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Protects Against Cellular Aging: Neutralizes oxidative stress and promotes healthier, more resilient cells

Studies show similar testosterone increases with potentially fewer mood-related side effects

Whilst this technique can be applied to humans, in practice it is not used, likely related to the costs associated with the dosages required
Methylcobalamin supports healthy nerves and red blood cell production, while folic acid helps in cell growth and blood formation

1998 May 15;43(10):734-9

While some places might market it for general energy boosts or weight loss, if your B12 levels are already normal, there's little scientific proof that these injections will give you a significant energy rush or help you lose weight