can b12 injections cause skin rash Possible allergic reaction to injections?? : r/B12_Deficiency Hives from b12 liquid? :

Those with pre-existing conditions such as irritable bowel syndrome (IBS), functional dyspepsia, or gastritis may be more prone to experiencing stomach upset from supplements generally, including B12 preparations

A much larger study of 19,578 people, including 4,214 children from 6 to 16 years of age, found higher serum vitamin C concentrations to be associated with significantly lower blood lead concentrations (217)

Moreover, this procedure works best for ready and willing people to work hard to achieve results

They are often potent or complex drugs intended to treat specific medical conditions and must be used under professional supervision to ensure safety and effectiveness