SAMA HOOLE: Farmers. Builders. Beach holidays. Minimal sunburn. No skin cancer epidemic. You burn in 30 minutes now. The sun didn't change. You did. Your skin's fat composition changed. UV light triggers oxidation of PUFAs [i.e., seed oils] in your skin.

Your grandparents could spend all day in the sun.

Farmers. Builders. Beach holidays. Minimal sunburn. No skin cancer epidemic.

You burn in 30 minutes now.

The sun didn't change. You did.

Your skin's fat composition changed.

UV light triggers oxidation of PUFAs in your skin.… pic.twitter.com/WTmJTwDRLN

— Sama Hoole (@SamaHoole) November 25, 2025

Your grandparents could spend all day in the sun. Farmers. Builders. Beach holidays. Minimal sunburn. No skin cancer epidemic. You burn in 30 minutes now. The sun didn't change. You did. Your skin's fat composition changed. UV light triggers oxidation of PUFAs in your skin. Oxidised PUFAs = free radicals = sunburn. Melanoma rates in America: 1950: 1 in 500 2020: 1 in 50 That's a 10x increase. What else increased 10x? Seed oil consumption. The sun hasn't gotten more dangerous. You've become more flammable. Your skin is literally built from oxidisable oils. UV light hits seed-oil-based skin like lighting a match near gasoline. After 6-12 months without seed oils, your skin cells turn over. New cells built from stable fats. People report spending hours in sun without burning, when they previously burned in 30 minutes. Your ancestors didn't need SPF 50. Because their skin wasn't made of flammable materials.