The protein and amino acids in gelatin can help the body build more collagen, a vital element in healthy skin. As people age, their natural collagen levels drop. This can lead to skin losing elasticity and the development of wrinkles. Gelatin is a protein made from animal collagen, usually from cows and pigs. It’s commonly used to make capsules, cosmetics, ointments, and foods. Collagen is one of the materials that make up cartilage, bone, and skin.