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We used a Mendelian randomization design to test whether this relation might be causal

Support for Metabolism & Weight Management B12 plays a key role in metabolism, helping the body break down fats and carbohydrates more efficiently

Muscle Regeneration and Anti-Aging Benefits: Activates senescent muscle stem cells (muSCs) in aged muscle, promoting proliferation, fusion, and regeneration

Increased Energy and Reduced Fatigue One of the most notable benefits of Vitamin B12 injections is their ability to combat fatigue

My first thought is that you might have B12 deficiency, caused either by inadequate intake or by inadequate absorption of B12