How scientists are shining light on the biology behind seasonal affective disorder
Seasonal affective disorder arises from endogenous, physiological seasonal changes in mood driven primarily by reduced daylight and circadian disruption, causing lethargy, oversleeping and carbohydrate cravings.
It sounds like witchcraft': can light therapy really give you better skin, cleaner teeth, stronger joints?
Light therapy uses specific wavelengths—especially red and infrared—with some proven benefits from sunlight but mixed and frequency-dependent evidence for many commercial devices.
Audio long read: How to get the best night's sleep - what the science says
Understanding the body's network of biological clocks, not quick hacks or gadgets, offers the most promising path to reliably improving sleep and tailoring treatments.
Feeling the Fall Funk? It Might Be More Than Just the Weather
Shorter fall days disrupt circadian rhythms, increase melatonin, lower vitamin D, and cause fatigue and mood changes mitigated by light therapy and vitamin D.