A 2020 study of "wellness" B12 injections in non-deficient adults found no improvement in energy, mood, or cognitive function versus placebo at 4 weeks (Wolffenbuttel et al., Nutrients , 2020)
Bhat, A
Ji Q, Zhang L, Jia H, Xu J
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It directly ties to the earnings hit, the raised 2026 revenue outlook of US$2.8 billion to US$3.0 billion, and the effort to reposition Hims & Hers on FDA-approved medications after regulatory pressure on compounded products
Safety concerns have surrounded the drug since it was first developed in the US in the 1990s, particularly its potential to induce melanoma, the deadliest form of skin cancer