Niacin

Description

Niacin, also known as vitamin B3, is a water-soluble vitamin that is essential for numerous metabolic processes in the body. It plays a critical role in converting carbohydrates, fats, and proteins into energy, making it fundamental for cellular function and overall vitality. Niacin also participates in DNA repair and acts as an antioxidant. Beyond its energy-producing roles, Niacin is crucial for maintaining healthy skin, supporting the nervous system, and ensuring proper digestive function. It exists in several forms, including nicotinic acid and nicotinamide (niacinamide), each with slightly different physiological effects and applications, particularly concerning cholesterol management and skin health. Historically, Niacin has been used to treat pellagra, a disease caused by severe B3 deficiency. Today, it is recognized for its potential benefits in supporting cardiovascular health by influencing lipid profiles and contributing to cognitive function, though high doses should always be managed under professional guidance due to potential side effects.

Sources
Meat (poultry, beef, pork)Fish (tuna, salmon)Nuts (peanuts)LegumesGrains (brown rice, fortified cereals)MushroomsAvocados
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Timing & Intake
AnytimeWith foodTake with Niacin, especially in its nicotinic acid form, can cause a 'flush.' Taking it with food can help mitigate this effect.
Niacin (specifically nicotinic acid) can cause a 'niacin flush' characterized by redness, warmth, and itching. Taking it with food or opting for the niacinamide form or 'no-flush' niacin can reduce this. It's generally advised to take it with meals.
Daily Intake
RDA (Men)16 mg
RDA (Women)14 mg
RDI16 mg
Optimal Dosage
Minimum20 mg
Maximum100 mg
Safety & Toxicity
Upper Limit (UL)35 mg
Toxicity Threshold500 mg
Toxicity Effectflushing; hepatotoxicity at ≥1000 mg
Goals
Metabolism Boost
Metabolism Boost
Impact
Highest effect
Typical dose:16–500 mg
Niacin (Vitamin B3) is critical for cellular energy production. As a precursor to NAD+ and NADP+, it is directly involved in glycolysis, the Krebs cycle, and the electron transport chain—the core pathways for generating ATP from carbohydrates, fats, and proteins. Its role is foundational for a high-functioning metabolism.
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Cardiovascular Support
Cardiovascular Support
Impact
High effect
Typical dose:250–1000 mg
Niacin is one of the most powerful supplements available for positively modulating the entire lipid panel, particularly for raising HDL. This strong clinical efficacy warrants a high priority, with the caveat that it should be used with awareness of the flushing side effect.
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Hair Health
Hair Health
Impact
Moderate effect
Typical dose:16–100 mg
Niacin (Vitamin B3) promotes vasodilation, which widens blood vessels and improves circulation. Enhanced blood flow to the scalp ensures that hair follicles receive a richer supply of oxygen and essential nutrients, which is vital for robust hair growth and strength.
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Heart Health
Heart Health
Impact
Situational effect
Typical dose:250–1000 mg
Niacin (Vitamin B3) inhibits the production of VLDL (a precursor to LDL) in the liver and reduces the breakdown of HDL. While effective for lipid modification, its use is more situational due to the "niacin flush" side effect and studies showing it may not reduce cardiovascular events when added to statin therapy. Best used under medical supervision.
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Skin Health
Skin Health
Impact
Situational effect
Typical dose:250–750 mg
Supplementing with Niacinamide (a non-flushing form of Niacin/Vitamin B3) has been shown to increase the production of ceramides and other barrier lipids, enhancing barrier function. Its anti-inflammatory effects make it beneficial for conditions like acne and rosacea, improving overall skin tone and texture.
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Product stats
Price per product
Average$28.38
Median$24.00
Price per serving
Average$0.65
Median$0.47
Price per 100 mg
Average$1.05
Median$0.54
Price distribution
Price per serving distribution
Price per 100 mg
Reference amount: 100 mg
Forms
Paired ingredients
Ingredient forms
Niacinamide (652)88
Niacinamide, also known as nicotinamide, is one of the two primary forms of vitamin B3. Unlike nicotinic acid, it does not typically cause the vasodilation known as the 'niacin flush', making it a preferred choice for general supplementation and skincare. It plays a crucial role in cellular energy metabolism, DNA repair, and antioxidant processes. Topically, it's widely used to improve skin barrier function, reduce inflammation, and minimize pore appearance.
Pros
  • Does not cause 'niacin flush'
  • Well-tolerated for general supplementation
  • Beneficial for skin health (topical and oral)
  • Supports cellular metabolism and DNA repair
Cons
  • Less effective than nicotinic acid for significant cholesterol lowering at therapeutic doses
  • High doses can still cause digestive upset in some individuals
Per product
Avg$30.90
Med$26.00
Per serving
Avg$0.79
Med$0.55
Per 10 mg
Avg$0.33
Med$0.15
Price distribution
Vitamin B3 (133)95
Vitamin B3 is a vital water-soluble vitamin encompassing several forms, primarily nicotinic acid (niacin) and niacinamide (nicotinamide). It is a precursor to Nicotinamide Adenine Dinucleotide (NAD) and Nicotinamide Adenine Dinucleotide Phosphate (NADP), coenzymes involved in over 400 enzymatic reactions. These reactions are fundamental for converting food into energy, synthesizing fatty acids and cholesterol, DNA repair, and antioxidant defense, supporting nearly every cell in the body.
Pros
  • Essential for over 400 enzymatic reactions
  • Crucial for energy metabolism and ATP production
  • Supports DNA repair and antioxidant systems
  • Versatile in its forms, addressing different health needs
Cons
  • Specific forms can have significant side effects (e.g., niacin flush from nicotinic acid)
  • High doses of certain forms may require medical supervision
Per product
Avg$25.07
Med$21.54
Per serving
Avg$0.48
Med$0.34
Per 10 mg
Avg$0.11
Med$0.05
Price distribution
Niacin (95)85
Niacin, specifically nicotinic acid, is a form of Vitamin B3 that has a significant impact on blood lipid levels. At pharmacological doses, it is prescribed to lower LDL ('bad') cholesterol, total cholesterol, and triglycerides, while simultaneously increasing HDL ('good') cholesterol. This makes it a powerful agent for cardiovascular support. However, its use is often limited by the 'niacin flush', a temporary and harmless sensation of redness, warmth, itching, or tingling due to vasodilation.
Pros
  • Highly effective at improving cholesterol and triglyceride levels
  • Strong evidence for cardiovascular benefits
  • Increases beneficial HDL cholesterol
Cons
  • Causes the 'niacin flush' (redness, itching, warmth)
  • Potential for liver toxicity at very high doses
  • Can interact with certain medications and raise blood sugar
Per product
Avg$38.24
Med$29.99
Per serving
Avg$0.96
Med$0.68
Per 10 mg
Avg$0.22
Med$0.12
Price distribution
Inositol Hexanicotinate (63)80
Inositol Hexanicotinate (IHN), often called 'no-flush niacin', is a compound where six molecules of nicotinic acid are esterified to one molecule of inositol. This structure allows for a gradual release of niacin into the bloodstream, which significantly reduces or eliminates the characteristic 'niacin flush' associated with immediate-release nicotinic acid. It aims to provide the metabolic benefits of niacin without the uncomfortable side effects, though its lipid-modifying effects may be less potent than pure nicotinic acid.
Pros
  • Significantly reduces or eliminates the 'niacin flush'
  • Provides niacin benefits for general health and metabolism
  • Generally well-tolerated
Cons
  • May be less effective than immediate-release nicotinic acid for potent cholesterol lowering
  • Higher cost compared to basic niacin
  • Some individuals may still experience mild flushing at very high doses
Per product
Avg$34.37
Med$29.91
Per serving
Avg$0.80
Med$0.66
Per 100 mg
Avg$1.44
Med$0.62
Price distribution
Niacinamide Ascorbate (19)78
Niacinamide Ascorbate is a salt formed by combining niacinamide and ascorbic acid (Vitamin C). This compound aims to deliver the metabolic and skin health benefits of niacinamide, along with the powerful antioxidant and immune-supporting properties of Vitamin C. As it contains niacinamide, it is a non-flushing form of B3. This combination can be particularly beneficial for holistic skin health and cellular protection.
Pros
  • Provides two essential vitamins in one compound
  • Non-flushing form of B3
  • Offers antioxidant support from Vitamin C
  • Beneficial for skin health and collagen production
Cons
  • Specific research on this combined compound is less extensive than on individual vitamins
  • May be more expensive than separate supplements
  • Dosing may be less flexible if specific high doses of one vitamin are needed
Per product
Avg$31.96
Med$28.99
Per serving
Avg$0.80
Med$0.59
Per 10 mg
Avg$0.06
Med$0.05
Price distribution
Nicotinic Acid (17)85
Nicotinic Acid is the scientific name for the form of Vitamin B3 commonly known as niacin. It serves as a precursor to NAD and NADP, coenzymes vital for cellular energy production. Therapeutically, at higher doses, nicotinic acid is highly effective in improving blood lipid profiles by lowering LDL cholesterol and triglycerides, and significantly increasing HDL cholesterol. This powerful action contributes to its role in preventing cardiovascular disease, despite the common 'niacin flush' side effect.
Pros
  • Potent effects on improving blood lipid profiles (lowers LDL, raises HDL)
  • Established benefits for reducing cardiovascular risk
  • Essential for energy metabolism
Cons
  • Consistently causes the 'niacin flush' (redness, itching, warmth)
  • Risk of liver toxicity at high doses, especially with sustained-release forms
  • Can temporarily increase blood glucose levels
Per product
Avg$21.09
Med$20.23
Per serving
Avg$0.34
Med$0.22
Per 100 mg
Avg$0.12
Med$0.09
Price distribution
Inositol Hexaniacinate (13)80
Inositol Hexaniacinate is chemically identical to Inositol Hexanicotinate, a complex formed by binding six niacin molecules to an inositol molecule. This 'no-flush' niacin is formulated to hydrolyze slowly in the body, ensuring a gradual release of niacin. This controlled release significantly reduces or prevents the uncomfortable vasodilation (flush) typically associated with immediate-release nicotinic acid, while still providing the essential metabolic benefits of Vitamin B3.
Pros
  • Effectively reduces or eliminates the 'niacin flush'
  • Provides the benefits of niacin for general health and metabolism
  • Generally well-tolerated by most individuals
Cons
  • May have a less pronounced effect on lipid profiles compared to immediate-release nicotinic acid at equivalent doses
  • Often more costly than standard niacin supplements
  • Very high doses might still cause mild flushing in sensitive individuals
Per product
Avg$47.39
Med$30.80
Per serving
Avg$0.83
Med$0.80
Per 100 mg
Avg$2.23
Med$0.84
Price distribution
Organic Food Blend (12)88
When niacin is obtained from an 'Organic Food Blend', it means the vitamin is naturally present within a mix of organically grown fruits, vegetables, grains, or other plant-based ingredients. This approach aligns with consuming nutrients in their whole-food context, which can enhance absorption and utilization due to the presence of natural co-factors, fiber, and other beneficial compounds. The specific form of niacin (nicotinic acid or niacinamide) within the blend depends on the natural composition of the food sources.
Pros
  • Natural and holistic source of niacin
  • Often includes other beneficial vitamins, minerals, and antioxidants
  • Good bioavailability from food matrix
  • Generally well-tolerated
Cons
  • Niacin concentration may be lower and less precise than isolated forms
  • Difficult to achieve high therapeutic doses for specific conditions (e.g., severe dyslipidemia)
  • Allergies or sensitivities to specific blend ingredients are possible
Per product
Avg$39.26
Med$36.20
Per serving
Avg$0.86
Med$0.86
Per 10 mg
Avg$0.46
Med$0.44
Price distribution
Nicotinamide (5)92
Nicotinamide Adenine Dinucleotide (NAD+) and its reduced form NADH are ubiquitous coenzymes in all living cells, derived from Vitamin B3 (niacin). NAD+ is essential for over 400 enzymatic reactions, primarily acting as a crucial electron acceptor in metabolic pathways like glycolysis and the citric acid cycle, driving ATP production. Beyond energy metabolism, NAD+ is vital for DNA repair, gene expression regulation (via sirtuins), and cell signaling, playing a key role in cellular aging and resilience.
Pros
  • Directly involved in cellular energy production (ATP)
  • Crucial for DNA repair and maintenance
  • Supports healthy aging and cellular longevity pathways (sirtuins)
  • Fundamental to numerous metabolic processes
Cons
  • NAD+ itself has poor bioavailability as a supplement; supplementation usually involves precursors like NMN or NR
  • Direct NAD+ IV treatments can be costly and are not widely accessible for oral supplementation
Per product
Avg$10.34
Med$11.00
Per serving
Avg$0.29
Med$0.30
Per 10 mg
Avg$0.18
Med$0.20
Price distribution
S. cerevisiae (5)87
Saccharomyces cerevisiae, commonly known as brewer's yeast or nutritional yeast, is a rich natural source of B vitamins, including niacin. When niacin is obtained from S. cerevisiae, it is present in a food-matrix form, which typically enhances its bioavailability and absorption within the body. Yeast naturally synthesizes and concentrates B vitamins, providing them in a readily recognizable and utilized form for human physiology, along with other beneficial compounds found in yeast.
Pros
  • Natural and bioavailable source of niacin
  • Often rich in other B vitamins and micronutrients
  • Generally well-tolerated and digestible
  • Sustainable and widely available source
Cons
  • Niacin content can vary and may be lower than isolated synthetic forms
  • Not suitable for achieving very high therapeutic doses
  • Individuals with yeast allergies or sensitivities should avoid
Per product
Avg$43.87
Med$38.24
Per serving
Avg$0.34
Med$0.34
Per 10 mg
Avg$0.04
Med$0.04
Price distribution