Well, I say my piece in the other thread (about knowing two Paleo people who are haggard, oops, said it again!) Personally I don't think it's weight loss. I gained weight and it didn't lessen the wrinkles on my face!
"I think the basic anti-aging diet is also the best diet for prevention and treatment of diabetes, scleroderma, and the various "connective tissue diseases." This would emphasize high protein, low unsaturated fats, low iron, and high antioxidant consumption, with a moderate or low starch consumption.
In practice, this means that a major part of the diet should be milk, cheese, eggs, shellfish, fruits and coconut oil, with vitamin E and salt as the safest supplements."
- Ray Peat