Is eating collagen powder worth it?
But Moyad emphasizes that all of this research is preliminary. “The studies are weak in general,” he says—meaning small in scope, short in duration or not yet replicated by follow-up experiments.
Moyad says he also worries about contaminants in collagen supplements and foods. “Since this stuff comes primarily from ground-up animal parts, I would want to know the heavy metal content of these supplements, and also the creatinine content,” he says. Harmful heavy metals like copper and arsenic have turned up in meat products, and creatinine is a toxic breakdown product that comes from muscle tissue.
It isn’t yet clear how much collagen, or exactly which type, is most effective. Moyad says that cheap grocery store gelatin—which is derived from animal collagen—may be just as good for your joints and skin as pricey supplement powders. “But no one’s done the studies, so we don’t know,” he says.
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