This is a very simple test to be done while you’re adjusting your diet to ensure that you’re getting plenty of skin food (oils, A, E, B’s, C, zinc, essential aminos, gelatin/collagen).
Wheat germ oil, good source of Skin Food
Simply feel the back of your upper arms. The skin above your elbow should be smooth and moist.
If there are bumps, dryness, then you’re not getting enough oils. Drink the protein shake with extra eggs, take in coconut oil, use butter and olive oil as liberally as you can digest.
Then pinch a bit of skin on the top of your hand, pull it up and release. Check the elasticity. It should spring back and leave no mark.
Compare with other people of various ages to get an idea as to how elastic your skin really is.
If the skin seems slow to return to its original shape or leaves a mark, you may be deficient in collagen, gelatin, E, C, B’s.