which is better glutathione or nac The Surprising Gut + Energy Benefits of (N-Acetylcysteine) Glutathione vs. NAC: An Expert
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Administered in a clinical setting, these shots bypass the digestive system and ensure immediate absorption into the bloodstream

doi:10.15252/embr.202256574 11

Speaking from my own personal experience, in which pain subsided after no more than two weeks of injections, I wouldn't imagine you'd need to repeat this cycle unless you re-injured yourself

Safia Pirani MD Determining the right B12 protocol requires more than just a standard shot
