At $300-450 per month, you are paying a premium for unproven efficacy
In the randomized placebo-controlled HOME trial of 390 adults with type 2 diabetes (de Jager and colleagues, Long term treatment with metformin in patients with type 2 diabetes and risk of vitamin B-12 deficiency, BMJ, 2010), metformin lowered serum B12 by a mean of 19 percent over 4.3 years
In this review, we aimed to clarify the effects of ACs in depressive patients and to explore whether ACs might be the biomarkers for the diagnosis of depression and provide new ideas to treat depression
Chen P, Yang F, Wang W, Li X, Liu D, Zhang Y, Yin G, Lv F, Guo Z, Mehta JL