Hi there! Just imagined I'd mention that collagen arrives from the gristle / connective tissue and skin. The marrow presents the stock nutrients and taste but In case your desirous to Use a stock high in collagen that is so very good for our joints and pores and skin, So https://frozen-carcass30506.theblogfairy.com/27293005/5-tips-about-chicken-feet-brazil-you-can-use-today