Hydrolyzed Collagen can be made from bovine (cow), chicken, or marine (fish) sources. When choosing a good collagen, pay attention to reviews about the smell, the taste and most importantly how it dissolves.
Some hydrolyzed collagen should be added to hot beverages first in order for it to blend well without clumping. Clumping doesn’t mean it’s ineffective. It just means you’ll have to take 1 extra step before consuming it or testing it topically.