The headline is broadly defensible, but the qualifications matter. Effect sizes vary by population, the strongest claims rest on shorter trials, and credible voices push back on how it's typically framed.
I think that it is important to know that if you are eating a standard American diet and you are eating limited quantities of red meat, your collagen synthesis is probably limited because you are getting inadequate glycine, which is why collagen supplements are a multi-billion dollar industry.
Every Sunday: the week’s new conflicts and verdict changes — and nothing else.
Native comments, Twitter mentions, and Reddit threads about this claim — surfaced together so the conversation isn't fragmented across platforms.
Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.
Would love a "what would change this verdict" RSS feed. Sign me up if it exists.
And that the amount of glycine available from synthesis, about 3 g per day, together with that from the diet in the range of 1.5 to 3 g per day, this is in the general public, not in people who are eating animal-based, may fall significantly short of the amount needed for all metabolic uses, including collagen synthesis, by about 10 g per day for a 70-kg human.
The metabolic capacity for glycine biosynthesis does not satisfy the need for collagen synthesis.