Can you take too much collagen for skin?

The production ceiling: why the dermis cannot use more than a little

Can you take too much collagen for skin is a question that assumes the skin's collagen is limited by supply, so that more swallowed collagen means more skin collagen up to some point of excess, and the honest page begins with the biology that says otherwise, because the skin has a production ceiling and not a supply ceiling, and that one fact answers the question. Dermal collagen is made by fibroblasts, the sparse cells scattered through the dermis, and a fibroblast makes collagen at a rate set by its own state: the growth factors reaching it, the mechanical tension it feels in the matrix around it, the hormones in the blood, oestrogen above all in women, and its age, since fibroblast output falls across the decades and sharply after menopause. What does not set the rate, once a modest supply is met, is how much substrate is queued outside the cell, because the amino acids collagen is built from, glycine, proline and lysine, are abundant in the free amino acid pool of any fed adult, glycine and proline being made in the body and lysine supplied by every complete protein eaten, and a fibroblast reaching for them finds them whether or not the reader took collagen that morning. So the dermis is rate-limited by its cells and not by its supply, which is the same reason a factory running one shift does not produce more when a second lorry of raw material arrives at the gate: the material waits, or in the body's case is used elsewhere or burned for energy at four calories a gram. The small peptides that survive digestion, prolyl-hydroxyproline among them, are proposed to act on fibroblasts as a signal rather than a material, which is the honest mechanism behind the skin trials, and a signal is also rate-limited, since a cell told twice to do something it is already doing does not do it twice as fast. Everything above predicts one thing about dose: that beyond a modest intake, more collagen should produce no more skin collagen, and the trials were positioned to check.

The flat dose-response, what too much costs, the skin's real too-muches, and the worked example

The trials checked and the dose-response is flat. Across the oral collagen skin trials, doses of 2.5 grams a day and 10 grams a day over eight to twelve weeks produced changes in skin elasticity by cutometer and hydration by corneometer of similar size against placebo, a few percent in each case, with no trial demonstrating a proportional gain from the fourfold higher dose, the eight-week eye wrinkle depth trial at 2.5 grams sitting beside the ten-gram elasticity trials with results of the same order, and this flatness is the signature of a rate-limited process, the signal saturating at a modest dose and the extra grams doing nothing the instruments could find. So too much collagen for skin has a precise definition: any gram past ten, the top of the skin trials, and probably any gram past a good deal less, since 2.5 did what ten did. The excess does no harm to the skin, since there is no mechanism by which a queued amino acid damages a dermis and the trials at up to fifteen grams for a year recorded no skin adverse event above placebo, and it does nothing for the skin either, so the cost of too much is the cost of any unneeded protein: four calories a gram, thirty-six for a dessertspoon beyond the need and seventy-two for a scoop, fullness and mild bloating at scoop doses in the first fortnight, and, for a lifter tracking protein, complete protein displaced from the day if the collagen is counted as such. The skin's real too-muches live elsewhere in the same aisle and the honest page names them: the sugar in collagen gummies, shots and flavoured drinks, two to four grams a gummy and several a shot, taken daily for a skin habit, when the glycation literature links chronically high sugar exposure to cross-linked, stiffened dermal collagen, the opposite of the promise; and high-dose vitamin A in some skin, hair and nails formulas, the one skin nutrient with a real upper level and a real toxicity, none of which is in a plain collagen tub. Vitamin C, the cofactor the trials paired with collagen and the holder of the register's collagen formation sentence for skin, is water-soluble and has its excess excreted, so the pairing is not a too-much either at label doses. The worked example sits below the trials' floor and states its terms: 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, no sugar, below the 2.5 grams at which the skin trials began, taken for vitamin C's collagen formation sentence for skin and zinc's normal skin line, a signal-sized dose that the flat dose-response suggests loses less to its smallness than the shelf implies and that this site still states as below the band. Can you take too much collagen for skin: the dermis stops using it long before any harm, the trials show the ceiling at a modest dose, and the excess is calories and fullness, while the aisle's real skin excesses are sugar and vitamin A.

What to check on the label