Even if the peptide is stable at low pH, there are many proteases and peptidases in the GI tract that break down proteins to be absorbed. If I remember correctly, only single amino acids can cross into the bloodstream, so whole ingested proteins never reach circulation. I am by no means a nutritionist, but knowing this I have a very hard time believing that collagen supplements do anything to increase the collagen levels in the body. I believe they are broken down just like any other protein
97screamingcacti t1_j29cina wrote
Reply to comment by DooDooSlinger in If collagen is a protein, and proteins are broken down during digestion, why would collagen or collagen supplements be beneficial? Is it just hype? by skepticated
Even if the peptide is stable at low pH, there are many proteases and peptidases in the GI tract that break down proteins to be absorbed. If I remember correctly, only single amino acids can cross into the bloodstream, so whole ingested proteins never reach circulation. I am by no means a nutritionist, but knowing this I have a very hard time believing that collagen supplements do anything to increase the collagen levels in the body. I believe they are broken down just like any other protein