Following on from RSP Nutrition’s introduction of a fourth flavor for its protein powder RSP Whey, adding Cinnamon Bun to the supplement’s menu. The brand is now teasing another flavor for its BCAA formula Regen BCAA, just as it did for RSP Whey before Cinnamon Bun was revealed. It was only two months ago that RSP launched a new option for Regen BCAA making it five for the product with Raspberry Lemonade. While we don’t yet know what flavor the brand is going to be introducing, we do know it will make it a total of six tastes to choose from for fans of the supplement.