In one study, people with obesity who received vitamin D supplements in addition to following a weight loss diet plan lost more weight and fat mass than the members of the placebo group, who only followed the diet plan
Common minor side effects include injection site soreness or redness
Methionine is needed to make creatine, a nutrient naturally found primarily in muscle tissue that provides the energy our muscles need to move, and has been found to boost athletic performance during short, intense workouts
Unlike a daily oral supplement, most people who need B12 injections get them once or twice a week or even every few weeks, says Foxx
These injections give your amino acid levels a boost, but those levels will return to normal with time, so youll need to replenish the nutrients in order to maintain the enhanced fat-burning they provide