Is your protein kosher? Matt Mazzino, RD, LD January 04, 2022 22:47 Updated Our protein blends are not Kosher at this time. Related articles Are Gainful products organic? Are Gainful products non-GMO? Are the ingredients in my protein WADA-approved? Can I use the Collagen Performance Boost if I follow a vegan or vegetarian diet? How do I retake the quiz or edit my answers? Comments 0 comments Please sign in to leave a comment.