There is no robust randomised controlled trial evidence demonstrating clinically meaningful weight loss from lipotropic injections independent of dietary restriction and lifestyle changes
Mammalian herbivores, including nonhuman primates like gorillas, and our fellow great apes, get all the B12 they need by practicing coprophagy, the eating of feces, but my preference would be to take B12 supplements
Safe Use, Dosage, and NHS Guidance on Vitamin B12 Pills The NHS recommends 1.5 mcg daily for adults, but therapeutic doses for deficiency are much higher oral cyanocobalamin 50150 mcg daily for dietary deficiency, or intramuscular hydroxocobalamin 1 mg for absorption-related causes
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