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Vitamins & vitamin-like compounds

Nicotinic Acid

Nicotinic Acid (nicotinic acid / vitamin B3 vitamer)

Nicotinic acid is the flushing vitamer of vitamin B3; for a useful product comparison, confirm that “niacin” means nicotinic acid, total the dose across products, and do not self-direct pharmacologic lipid doses.

Water SolubleClinical ResearchForm Dependent EvidenceGi Side EffectsLiver CautionDose 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
01

What is it?

Identity and form

1

Nicotinic acid is the flushing vitamer of vitamin B3.

02

Names, aliases and forms

Free Acid FormNicotinic acid
03

Mechanisms of action

Biological role

1

It contributes to NAD metabolism and, at pharmacologic doses, has effects that are distinct from nutritional niacin use.

04

Potential effects and evidence map

Evidence is strong for the essential nutrient role of niacin, 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 Nicotinic Acid 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 Nicotinic Acid for healthy adults.

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

0/5
C
05

Typical dosages and timing

Nutrition benchmark114-16 mg NE/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 Nicotinic Acid. 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.

3/5
B
Dose- and form-specific safety1

Supplemental nicotinic acid can cause flushing from about 30-50 mg; pharmacologic doses can cause hypotension, impaired glucose tolerance, and liver injury.

08

Interactions and cautions

Medication and test context1

High-dose use can interact with antidiabetes medicines and other lipid-modifying therapies.

09

Practical buying and quality notes

  • Confirm that “niacin” means nicotinic acid, total the dose across products, and do not self-direct pharmacologic lipid doses.1
10

FAQ

What distinguishes Nicotinic Acid from related forms?

1

Nicotinic acid is not interchangeable with niacinamide: flushing can start at supplemental amounts and high doses add liver, glucose, and blood-pressure concerns.

11

References

  1. NIH Office of Dietary Supplements. Niacin 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.