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Vitamins & vitamin-like compounds

Vitamin B6

Vitamin B6 (water-soluble vitamin / pyridoxine vitamer family)

Vitamin B6 is a family of vitamers that includes pyridoxine and pyridoxal phosphate; for a useful product comparison, add B6 across every product in the stack and compare the total with the applicable local upper limit.

Water SolubleClinical ResearchForm Dependent EvidenceLow Risk ProfileDose Sensitive
Updated August 2026/4 min read/1 citations
Reviewed by the NootropicsIndex editorial team.Method: prioritize cited human research and official safety or regulatory sources; compare retailer-listed prices without endorsing products.Affiliate disclosure
Supplement group

Vitamin B6 belongs to the Vitamin B group

View all Vitamin B productsVitamin B12 (Cobalamin)Vitamin B1 (Thiamin)Vitamin B2 (Riboflavin)Vitamin B3 (Niacin)Vitamin B5 (Pantothenic Acid)Vitamin B7 (Biotin)Vitamin B9 (Folate)
01

What is it?

Identity and form

1

Vitamin B6 is a family of vitamers that includes pyridoxine and pyridoxal phosphate.

02

Names, aliases and forms

AbbreviationB6
Common NamePyridoxine
03

Mechanisms of action

Biological role

1

Pyridoxal 5′-phosphate supports amino-acid metabolism, neurotransmitter synthesis, and other enzyme reactions.

04

Potential effects and evidence map

Evidence is strong for the essential nutrient role of vitamin B6, but supplementation beyond adequacy has not been shown to produce a reliable general nootropic effect in well-nourished adults. Form-specific clinical uses should be evaluated separately.

Effect domainMagnitudeGrade
Mental energy / wakefulness1
UnknownConfidence: Medium

Evidence does not establish a reliable mental-energy effect from extra Vitamin B6 in well-nourished healthy adults.

Note Essential nutrient biology and correction of inadequate status are different from enhancement.

1/5
C
Memory / learning1
UnknownConfidence: Medium

Direct evidence does not establish a general memory or learning benefit from Vitamin B6 for healthy adults.

Note Keep form- and population-specific clinical research separate.

0/5
C
05

Typical dosages and timing

Nutrition benchmark11.3-1.7 mg/day

Use this to interpret labels and total intake, not as a demonstrated nootropic dose or recommended cycle.

06

Timing & effect horizon

Effect horizonUnknown
Unknown
What timing evidence can show1

No reliable acute nootropic onset, duration, The time for blood levels to fall by half during the final elimination phase.Source claim, or routine cycle is established for Vitamin B6. Nutrient-status correction and clinical follow-up periods answer different questions.

07

Safety, side effects and risk profile

Evidence uncertainty1
Confidence: High

Marketing claims extend beyond the established nutrient or precursor evidence.

Note Separate adequacy, biochemical activity, and enhancement outcomes.

1/5
B
Interaction risk1
Confidence: Medium

Medication, laboratory, and total-intake context can change the practical risk.

Note Check the official source for ingredient-specific interaction details.

2/5
B
GI discomfort1
Confidence: Medium

Tolerability varies with the specific form and amount consumed.

Note This row summarizes ordinary tolerability rather than special-population hazards.

1/5
B
Dose- and form-specific safety1

Long-term high supplemental intakes can cause sensory neuropathy. Limits differ by authority: the U.S. adult UL is 100 mg/day, while EFSA set 12 mg/day for adults in 2023.

08

Interactions and cautions

Medication and test context1

Vitamin B6 can interact with cycloserine and some antiepileptic medicines; theophylline can affect PLP status.

09

Practical buying and quality notes

  • Add B6 across every product in the stack and compare the total with the applicable local upper limit.1
10

FAQ

What distinguishes Vitamin B6 from related forms?

1

P5P still contributes to total B6 exposure; neither an active-form label nor a different salt removes the dose-dependent neuropathy concern.

11

References

  1. NIH Office of Dietary Supplements. Vitamin B6 Fact Sheet for Health Professionals.
Note

This page is informational and summarizes available evidence. It is not medical advice, a recommendation, or a substitute for guidance from a qualified clinician.