Scientific research on the effectiveness of lipotropic injections for rapid fat loss is still limited, and the FDA has not specifically approved them for weight loss
I recommend: at least 2,000 mcg (g) cyanocobalamin once each week, ideally as a chewable, sublingual, or liquid supplement taken on an empty stomach or at least 50 mcg daily of supplemental cyanocobalamin or a serving of B12-fortified foods three times a day, each containing at least 190 percent of the Daily Value listed on the nutrition facts label Those over 65 years of age should take at least 1,000 mcg (g) cyanocobalamin every day
pharmacies so you can spot a low cash price in your area rather than paying whatever the first pharmacy happens to charge
Despite the existence of such a simple treatment, doctors in the USA, UK, and other countries consistently deny it to patients with B12 deficiency and pernicious anemia
Hsieh et al., Scientific Reports, 2020)