What are the symptoms of too much collagen?

The list checked: what is real at scoop doses and what is plausible

What are the symptoms of too much collagen is answered on most of the internet with a list of eight or so, and the honest page checks the list against the only evidence that can check it, the adverse event tables of the trials that gave hydrolysed collagen at 2.5 to 15 grams a day for eight weeks to a year, because a symptom that appears in those tables above the placebo arm is a symptom of collagen and one that does not is a symptom of something else. Real at scoop doses: fullness, bloating and a lingering aftertaste. A twenty-gram scoop is twenty grams of protein in a glass of water, and twenty grams of any protein taken fasted or shortly before lying down sits heavily in some readers, with fullness, a little bloating and the occasional loose stool, the supplement tolerance literature filing collagen among the mild ones, and a faint fishy or gelatinous aftertaste in some marine powders taken in water. These are dose-dependent in the plain sense, present at scoop doses, faint at a dessertspoon of ten grams, and absent at capsule doses, and the fix is the dessertspoon, the meal or the capsule. Plausible but not proven: heartburn. A protein drink taken fasted, or late in the evening in a reader who already gets reflux, can provoke it, as any protein drink can, and the trial tables do not separate it out above placebo, so the honest filing is plausible for the reader prone to it and fixed by taking the dose with a meal. That is the whole of the list that survives the check at the top, and it is the ordinary profile of a protein powder rather than anything specific to collagen, which is what a reader taking twenty grams of anything in water should expect.

The list checked: what did not beat placebo, what was misattributed, the footnote, and the ceiling

Not above placebo: headaches and rashes. Both appear on the internet's list and both appear in the trial tables, in the placebo arms as often as the collagen arms, which is the signature of a symptom that people have anyway over twelve weeks and attribute to whatever they started, so neither is a symptom of too much collagen. The one real rash on this page is an allergy, not an excess: marine collagen is hydrolysed fish skin and scale protein, the allergen a fish allergy reacts to, so a reader who develops hives or swelling after starting a marine collagen has a fish allergy to discuss with an allergist, stops the marine product and chooses bovine, and has not taken too much of anything. Misattributed: high blood calcium. This one has a history worth printing, because older collagen products made from bone and cartilage, and some marine products made from whole fish rather than skin, carried meaningful calcium along with the collagen, and case reports of raised calcium from very high intakes of those products became, on the internet, a symptom of collagen itself; hydrolysed collagen from skin carries almost no calcium, and a reader worried about it reads the label's mineral line, where a skin-derived hydrolysate shows none worth listing. The footnote: hydroxyproline, around a tenth of collagen, is metabolised partly to oxalate, and the gelatin feeding studies show urinary oxalate rising after large loads, which is not a symptom, since a reader does not feel their urinary oxalate, but is a note for the reader who has formed calcium oxalate stones, who keeps collagen modest and asks. Not a symptom at all: weight gain, since collagen is four calories a gram and a scoop is a small apple's worth, added weight coming only from a surplus and not from the protein; and the muscle or strength the shelf implies, since collagen builds neither. Then the ceiling, which is the real answer to too much: no authority has set an upper level for collagen, because it is a food protein without a toxicity to set one against, so too much is not defined by a symptom but by two practical limits, the fullness that arrives around a scoop and the fifteen grams a day past which the trials simply have no data, so a reader above fifteen grams is not poisoned but is off the map, paying for protein that is neither studied nor complete. The worked example is a dose too small to produce any line on this list: 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, below the research band and taken for vitamin C's collagen formation sentence, marine, so the fish-allergic reader chooses bovine. The symptoms of too much collagen, checked: fullness, bloating and a taste at scoop doses, possibly heartburn, and nothing else the trials can find.

What to check on the label