Vitamin B3 (Niacinamide)
Niacinamide, also known as nicotinamide, is the non-flushing form of vitamin B3—an essential water-soluble vitamin involved in energy metabolism, DNA repair, and skin health. Unlike niacin (another form of vitamin B3), niacinamide does not cause skin flushing, which is why it is widely used in both dermatology and dietary supplements.
At a cellular level, niacinamide plays a central role in maintaining energy production, supporting skin barrier integrity, and regulating inflammatory responses.
What Is Niacinamide?
Niacinamide is one of two main forms of vitamin B3, the other being niacin (nicotinic acid). It is essential for the production of key coenzymes:
- NAD⁺ (nicotinamide adenine dinucleotide)
- NADP⁺ (nicotinamide adenine dinucleotide phosphate)
These molecules are critical for:
- Cellular energy production (ATP synthesis)
- DNA repair processes
- Redox balance (oxidation-reduction reactions)
- Mitochondrial function
Because the body cannot produce enough vitamin B3 on its own, it must be obtained through diet or supplementation.
Food sources include meat, fish, poultry, eggs, nuts, legumes, and fortified grains.
Traditional and Modern Uses
Vitamin B3 has long been recognized for its importance in preventing deficiency-related conditions and supporting general health.
Modern uses of niacinamide include:
- Skin barrier repair and hydration support
- Acne and inflammation management (topical use)
- Nutritional support for energy metabolism
- Support of healthy lipid and glucose metabolism
- Prevention of vitamin B3 deficiency (pellagra)
In skincare, niacinamide has become one of the most widely used active ingredients due to its versatility and tolerability.
Key Biological Functions
Cellular Energy Production
Niacinamide is essential for NAD⁺ and NADP⁺ synthesis, which are required for ATP production and overall cellular energy metabolism.
Skin Barrier Support
Topical niacinamide supports ceramide production, helping strengthen the skin barrier, reduce moisture loss, and improve hydration.
Anti-Inflammatory Activity
Niacinamide helps modulate inflammatory signaling in the skin, supporting conditions such as acne, redness, and sensitivity.
DNA Repair and Cellular Maintenance
Through NAD⁺-dependent pathways, niacinamide supports DNA repair and cellular resilience against oxidative stress.
Potential Health Benefits
Skin Health
- Improves skin hydration and barrier function
- Helps reduce hyperpigmentation and uneven skin tone
- Supports smoother texture and reduced appearance of fine lines
- Helps calm acne-related inflammation and redness
Cellular and Metabolic Support
- Supports energy production at the cellular level
- Plays a role in DNA repair mechanisms
- Contributes to healthy metabolic function
Anti-Aging and Antioxidant Support
- Supports NAD⁺ levels involved in cellular longevity pathways
- Helps reduce oxidative stress in skin and tissues
- Supports overall cellular resilience
What Does the Research Say?
Clinical and dermatological research shows that niacinamide may:
- Improve skin barrier function and reduce transepidermal water loss
- Reduce hyperpigmentation and uneven skin tone
- Improve acne severity and inflammation in topical applications
- Support NAD⁺-dependent energy metabolism and cellular repair processes
- Help prevent and treat vitamin B3 deficiency (pellagra)
Topical niacinamide is one of the most well-studied cosmetic ingredients in dermatology, while oral supplementation is primarily used for nutritional support and metabolic health.
Forms Used in Supplements and Skincare
Niacinamide is available in multiple forms depending on use:
- Oral capsules or tablets – nutritional support for vitamin B3 intake
- Topical serums and creams (2–10%) – skincare formulations for barrier and tone improvement
- Combination formulations – often paired with zinc, hyaluronic acid, or antioxidants
Niacinamide is often preferred over niacin in supplements and skincare because it does not cause flushing.
Safety and Considerations
Niacinamide is generally considered safe and well tolerated.
Key considerations include:
- Topical use is typically non-irritating and suitable for most skin types
- Oral supplementation is safe at recommended levels
- Very high oral doses should be used under medical supervision
- Individuals with liver conditions or on certain medications should consult a healthcare professional before high-dose use
When used appropriately, niacinamide is regarded as a highly versatile and well-studied nutrient for both skin and systemic health support.