Natural light exposure
Natural light exposure is essential for healthy circadian rhythms and mood.
Strong consensus“it's really teaching us how critical it is to get outdoors and exposed to light like you are right now”
Artificial light avoidance
Reducing artificial light, especially at night, helps keep your circadian system on track.
Worth exploringFor circadian rhythm and mitochondrial health.
The strongest voice
“If at all possible just turn the lights off right and then step outside periodically with your light breaks to get the brightness right”
In their own words
One faithful sentence per source, linked to the moment it was said; quiet chips mark where money is involved.
a GP with a Master of Public Health recommend
“Natural light exposure in the morning signals the hypothalamus and helps optimize body function”
a GP with a Master of Public Health · source video · 00:00:45
a performance scientist with a psychology PhD against
“Artificial light before bed has a pro-depressive effect and impacts next day motivation.”
a performance scientist with a psychology PhD · Instagram reel
Worth discussing with your GP, especially if you take medication or are pregnant. Entrain describes what is publicly taught; it does not prescribe.
More from light and sun
Outdoor time
Spending time outdoors supports circadian rhythms, resilience, and mental well-being.
Strong consensus“when you spend extended time in the back country, say camping, like under the stars or in a tent, and we're disconnected from technology, I think it takes three three nights, three nights or four nights, and when you come back, your brain has actually reset and it's become a sponge again.”
Incandescent bulb
Incandescent bulbs are a gentle, low-blue light option for home lighting, supporting circadian health.
Strong consensus“Anywho, I buy all my incandescent bulbs from a specialist lighting shop they are the best.”