Does collagen help build muscle?

The three trials that tried, read closely

Does collagen help build muscle is usually answered from the amino acid table, no tryptophan and little leucine so no, and the table is right, but the honest page gives the trials that tried it a hearing first, because they exist, they are quoted on tubs, and a reader who has seen them deserves to know what they show. There are three worth naming. The first gave fifteen grams a day of specific collagen peptides to older men with sarcopenia, age-related muscle loss, alongside a supervised resistance training programme three times a week for twelve weeks, and reported that the collagen group gained more fat-free mass and more strength than the training-plus-placebo group. The second ran the same design in young, recreationally active men, fifteen grams a day for twelve weeks beside training, and reported greater gains in fat-free mass and strength again, with a muscle proteomics analysis alongside. The third ran it in premenopausal women with the same dose and duration and reported the same direction. Three trials, one design, one result, and a reader who stops there has a case for collagen building muscle. Read closely, the case narrows. Each trial was funded by the manufacturer of the peptide tested, which does not make a result wrong and does make it a result to weigh with the others. Each compared collagen against a placebo of silica, an inert powder, rather than against another protein, so the trials asked whether fifteen grams of collagen beats nothing beside training and not whether it beats fifteen grams of whey, and the answer to the first question was always going to be yes for any protein in a trainee who was not eating enough of it. The older men were exactly that trainee, sarcopenic and habitually low in protein, so that adding fifteen grams of any protein to their day was likely to help, and the young men and women were not screened for high habitual intake either. And the effect sizes, while statistically significant in the trials, were of the order that fifteen grams of extra protein a day beside a new training programme would be expected to produce in people who were not already eating to target. So the three trials show something real and modest: adding fifteen grams of protein a day to a supervised training programme helps, in people who were not already eating enough, and they cannot show that collagen is the protein to add because none of them tested that.

The one direct comparison, the amino acid table it confirms, and the honest reading

The trial that did test it was smaller and answered the question the three could not. In older women during a period of energy restriction and reduced daily steps, the conditions under which muscle is most at risk, whey protein supplementation supported muscle protein synthesis where an equal dose of collagen peptides did not, the direct comparison the training trials lacked, and the result is the one the amino acid table predicts: muscle protein synthesis is triggered by leucine, of which collagen carries around a third of whey's amount per gram, and cannot be sustained without every essential amino acid, of which collagen lacks tryptophan entirely, so a collagen dose that raises blood amino acids does not raise the signal that builds muscle the way a complete protein does, and the muscle protein synthesis literature's broader comparisons, whey against collagen in several designs, come out the same way. The honest reading of the whole record, then: collagen helps build muscle in the sense that any extra protein helps a trainee who was under-eating it, which is what the three training trials showed and what fifteen grams of whey would have shown more of; collagen does not help build muscle gram for gram against a complete protein, which is what the direct comparison showed; and collagen does not count toward the 1.6 grams per kilo a lifter eats for muscle, since the target is written in complete protein and a scoop of collagen counted toward it is a scoop of muscle protein not eaten. What the three trials do lend collagen honestly is a different sentence: a reader who is already eating complete protein to target and trains loses nothing by adding collagen, the still-build-muscle page's bystander verdict, and the connective tissue research, the tendon protocol and the joint trials, is the reason a lifter buys it, not the muscle. The register agrees, since protein's authorised muscle-mass sentence attaches to foods that are a source of protein and collagen powder qualifies by energy, a lawful and hollow line that a separate page takes apart, while collagen itself holds no claim of its own for muscle or anything else. The worked example is stated as not a muscle protein: two capsules, 1200mg hydrolysed type 1 marine collagen with 12mg vitamin C plus zinc, 120 for £16.99 at 28p a day, lab tested and UK made, just over a gram of incomplete protein that no lifter would count, bought for the connective tissue research and vitamin C's collagen formation sentence beside a day of whey, dairy, meat, fish, eggs or soya at 1.6 grams per kilo, and never instead of any of them. Does collagen help build muscle: the trials that tried show extra protein helps, the trial that compared shows collagen is not the protein, and the table said so all along.

What to check on the label