mar 28, 2026Sleep

Jet Lag for Athletes: Why Eastbound Travel Hits Harder

Travel fatigue and jet lag are different problems for athletes. Learn why eastbound travel can impair performance longer and which countermeasures have evidence.

jet lagcircadian rhythmmelatonintime zones

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Mar 24, 2026Sleep

An 8-Year Sleep Trial Tests Circadian Change’s Staying Power

An 8-year youth RCT found early circadian gains vanished by adulthood. What it says, and cannot say, about lasting sleep interventions.

circadian rhythmchronotherapyadolescent sleepchronotype

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Mar 24, 2026Sleep

Morning Light Therapy for DSWPD: What Trials Show

Morning light therapy for delayed sleep-wake phase disorder is biologically plausible, but five small trials leave dose, timing, and long-term durability unanswered.

light therapycircadian rhythmsleep disordersdlmo

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Mar 22, 2026Sleep

Night Shift Work, Cancer Risk, and What the Evidence Can Prove

Night shift work is an IARC probable carcinogen. Examine the cancer evidence, circadian mechanisms, and the data gaps that still limit policy.

night shift workcircadian rhythmcancer riskbreast cancer

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