Vitamin B3 (Niacin)
Vitamin B3 (Niacin) is an essential vitamin — a water-soluble B vitamin used to form NAD and NADP coenzymes. 2 peer-reviewed studies are available in our database. Common forms include Niacin, Niacinamide, Inositol Hexanicotinate.
Content reviewed by ZYNAVA Research Team · Last updated February 2026 · Editorial policy
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What Is Vitamin B3 (Niacin)?
A water-soluble B vitamin used to form NAD and NADP coenzymes.
Key fact: Niacinamide is a non-flushing form of vitamin B3.
Vitamin B3 (Niacin) Supplement Forms
Vitamin B3 (Niacin) is available in several supplemental forms: Niacin, Niacinamide, Inositol Hexanicotinate, Nicotinamide Riboside. Niacinamide is a non-flushing form of vitamin B3.
Explore Vitamin B3 (Niacin) Supplements
Use our research tool to explore vitamin b3 (niacin) supplements and see what studies have examined.
Research Studies on Vitamin B3 (Niacin)
Our database contains 2 peer-reviewed studies examining vitamin b3 (niacin). Below are selected recent studies:
Related Supplements
Natural Food Sources of Vitamin B3 (Niacin)
While supplementation can be a convenient way to increase vitamin b3 (niacin) intake, many people prefer to start with dietary sources. Understanding which foods are naturally rich in vitamin b3 (niacin) can help you make informed decisions about whether supplementation is right for you.
- Chicken breast — A 3 oz serving can provide roughly 50% or more of the daily value
- Turkey — A reliable source of niacin for many diets
- Tuna — A 3 oz serving provides a large portion of daily niacin needs
- Salmon — Provides niacin plus omega-3 fatty acids
- Peanuts — One of the better plant sources of niacin
- Mushrooms — Some varieties provide meaningful niacin for plant-forward diets
Dietary Context
Niacin (vitamin B3) supports energy metabolism and helps the body maintain healthy skin and nervous system function. It is widely available in both animal and plant foods. The body can also produce niacin from the amino acid tryptophan, which provides an additional nutritional backup when protein intake is adequate.
Absorption: Food vs. Supplements
Niacin is generally stable with typical cooking. Protein-rich foods often provide both niacin and tryptophan, which can be converted into niacin, making balanced diets particularly supportive of B3 status.
Practical Tips
- Include protein-rich foods regularly — they often provide niacin and the building blocks for niacin synthesis
- Plant sources like peanuts and mushrooms can help round out niacin intake
- A varied diet typically provides sufficient niacin without supplementation
How to Take Vitamin B3 (Niacin)
Getting the most from vitamin b3 (niacin) supplementation involves more than just choosing the right product. When and how you take it can significantly affect absorption and effectiveness.
Best time to take: Morning or with meals
With or Without Food
Water-soluble vitamins can be taken with or without food. Taking with food may reduce stomach upset for some people. B vitamins are commonly taken in the morning as they support energy metabolism.
How Often
Daily supplementation is standard. The body does not store water-soluble vitamins in large amounts, so regular intake is important.
Practical Tips
- B vitamins are best taken in the morning — they may interfere with sleep if taken late in the day
- Excess water-soluble vitamins are generally excreted in urine, making toxicity less of a concern
- Taking with a meal can reduce any stomach discomfort
Important Interactions
- High-dose B6 supplementation over long periods can cause nerve issues
- Vitamin C can affect certain lab tests at very high doses
- Generally well-tolerated with wide safety margins
This is not an exhaustive list of interactions. Always consult a healthcare provider or pharmacist about potential interactions with your specific medications and health conditions.
Where to Find Vitamin B3 (Niacin) Supplements
If you are considering vitamin b3 (niacin) supplementation, choosing a quality product from a reputable retailer is an important step. Here are some trusted options where you can browse and compare vitamin b3 (niacin) supplements.
How to Choose a Quality Vitamin B3 (Niacin) Supplement
- Check for third-party testing certifications (USP, NSF, or ConsumerLab) which verify potency and purity
- Compare cost per serving rather than total package price for accurate value comparison
- Read the supplement facts panel to verify the amount of active ingredient per serving
- Look for products with minimal unnecessary fillers, binders, or artificial additives
To explore supplements by ingredient or health goal, try our AI Supplement Advisor.
Research Highlights: Vitamin B3 (Niacin)
Researchers have investigated vitamin b3 (niacin) across 1 review, 1 meta-analysis, with publications spanning 2015 to 2024. The summaries below highlight key findings from these studies. As with all research, results should be considered within the broader body of evidence and may not apply to every individual.
Vitamin D and immune function
Essential for immune response. Supports T-cell function. Reduces infection risk.
Source: View full study on NIH
Vitamin D3 vs D2 absorption study
D3 is 87% more effective than D2. Better at raising blood levels. Superior tissue distribution.
Source: View full study on PubMed
The research summaries above are based on published peer-reviewed studies and are provided for informational purposes only. Study findings may not apply to all individuals, and the presence of a study summary does not constitute an endorsement of vitamin b3 (niacin) for any specific health condition. Always consult a qualified healthcare professional before making decisions based on research findings.
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