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Research into the effects of dietary supplements, such as vitamin B12, on tinnitus is limited
However, although gastric bypass surgeryor any other bariatric surgery where the digestive process is modifiedmakes you more susceptible to a vitamin B12 deficiency, it is not the only thing that can cause it

Beta-glucans and immune pathways.Nature Reviews Immunology(2003)

Nakae et al., 2003

Or safe

Eight injections over the recovery window, sixty-something milligrams each
