Can I use the Collagen Performance Boost if I follow a vegan or vegetarian diet? Matt Mazzino, RD, LD June 28, 2021 15:56 The Collagen Performance Boost is not vegan or vegetarian friendly. Related articles Is there a way to make my blend more flavorful? Is the Fiber Performance Boost gluten free? I thought Collagen was for skin health, how will this benefit my sports performance? What's different about Gainful protein powder from other brands? How do I add more sweetness to my blend? Comments 0 comments Please sign in to leave a comment.