Why You Should Be Using Lipo B and Lipo C Shots to Increase Energy and Boost Metabolism LT Clinics Lipo B vs Lipo C: What's the Difference? We get this question often in clinic what's the difference between Lipo B and Lipo C, and how do you know which one to choose? Both are Lipotropic B12 Injections Lipo C is short for Lipotropic Carnitine. This combination is perfect for promoting lean muscle growth and fat loss. (Can be used solo or in combination with other medical weight loss methods)