methylated glutathione The Absorption Company Electrolyte Powder - Recovery Hydration Packets - Liposomal Glutathione, Vitamin C & B - Instant Energy - Vegan Post Workout Drink Supplement Glutathione - MTHFR variant

This may explain why so many people say they feel amazing when taking vitamin B12 shots and injections even if they were taking oral forms of vitamin B12 previously

doi:10.1371/journal.pone.0033944 Lederman RJ, Mendelsohn FO, Anderson RD, Saucedo JF, Tenaglia AN, Hermiller JB, Hillegass WB, Rocha-Singh K, Moon TE, Whitehouse MJ et al (2002) Therapeutic angiogenesis with recombinant fibroblast growth factor-2 for intermittent claudication (the TRAFFIC study): a randomised trial

Regulation of eukaryotic phosphatidylinositol-specific phospholipase C and phospholipase D

It works quickly because healthcare providers inject the vitamin directly into the muscles, unlike supplements that may take longer to be absorbed by the body

That's a rule payers enforce through NCCI edits