I’m not entirely convinced it will survive the digestive process and actually make its way to the cells that might regenerate collagen. Probably a case of it just passing straight through the body. However, no harm in trying. The degradation of articular cartilage (packed with collagen) was part of my Masters research and sadly it is one of those tissues that is built as we grow and really isn’t replenished well by the body as we age. (Hence arthritis and joint degradation/replacement). There are also genetic factors at play too. Collagen/Stem cell might elucidate more but that’s all quite thin on the ground at the mo. 

 Good points on the cartilage.

Anecdotally, hair and nail growth is noticeably faster while supplementing collagen peptides so it could still have use for vascular tissues like skin. Maybe indicates it has durability to survive digestion 

 Yeah that’s the basic thinking behind hydrolysed collagen - that it might stand a better chance of being utilised by the body. Have to say that I’m more of a fan eating naturally, especially meat as this will provide the core building blocks for protein and collagen after being processed by the body and gut. Not purely meat as I believe we need some roughage and certain vitamins. Big fan of rice and peas too, as together they provide a balanced and complete amino acid profile. Meat, rice and peas and a bit of salad/veg and I’m very happy! 

 So much unknowns, i tend to try things one at a time and see if it had an impact on anything, to gather data at least 

 Same! No rice for me but all organic salads (no dressing), prioritizing meat over everything. Usually just chicken.

Do you supplement with any desiccated organ meats? I take beef liver powder regularly and am considering adding some other organs to the mix 

 I don’t. Although I love fresh liver and I’m also quite partial to a good haggis. 

 Red light therapy seems to stimulate collagen production, but that’s mostly superficial (skin and underlying tissues)