Does 5-HTP interact with Vitamin B6?

Written to our editorial standards · reviewed against published research· Updated 2 Jun 2026
Take together· moderate evidence

B6 helps convert 5-HTP to serotonin.

The enzyme that turns 5-HTP into serotonin depends on vitamin B6 as a cofactor, so adequate B6 supports that conversion, which is why many 5-HTP products already include a little B6.

What to do

Taking B6 alongside 5-HTP is sensible. Crucially, do not combine 5-HTP with antidepressants (SSRIs, SNRIs, MAOIs) or other serotonergic drugs without medical advice, because of the risk of serotonin syndrome, and keep 5-HTP to short-term use.

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5-HTP
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Vitamin B6
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Common questions

Can I take 5-HTP and Vitamin B6 together?
Take together. Taking B6 alongside 5-HTP is sensible. Crucially, do not combine 5-HTP with antidepressants (SSRIs, SNRIs, MAOIs) or other serotonergic drugs without medical advice, because of the risk of serotonin syndrome, and keep 5-HTP to short-term use.
Why do 5-HTP and Vitamin B6 interact?
The enzyme that turns 5-HTP into serotonin depends on vitamin B6 as a cofactor, so adequate B6 supports that conversion, which is why many 5-HTP products already include a little B6.

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Educational use only, not medical advice. Interaction risk depends on dose, your health, and any medications. Always consult a qualified clinician, especially if you take prescription drugs or are pregnant or nursing.