"Infrared A light forms up 42% of sunlight. It's the dominant form of light. Turns out red light in you is the fastest way for you to build your solar callus. So that means the more red light you get, the more UV light you can assimilate and you don't need to be outside and you'll never get red.

"You know you've met me, I'm an Irish guy with freckles. I can stay out in the sun for eight to 10 hours. In fact, this weekend on Sunday I was outside watching some of the NFL games, out 10 hours straight in the sun. Do I look like I'm blistered and miserable? No.

"The key is, people don't know this about the skin, that this ability is there. Women are recalcitrant to do this because they assume that they're going to get wrinkles, because that's what the dermatologist tells them. You know what the irony of the story is? The higher your skin redox is, the more mitochondria you have, the more water it makes, the less wrinkles you get. It's actually the opposite. If you want to get wrinkled, sit in front of a computer all day." —Dr. Jack Kruse with Dr. Jack Wolfson @ 59:45 – 01:00:45 https://youtu.be/I537lQoiu5c&t=3585