Will it challenge the prosperity, or even the survival, of this or that species of plant or animal? (livescience.com)
Protein powders can come from plant or animal sources, each having a different make - up of amino acids. (purefoodcompany.com)
But could you tell how much of that protein came from good quality animal sources and how much came from cheap plant or animal sources? (dogsnaturallymagazine.com)