I really respect McCormick as well but on this particular issue he admitted he did not know, just suspected. Currently, there is just not enough evidence to get a definitive answer.

I recently saw a study on the effect of collagen on muscle in particular and it stated that the collagen in bovine and marine are comparable as they both contain type 1 which is the type used in bones. It's just a preference on my part for marine vs. bovine due to the nature of the source. Marine is sourced from cod skin and scales whereas bovine is sourced from the hides of cattle. I guess I'd just rather eat scales than hide! Many sources of bovine collagen state they are from grass fed cattle which I think is super important if you are consuming that form but production of collagen supplementation is so extensive that I just wonder if there really are that many grass fed cattle being raised as the beef industry is predominantly conventional. I guess I'm just a natural born skeptic and I question and evaluate the food and products I think about consuming. Right now, I like Vital Proteins Marine Collagen. It's simple cod and they test for heavy metals which is important for either source you select.

I guess Cleveland Clinic is skeptical too...
The benefits of collagen may be more hyped in the media than the evidence behind it. More published research studies are needed to show the true health benefits of collagen supplements.

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