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Your body runs on a 24-hour clock anchored by light, temperature, food timing, and behavior. When the clock is aligned, everything works better. When it drifts, sleep is the first thing to break.
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Some people wake at dawn sharp and fade by evening; others come alive at night. That is your chronotype — lark or owl — and it is largely wired in. Take the free questionnaire to find yours, and learn how to work with it instead of against it.
Melatonin gets two opposite reputations: harmless candy, or a dependency risk you should fear. The truth is more useful than either. Here's what the research actually says about safety, why most people take it wrong, and the better move most nights.
Clear blue light glasses and amber blue light glasses are marketed as the same thing. For sleep, they are not even close. The tint is not cosmetic — it is the measurement of how much melatonin-suppressing light the lens actually blocks. Here is the difference, with numbers.
A wrecked sleep schedule is a circadian-timing problem, and you fix it with the levers that set the clock — light, wake time, and meals — in the right order. Here is the reset that works, why the anchor is your wake time not your bedtime, and how to keep it from sliding back.
Ten minutes of outdoor light within an hour of waking is the single most underrated sleep intervention. Here is the circadian biology — and the protocol — that actually works.
The honest answer is: it depends entirely on which lens you bought. Daytime computer-strain glasses do almost nothing for sleep. Amber lenses worn 2-3 hours before bed have real, replicated melatonin-protection effects.
Eating early and stopping early aligns the gut clock with the brain clock. The sleep benefits are larger than most fasting advocates realize.
The single best jet lag protocol uses light timing, fasting, and one specific bedtime trick. Most over-the-counter "jet lag pills" are theater.
Blue light glasses are everywhere. The research is more nuanced than the marketing. Here is what actually moves the needle.