With some of the
B vitamins, unfortunately, yes. In fact, a
vitamin B6 overdose can lead to nerve toxicity, while B3 can lead to nausea, jaundice, and liver toxicity.
Too much folic acid,
too, can mask the symptoms of a
B12 deficiency. ... Typically, 300 mg of
B6 is scary territory, while 2000 mg of B3 is risky.
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