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4 A meta-analysis of findings from 11 clinical trials (seven that used transcranial direct current stimulation [tDCS], three that used transcutaneous electrical nerve stimulation [TENS], and one that used electroacupuncture of the ear) found electrical stimulation in general reduced Tinnitus Handicap Inventory scores and measures of tinnitus loudness and distress

Vegetarians and individuals over 50 face particularly elevated risk, as do people with digestive conditions affecting nutrient absorption

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Many patients with B12 deficiency, especially those with pernicious anemia, have difficulty clearing cyanide

You have nausea, vomiting, or diarrhea