Nootropic profile
Vitamin B3 (Niacin)
Vitamin B3 (niacin) is an essential vitamin and the precursor to NAD+ and NADH, two coenzymes central to cellular energy production, DNA repair, and brain function. It supports cognitive health through energy metabolism, neurotransmitter synthesis, and neuroprotective sirtuin activation.
Best for
Educational only: this is not medical advice. Always check with a qualified healthcare professional before starting any supplement.
What is Vitamin B3 (Niacin)?
Vitamin B3 exists in several forms - nicotinic acid (niacin), nicotinamide (niacinamide), and nicotinamide riboside (NR) - all of which are precursors to nicotinamide adenine dinucleotide (NAD+), one of the most important molecules in cellular biology.
What it does for you
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How to take it
- RDA: 14-16 mg NE (niacin equivalents) per day for adults
- Niacinamide: 500-1000 mg per day for nootropic purposes (does not cause flushing)
- Nicotinic acid: 50-500 mg per day (causes flushing - start very low)
- Nicotinamide riboside (NR): 250-500 mg per day - the preferred form for NAD+ boosting
- NMN (Nicotinamide Mononucleotide): 250-500 mg per day - another popular NAD+ precursor
Watch out for
- Niacin flush: Nicotinic acid causes a characteristic "flush" (warmth, redness, tingling of the skin) at doses above 30-50 mg. Harmless but uncomfortable....
- Liver concerns: Sustained-release niacin at high doses (2000+ mg) has been associated with liver toxicity. Immediate-release forms and niacinamide have...
- Upper limit: 35 mg/day UL for nicotinic acid (based on flushing). Niacinamide is generally safe up to 1000 mg/day.
- Blood sugar: High-dose nicotinic acid may impair glucose tolerance. Those with diabetes should monitor blood sugar levels.
- Drug interactions: May interact with statins, blood thinners, and blood pressure medications. Consult a doctor if on medications.
The science, if you're curious.
- All forms of vitamin B3 are converted to NAD+, the essential coenzyme required for mitochondrial energy production, which is critical for the brain's...
- NAD+ is the required substrate for sirtuin enzymes (SIRT1-7), which regulate gene expression, DNA repair, mitochondrial biogenesis, and inflammatory...
- NAD+ fuels poly(ADP-ribose) polymerase (PARP) enzymes responsible for detecting and repairing DNA damage in neurons, maintaining genomic integrity.
- Niacin helps regulate the kynurenine pathway of tryptophan metabolism, which produces both neurotoxic and neuroprotective metabolites. Adequate niacin helps...
Where to find it
- Poultry: Chicken and turkey breast are excellent sources
- Tuna: One of the richest food sources of niacin
- Peanuts: A good plant-based source of niacin
- Mushrooms: Contain moderate amounts of niacin
- Fortified foods: Many grains and cereals are fortified with niacin
- Supplements: Available as nicotinic acid (niacin), niacinamide, nicotinamide riboside (NR, branded as Niagen), and NMN
Frequently asked
Vitamin B3 (niacin) is an essential vitamin and the precursor to NAD+ and NADH, two coenzymes central to cellular energy production, DNA repair, and brain function. It supports cognitive health through energy metabolism, neurotransmitter synthesis, and neuroprotective sirtuin activation.
The main benefits people report from Vitamin B3 (Niacin) are: Cognitive Enhancement, Energy, Focus, Longevity, Memory, Mood.
RDA: 14-16 mg NE (niacin equivalents) per day for adultsNiacinamide: 500-1000 mg per day for nootropic purposes (does not cause flushing)Nicotinic acid: 50-500 mg per day (causes flushing - start very low)Nicotinamide riboside (NR): 250-500 mg per day - the preferred form for NAD+ boostingNMN (Nicot...
Niacin flush: Nicotinic acid causes a characteristic "flush" (warmth, redness, tingling of the skin) at doses above 30-50 mg. Harmless but uncomfortable....Liver concerns: Sustained-release niacin at high doses (2000+ mg) has been associated with liver toxicity. Immediate-release forms and...
All forms of vitamin B3 are converted to NAD+, the essential coenzyme required for mitochondrial energy production, which is critical for the brain's...NAD+ is the required substrate for sirtuin enzymes (SIRT1-7), which regulate gene expression, DNA repair, mitochondrial biogenesis, and inflamm...
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