As you age, L-Citrulline and L-Arginine aren't going to work as well for you as they used to. The ENOS (endothelial nitric oxide synthase) which is what's needed to produce nitric oxide isn't going to be as effective for us as we age. ⁠ ⁠ If you're already in a position where you're beginning to notice that L-Citrulline and L-Arginine aren't working for you like they were, then here's my suggestion. You should now in addition to supplementing that L-citrulline and L-Arginine or by completing swi