If my skin feels dry I eat a few teaspoons of coconut oil per day. Internal moisturiser!
Edit: I agree with the above comment about soap. But if you use it as part of your regime it should be easy enough to filter out. Since I started eating more fat I never have to wash my face anymore.
"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