Its lack is a big health worry
It is banned by WADA for competitive athletes
Benefits of Vitamin B12 Injections Immediate Energy Boost: Many people report feeling more energetic almost immediately after receiving a B12 injection, making it popular for those battling fatigue or low energy levels
Small needle, big results Subcutaneous injections mean smaller needles, easier dosing and less painful than traditional intramuscular injections
You can totally take B12 pills instead of injections if your doc gives you the A-OK
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