I believe based on experience, science, and longevity of the supplement... that Vitargo is truly the best for post workout insulin signaling. However, when it comes to cost consideration, Karbolyn along with NTBM GEAR post workout is amazing, and has been working very well for me! I'M BACK ON NTBM'S GEAR DURING THIS CONTEST PREP, and I'm very, very excited about what I have in store with this chicken blood masterpiece