Your coffee has a longer tail than you think: caffeine and sleep
Caffeine six hours before bed can still cost you an hour of sleep. What the research found, why the effect lasts so long, and how to find your own cutoff.
Biokei Labs
Notes on circadian health
What the research actually says about sunlight, sleep, fasting and grounding — including where it is thin.
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Does when you eat matter? Intermittent fasting and your body clock
An honest guide to intermittent fasting and your circadian rhythm — what the trials really found (including the nulls), why timing matters less than you would think, and the one habit that holds up.
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Does grounding actually work? An honest look at the evidence
Grounding (earthing) is everywhere — but does it work? An honest, hedged look at what the research actually measures, what it does not, and how to test it on yourself.
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Morning light: the simplest habit for better sleep and energy
Ten minutes of morning light sets your body clock for the whole day — better sleep that night, steadier energy, brighter mood. Here is the science, and how to make it stick.
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How much sun do you actually need for vitamin D?
Less than you think — and it saturates. A clear, honest look at how much sunlight makes vitamin D, why short midday doses are most efficient, and why more never means better.
