I have been on prednisone for 3 1/2 years and this year began having thin skin and bright and dark red bruises (purpura I think) from the slightest bump on my arms and hands. I just finished a canister of collagen peptides and the bruises are all gone and I am not getting anymore. The collagen I took is Native Path brand. They make several formulas the one I took is labeled Collagen Peptide. I took one scoop per day in a cup of coffee. My facial skin also seems smoother and looks somewhat younger (at age 77). There was no taste that I could tell. They make another formula for bones and I am going to take that now to help my shoulder replacement heal.