 There's no one magic elixir to fitness, anti-aging, looking good, lean. But if I had to pick one, that's the most underestimated, is vitamin D levels. So I just tested my vitamin D. When I was living in Puerto Rico, when I'm in Puerto Rico, my vitamin D goes like 70 in my blood serum, right? It's amazing. I was in Scandinavia during the winter. For right now, you see how pale I am. Dropped to 28 and I feel it, sleep. It's harder to lose weight, metabolism. So you got to go insane devotion to mastering all the science of vitamin D.