Does taking collagen help you heal faster?

The one place faster has a trial, and what the trial was really testing

Does taking collagen help you heal faster is a question the shelf answers with the word yes and a picture of a knee, and the honest page answers by searching the literature for any study in which collagen made anything heal faster than it otherwise would, because the word faster is a measurement and a measurement needs a trial. There is one place, and it is not where the shelf points. Small randomised, placebo-controlled trials in long-term care residents with pressure ulcers, the deep skin wounds that develop over bony points in people who cannot move themselves, gave hydrolysed collagen or a collagen-containing protein supplement three times a day beside standard wound care for eight weeks, and reported faster improvement in ulcer healing scores than in the placebo group, a result that has been replicated in a second small trial and that is, on its face, collagen helping a wound heal faster. Reading the trials for who was in them changes what the result means. The participants were frail, elderly and largely immobile, many of them under-nourished and short of protein by the measures the trials recorded, and a wound in a protein-deficient body heals slowly for a reason that has nothing to do with collagen in particular: healing is protein synthesis, the laying down of new matrix, new vessels and new skin, and a body short of amino acids cannot do it at pace, which is why wound care guidance for malnourished patients has always included protein and energy supplementation. The trials' authors read their result that way, as amino acid and protein repletion in a deficient population, and the design cannot say otherwise, since no arm received whey, a mixed protein supplement or extra food to show whether collagen did anything a different protein would not have done; collagen's possible advantage, its high glycine, proline and hydroxyproline content as the amino acids most used in wound matrix, is a plausible reason it was chosen and not a demonstrated one. The honest summary of the one place faster has a trial is therefore specific: collagen helped wounds heal faster in people whose bodies were short of the protein collagen is, which is a real result, a useful one for the care of frail patients, and not a result about a fed adult with an injury.

Everywhere else faster has no trial, the stages that keep their time, and the levers that do have evidence

Everywhere else, faster has no trial, and the list of where is the list the shelf is selling to. No study has given collagen to well-nourished adults after surgery and measured time to wound closure or return to function. No study has given it after a cut, a graze or a burn in a fed person. No study has given it after a fracture and measured time to union, the fracture literature on nutrition being about calcium, vitamin D and total protein in the elderly. No study has given it after a tendon or ligament tear and measured time to heal: the tendon evidence is a synthesis marker and one small outcome trial in tendinopathy, a load problem rather than a wound, and the ligament evidence is a stability trial in already lax ankles, neither of them a healing-rate result. And the healing stages themselves, which are what faster would have to shorten, keep their own time in every tissue the body has: inflammatory days in which damaged tissue is cleared and repair cells recruited, proliferative weeks in which a provisional matrix of mostly type III collagen is laid down, and remodelling months in which type I replaces type III and the tissue aligns and strengthens under load, a sequence that no supplement, drug or food has been shown to compress in a fed adult, and that is slowed, not sped, by the things a reader can control. So the honest answer for a fed lifter with a wound or an injury is that collagen is not a lever on healing speed and that four other things are. Protein at 1.6 to 2.2g per kilogram, from complete sources, is the first, because healing is protein synthesis and the pressure ulcer trials are a reminder that a body short of protein heals slowly; a lifter in a hard deficit through an injury has the one brake on healing that the collagen trials actually addressed, and the fix is food rather than a capsule. Not smoking is the second, since smoking impairs blood flow and oxygen delivery and slows healing across skin, bone, tendon and ligament more reliably than anything speeds it. Sleep is the third, the state in which repair runs. Early controlled loading is the fourth for tendons, ligaments and bone, since those tissues heal better and stronger under the strain their cells read than under immobilisation, with the collagen protocol, 15g with vitamin C an hour before the session, as an adjunct beside the loading for a reader who wants its marker evidence. A wound that is hot, spreading, discharging or accompanied by fever is a doctor's assessment, since infection is the common reason a wound heals slowly in a fed person and no nutrient treats it. The worked example is the habit beside a fed plate, stated on its true terms: two capsules, 1200mg hydrolysed type 1 marine collagen with 12mg vitamin C at 15% of its reference value plus zinc, 120 for £16.99 at 28p a day, lab tested and UK made, below the 2.5 to 15g research band, carrying vitamin C's collagen formation sentence and zinc's protein synthesis sentence, with no healing claim, since collagen holds none in the UK. Does taking collagen help you heal faster: where the body was short of protein, yes, as protein; where it was not, nothing has been shown, and the stages keep their time.

What to check on the label