However, some people struggle to absorb enough from diet alone, leading to a deficiency
Cagrilintide works at microgram-level potency (2.4 mg maintenance), while retatrutide requires milligram-level doses up to 12 mg
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 is unsettled: the tempting "it is the drugs signaling arm" story is ruled out, because the strongest GLP-1 signaler in the class carries no such signal
If you follow one of these diets, you may want to get your vitamin B12 levels checked, especially if youve noticed poor hair growth, hair thinning, or increased hair loss
Energy improvements from the B12 component are often felt within the first few days