Any discomfort typically subsides quickly
[14] Healthcare professionals generally counsel pregnant or nursing mothers to instead rely on prenatal vitamins or physician-supervised nutrition plans rather than lipotropic injections in order to protect the baby
However, there is no scientific evidence supporting B12 supplementation for direct fat loss in individuals with normal B12 levels
Excessive doses can leads to potential risks such as inhibition of breast milk production
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