We are just choosing which marketing to believe
A useful next read is B12 Shots and NAD+, including what to expect at Perfect B in Doral and greater Miami
Proc Natl Acad Sci 79(2):345349 Ma Y, Huang Y, Yan L, Gao M, Liu D (2013) Synthetic FXR agonist GW4064 prevents diet-induced hepatic steatosis and insulin resistance
Weight loss BCAAs can help you lose weight by protecting lean muscle mass while you work out, meaning that you'll burn fat instead of muscle
Repfuel L Carnitine may help lose weight by converting fat stores into usable energy
But they do lack Allies of Skins stamp of approval, so to speak, from a respected third-party with strict testing requirements