Does marine collagen help with hair?

Sources one and two: the amino acid profile that is bovine's, and the trials that do not exist

Does marine collagen help with hair is a question the shelf has answered so often that the claim has become furniture, and the honest page traces it back to its sources, because a claim with three sources that each fail is a claim with none, and a lifter or a reader with thinning hair deserves to see where it came from. Source one is the amino acid profile, the argument that marine collagen supplies the building blocks of hair. Marine collagen is hydrolysed type 1 collagen from fish skin and scales and bovine collagen is hydrolysed type 1 collagen from hide, and once hydrolysed they have the same composition, a third glycine, high proline and hydroxyproline, low leucine, no tryptophan and almost no cysteine, so anything the profile argument says about marine it says about bovine, and the shelf's preference for marine on hair grounds has no chemistry behind it. Worse for the argument, hair is not collagen. Hair is keratin, a protein whose strength and shape come from disulphide bonds between cysteine residues, and cysteine is the amino acid collagen most lacks, so the building block hair needs most is the one marine collagen supplies least, and the amino acids hair does need arrive in adequate quantity from any complete protein diet at 1.6 grams per kilo, which collagen does not count toward. Source one fails for marine as it fails for bovine. Source two is the hair trials, and there are none: no randomised trial has given marine collagen alone and measured hair density, shedding, thickness or growth rate as an outcome, and the oral collagen trials that exist measured skin by cutometer and corneometer, joints by questionnaire, tendon by synthesis marker and bone by density scan, none of them hair, so a marine collagen tub that claims hair evidence is quoting a study that was never run. The hair claims on such tubs are extrapolations, hair grows out of skin and the skin trials showed a few percent by instrument, which is true and is not a hair trial, and the hair cycle makes the extrapolation weaker still, since scalp hair grows about a centimetre a month, follicles rest for around three months before shedding, and any change from any cause takes three to six months to become visible, which no collagen skin trial ran long enough or looked at the right tissue to see.

Source three: the marine protein complex, whose result the shelf borrows, and the honest answer

Source three is the one place fish and hair genuinely meet in a trial, and it is where the marine-for-hair claim actually comes from, so it deserves exact description. A proprietary oral supplement, sold for thinning hair for decades, combines a marine-derived protein extract, from fish and shellfish, with vitamin C, zinc, biotin, horsetail silica and other ingredients, and randomised placebo-controlled trials of that formula in women with self-perceived thinning hair reported increased hair counts, thickness and reduced shedding over three to six months, trials funded by the manufacturer and testing the whole formula against placebo. The shelf's inference runs: the formula is marine, the formula grew hair, therefore marine collagen grows hair, and the inference fails at every step. The formula is not marine collagen, it is a proprietary protein extract of undisclosed composition in a mixture; the trials did not isolate any single ingredient, so the result belongs to the whole and cannot be assigned to the fish protein; and several of the mixture's other ingredients are exactly the nutrients that hold the register's hair sentences, biotin, zinc and selenium each contributing to the maintenance of normal hair and copper to normal hair pigmentation, so the most parsimonious reading of a mixture that includes zinc and biotin growing hair in women who may have been short of them is the registered nutrients, not the fish. Source three, then, is a real result borrowed by the wrong ingredient. The honest answer assembles from the three traces: marine collagen does not help hair on any evidence of its own, its profile is bovine's and lacks the cysteine hair is made of, no trial has tested it alone for hair, and the marine-and-hair result the shelf leans on belongs to a formula and its registered nutrients. A reader with real shedding, more than the normal fifty to a hundred hairs a day, has common checkable causes, low iron, thyroid, the shedding that follows illness, birth or stress by three months, some medicines and pattern loss, each a doctor's blood test rather than a tub, and a three-to-six-month marine collagen experiment is that long with the cause unlooked for. The worked example carries the one hair sentence honestly and the collagen without one: two capsules, 1200mg hydrolysed type 1 marine collagen with 12mg vitamin C plus 1.5mg zinc, 120 for £16.99 at 28p a day, lab tested and UK made, the zinc contributing to the maintenance of normal hair at 15% of its reference value, the marine collagen stated as carrying no hair evidence and taken for vitamin C's collagen formation sentence. Does marine collagen help with hair: the profile says no, the trials say nothing, and the fish-and-hair result belongs to a mixture whose zinc and biotin hold the sentences.

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