Possible side effects may include mild nausea, flushing, or a temporary metallic taste, but most side effects are rare and short-lived
Sourcing B12 the Right Way Clients arrive having already searched
Used needles and syringes should be disposed of in a proper sharps disposal container
Studies that used 1 mg/day in oral and intravenous trials did not show meaningfully better outcomes than lower doses, and higher doses were associated with more reports of headache, diarrhea, and gastrointestinal effects
Kraus D, Yang Q, Kong D, Banks AS, Zhang L, Rodgers JT, Pirinen E, Pulinilkunnil TC, Gong F, Wang YC, Cen Y, Sauve AA, Asara JM, Peroni OD, Monia BP, Bhanot S, Alhonen L, Puigserver P, Kahn BB. Nicotinamide N-methyltransferase knockdown protects against diet-induced obesity. Nature. 2014 Apr 10;508(7495):258-62. doi: 10.1038/nature13198. PMID: 24717514; PMCID: PMC4107212