Rankings / Essentials — Vitamins & Minerals

Vitamin B6 (pyridoxine / P5P)

Essentials · Vitamin

Tier B

Reviewed by Read Off Label · Last reviewed · How we grade

vitaminmethylationotc
6.4 / 10
Tier B
Ev 8 Bn 5 Sf 5

Bottom line

Read Off Label grades Vitamin B6 (pyridoxine / P5P) as B (6.4/10) based on strong evidence, moderate benefit magnitude, and a med-risk safety profile.

Peripheral neuropathy from chronic high-dose B6 is real and underrecognized — the most common reason to flag a 'high-dose B-complex' regimen.

Typical use: 1. — OTC.

What this is

Peripheral neuropathy from chronic high-dose B6 is real and underrecognized — the most common reason to flag a 'high-dose B-complex' regimen. P5P (pyridoxal-5-phosphate) is the activated form and may be preferred in MTHFR variants or impaired liver function. Doxylamine + pyridoxine (Diclegis) is first-line for morning sickness.

Mechanism

Pyridoxal-5-phosphate (P5P) is the active coenzyme; cofactor for 100+ enzymes including AST/ALT, neurotransmitter synthesis (GABA, serotonin, dopamine), homocysteine remethylation, heme synthesis, glycogenolysis

Dose & route

1.3-2.0 mg/day RDA; 25-100 mg/day P5P typical supplement; 75-100 mg/day for PMS; 10-25 mg with doxylamine for nausea of pregnancy

Citations

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Common questions

Does Vitamin B6 (pyridoxine / P5P) work?
Read Off Label rates the evidence for Vitamin B6 (pyridoxine / P5P) as Strong and the benefit magnitude as moderate, producing an overall grade of B (6.4/10). Peripheral neuropathy from chronic high-dose B6 is real and underrecognized — the most common reason to flag a 'high-dose B-complex' regimen.
Is Vitamin B6 (pyridoxine / P5P) safe?
Vitamin B6 (pyridoxine / P5P) has a med risk profile in published human data. Legal status: OTC. This is not medical advice — see the disclaimer.
What is the typical dose for Vitamin B6 (pyridoxine / P5P)?
1.3-2.0 mg/day RDA; 25-100 mg/day P5P typical supplement; 75-100 mg/day for PMS; 10-25 mg with doxylamine for nausea of pregnancy
How does Vitamin B6 (pyridoxine / P5P) work?
Pyridoxal-5-phosphate (P5P) is the active coenzyme; cofactor for 100+ enzymes including AST/ALT, neurotransmitter synthesis (GABA, serotonin, dopamine), homocysteine remethylation, heme synthesis, glycogenolysis

This is an independent synthesis of published research by a non-clinician. Scores are opinions supported by citations, not prescriptions. See the full disclaimer and methodology for how this score was produced and what it does and doesn't mean.