Vitamin B12 is primarily found in animal-based foods, including beef, salmon, yogurt, and milk, though some plant-based foods, like nutritional yeast, are fortified with it
That means weekly shots are often needed in the beginning to keep energy and mood consistently up
Vitamin B12 has also proved efficacious in male and female infertility caused by hypovitaminosis B12
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NIH Office of Dietary Supplements Vitamin B12 Health Professional Fact Sheet: link MedlinePlus Cyanocobalamin injection: link Mayo Clinic Cyanocobalamin (intramuscular route): link IAPAM MIC Injections: link Fastic Do Vitamin B12, Lipo, and MIC Injections Actually Work for Weight Loss?: link FDA Using Fat-Dissolving Injections That Are Not FDA Approved Can Be Harmful: link Jacobson Cosmetic Surgery SlimShots (MIC/B12): link Eden B12 MIC Shots for Weight Loss: Cost & Reviews: link Journal of Clinical Endocrinology & Metabolism Inositol for PCOS: Systematic Review and Meta-analysis (2024): link