When you eat collagen-rich foods or take collagen supplements, your body digests that collagen into smaller compounds. Collagen you eat doesn’t automatically become new collagen that affects or improves your skin, hair, and nails. Your body treats the digested collagen mainly as food.
BioSil works differently. The BioSil ingredients activate certain collagen-producing cells and enzymes that your body uses to make new collagen by itself. BioSil "switches on" these cells (called fibroblasts), so your body can regenerate lost collagen.