Water-soluble vitamins
Vitamin B6
Amino acid metabolism
Pyridoxal-5-phosphate; neurotransmitter and amino acid metabolism.
Upper-limit caution
The Tolerable Upper Intake Level for Vitamin B6 is 100 mg per day. Routine intakes above this level — counting food + supplements — raise the risk of adverse effects. Multivitamins, fortified foods, and standalone supplements stack faster than people expect.
How Vitamin B6 appears on labels
Supplement labels list Vitamin B6 under several names depending on the chemical form used. Any of these on an ingredients panel counts toward your Vitamin B6 intake:
- vitamin b6
- vitamin b-6
- pyridoxine
- pyridoxine hcl
- pyridoxal
- pyridoxal-5-phosphate
- p-5-p
- p5p
Deep dive
For mechanism of action, dosing protocols, evidence grade, and interaction warnings on Vitamin B6, see the full encyclopedia entry:
Pyridoxal 5'-Phosphate encyclopedia entry →Related water-soluble vitamins
Track your full intake
Formulate's free desktop app aggregates Vitamin B6 (and ~40 other nutrients) across every supplement in your stack — flagging underdoses, overlaps, and upper-limit overshoots in one view.
Get the appMedical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider. Targets and upper limits are general adult reference values; individual needs vary by age, sex, pregnancy status, and clinical context.