good brand of l carnitine for weight loss iSatori L-Carnitine 1500, Triple-Blend Liquid Supplement, with Acetyl & Tartrate, Stimulant Free Energy, Low Calories, Sugar or Gluten, Keto-Friendly, Mixed Berry Flavor (24 Servings) : Health & Household ProCaps Laboratories | Acetyl L-Carnitine
Description
Consume between meals, 30-45 minutes before workouts, and/or immediately after workouts

Intense workouts strength and HIIT training

However, B12 is not directly involved in fat metabolism the way L-carnitine is

Yes, L-Carnitine has a huge recognition as a potent fat burner
