doi: 10.3389/fnut.2026.1781406 Received 05 January 2026 Revised 05 February 2026 Accepted 11 February 2026 Published 05 March 2026 Volume 13 - 2026 Edited by Pasquale Perrone, University of Naples Parthenope, Italy Reviewed by Muyao Cui, Beijing University of Chinese Medicine, China Claudia Moriello, University of Campania Luigi Vanvitelli, Italy Updates Copyright 2026 Vargas, Ferreira, Ingaramo, Collins and DAlessandro
Some patients feel differences within the first few weeks, though more noticeable weight loss typically happens once youve moved up to higher doses
Private doctor Expect to pay anywhere from $50 to $250 in private clinics
A serum B12 test under 200 pg/mL indicates a deficiency
Toxicity appears quite low
You do not need to train every day