The proposed mechanism that ingested collagen is broken down into dipeptides and tripeptides which then signal collagen repair in the skin is unsubstantiated.

“ah well this is because um it's broken down into the dipeptides and tripeptides in the gut that somehow inform the body that there's an injury in the collagen and we have quote unquote breakdown of collagen AK injury I don't know breakdown of collagen and elastin in the skin all the time and then the body recognizes the presence of those dipeptides and tripeptides so little groups of twos or three peptides not just one and sends those selectively to the skin and so it's like once again it's like it makes sense as a mechanism if it were true but like I just had to like roll my eyes”