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”
Uva exposure
UVA light helps support dopamine, serotonin, and thyroid hormone production.
Strong consensusFor natural ways to increase dopamine.
The strongest voice
“UVA light can lower blood pressure on its own... UVA exposure to the skin mobilizes nitric oxide from storage pools in the dermis.”
In their own words
One faithful sentence per source, linked to the moment it was said; quiet chips mark where money is involved.
a molecular biology PhD conditional
“Some mitochondrial diseases may improve with more UVA and sunrise light exposure, which is limited at high latitudes.”
a molecular biology PhD · source video · 00:22:00
a board-certified cardiologist recommend
“UVA light hitting the skin induces nitric oxide release from blood vessels, which helps dilate arteries.”
a board-certified cardiologist · source video · 00:36:00
an optometrist of twenty years recommend
“Morning UVA exposure is needed for many health reasons.”
an optometrist of twenty years · Instagram reel
an optometrist of twenty years recommend
“Morning UVA triggers a cascade of hormones and neurotransmitters beneficial for health.”
an optometrist of twenty years · 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.”