To be clear: B12 is not proven to increase how much weight you lose, and it does not change semaglutides mechanism
Of course we cant know if this imposed reduced frequency had any impact however the word pernicious springs to mind
65 Campbell, A., Heydarian, R., Ochoa, C., Dwivedi, A
The FDA added it to injectable semaglutide in January 2025, and it climbs the dose axis like everything else. Burning or tingling skin tracks the dose, not the weight lost, and an active-comparator study put the risk about twice that of another weight-loss drug. The mechanism remains unsettled
Treatment of Vitamin B12 Deficiency Thirty mcg daily for 5 to 10 days followed by 100 to 200 mcg monthly injected intramuscularly
The baby hairs from month two are lengthening and thickening