Great Lake Collagen Hydrolysate is a tremendous product in my opinion. I love the fact it easily dissolves in hot liquids and cold smoothies. It doesn't change the flavor much at all.
It is created from Grass Fed cows. (Not sure if this is that important as you are not digesting fat). It will help create a more balanced amino acid profile as most of the meat we ingest doesn't have this available. The product doesn't contain Tryptophan.
It's highly beneficial for skin health. Joint health is another primary benefit as it helps create healthy cartilage. There are some claims for better sleep. It is beneficial for digestion.
I've been adding it to my espresso in the morning and my pre bed shakes at night. Give it a try for a few weeks and see if you have less joint stiffness in the morning.