Don't count on vitamin B-12 to relieve allergies. One recent clinical trial did show some improvement in symptoms—after participants got 2,500 times the recommended daily allowance of three to four micrograms of B-12 for up to six weeks. But one trial is not conclusive—more research is necessary.
Good news: Even if vitamin B-12 does not help relieve allergies, it helps to keep you healthy. But don't take huge doses of B-12 or any vitamin without consulting your doctor first.
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