response: I don't know those fine details but FPP has sanitary, purity and functional characteristics that make them human food ingredients.
original_response: I'm not sure? I do know it is put through a vigorous sanitation process.  It has to meet certain purity and functional aspects to be considered food grade.
history: I drink protein powder with nothing but water Really? Have you tried fish protein powder or FPP? It's a powder for people to consume. Does it smells and taste good. Maybe I could give it a trial. I am trying to gain muscles here
knowledge: Fish protein powders have various sanitary processing, purity and functional characteristics which establish them as human food ingredients.