Vitamin B6

Is Vitamin B6 Effective?

As you might expect, this vitamin is effective for treating vitamin B6 deficiency (and related problems). It may also be useful for treating hyperhomocysteinemia. There is not enough evidence to suggest that it works for most other uses (see Does Vitamin B6 Work? for more information).

Dosing Information

Because it has been studied quite a bit, good information about vitamin B6 dosing is available. For some of the less studied uses, the most effective (and safe) doses have not yet been established. Recommended Dietary Allowances (RDAs) and Tolerable Upper Intake Levels (UL) have been established for the vitamin.
(Click Vitamin B6 Dosage for more information.)

Side Effects of Vitamin B6

Some people think that vitamins are naturally free of side effects. However, this is simply not the case. Vitamin B6 has been reported to cause various side effects, including (but not limited to):
  • Nausea
  • Vomiting
  • Abdominal pain (stomach pain)
  • Headaches
  • Tingling, numbness, or other unusual sensations in the hands or feet.
(Click Vitamin B6 Toxicity to learn more, including any potentially serious side effects that you should report immediately to your healthcare provider.)

Drug Interactions

Vitamin B6 can potentially interact with a few medications (see Vitamin B6 Drug Interactions).
Last reviewed by: Kristi Monson, PharmD
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