Collagen Powder Does Not Replace Your Daily Protein

Protein is a chain of amino acids. MedlinePlus splits them into three groups. Nine are essential: your body cannot make them, so food has to supply them. The rest your body can build on its own. Glycine and proline sit in that second group.

Now look at what collagen is made of. The Harvard T.H. Chan Nutrition Source names the amino acids that build collagen as glycine, proline and hydroxyproline. So a collagen scoop is heavy in the ones you are least likely to be short of. It also notes that once collagen is digested, it is broken into amino acids and sent wherever the body most needs protein. Not to your knees by request.

Harvard is direct about this. Some trials found better skin elasticity. Others found better joint movement and less joint pain. But most, if not all, of the research on collagen supplements is funded at least in part by the industry that would gain from a good result, or has authors with ties to it. That makes the true size of the effect hard to read.

It is also worth knowing what a seal on the tub does and does not mean. The NIH Office of Dietary Supplements says the FDA does not decide whether a supplement works before it is sold, and that independent quality seals show a product was made properly, not that it is safe or effective.

Collagen is the most abundant protein in the body, and it builds bone, skin, muscle, tendon and cartilage. Harvard puts collagen at roughly 60 percent of cartilage, which is why a breakdown there shows up as joint trouble. That is the arm of the research with the longer trials, and it is the reason a scoop is defensible as an extra.

As an extra. Harvard also flags the trap: a supplement can become the excuse for skipping the habits that actually protect collagen, such as sleep, sunscreen and not smoking. And the ODS puts it plainly, that supplements cannot take the place of the range of foods a healthy diet needs.