For the initial treatment of vitamin B12 deficiency, the usual dose is 100mcg SC/MC, given every day for 10-15 days, followed by maintenance treatment
In a 2018 comprehensive review, Sikiric et al
Do B12 Shots Really Boost Energy, Mood, and Sex Drive
Cagrilintidesemaglutide (CagriSema) versus semaglutide or cagrilintide in people with type 2 diabetes (REIMAGINE 2): a double-blind, randomised, controlled, phase 3 study, The Lancet Diabetes & Endocrinology, 14 , 8, (662-677), (2026)
I lost about 4.2 pounds a month on this shot
CL Answer I take levothyroxine (Synthroid), a thyroid hormone to treat hypothyroidism