is b12 injections safe Are Shots Safe? Side Effects, Benefits & Advice Vitamin B12 injections for MTHFR:

While ruminants can synthesize B 12 via gut bacteria if soil cobalt levels are adequate, monogastric animals like swine and poultry require direct supplementation through fortified feed to maintain health and growth rates in intensive farming environments

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Lets look at some of the evidence behind this: Research-Backed Benefits of B12 for Neuropathy Studies have found that correcting a Vitamin B12 deficiency can alleviate neuropathy symptoms, particularly in patients with diabetic neuropathy and chemotherapy-induced neuropathy