They use a lot of synthetic ingredients, but seem to choose the ones with the best safety profiles. (gimmethegoodstuff.org)
The therapy had a favorable safety profile with the most common adverse event reported as irritation at injection site, which was reported in the placebo group as well. (sciencedaily.com)
But generally speaking, whey protein has an excellent safety profile and most people can consume it without any problems whatsoever. (healthline.com)