Sunlight

 Red/infrared and UVA light in the morning during sunrise primes your body for UVB light midday.

Ultraviolet light isn’t harmful, you’ve been lied to. It’s CRUCIAL to health and life altogether, on an evolutionary level.

What IS harmful is that d*mn alien sun screen you stare at all day and night, creating melanopsin-melanocyte dysfunction which makes you more susceptible to burning, and an alien fast food refined food diet.

Latitude and skin type/haplotype plays some role initially, but even Fitzpatrick skin types I and II can eliminate the risk of burning with establishing their solar callus.

Studies on the harm of Ultraviolet radiation are looking at the picture in isolation, of course it’s considered harmful without healing red/infrared. Same as isolated blue light. This is present in the sun 12 hours out of the day.

If the sun is toxic, ask any dermatologist or doctor why skin cancers like melanoma are associated with low vitamin D? They won’t have an answer

@Grimhood