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Vitamin B12 injections are often used as a treatment for people with vitamin B12 deficiency, a condition that can lead to a range of health problems, including fatigue, weakness, numbness and tingling in the extremities, and difficulty concentrating
Chick and Lubrzynska, 1914)
slow 8-week regimens brought it to 0-3.8%, near placebo, at no efficacy cost (Frias 2020): Frias Lancet 2018
The evidence for this mechanism is less robust than the VEGF/angiogenesis or gut-lining signalling pathways, and it is typically characterised as a secondary or tertiary mechanism in BPC-157 research rather than a primary research focus