Collagen powders have flooded the wellness market, promising tighter skin, stronger nails, and healthier joints. The biology behind how the body processes it tells a different story.
The digestion reality
Collagen is a protein. When you ingest it, your stomach acid and enzymes break it down into individual amino acids before it enters your bloodstream. It does not travel directly to your skin and reassemble itself.
The building blocks
While consuming collagen gives your body the necessary amino acids to build new collagen, eating chicken, fish, or beans does exactly the same thing. Your body decides where those amino acids go, not the supplement label.
The clinical evidence
Some minor studies show marginal improvements in skin elasticity, but they are almost entirely funded by the supplement industry. For the average person with a balanced diet, it is a very expensive placebo.