An essential B vitamin that helps turn food into cellular energy, repair skin, and support nerves.
What it is
Vitamin B3 (niacin) is a water-soluble vitamin that your body needs every day. Supplement formulas use nicotinamide, a gentle form of B3 that does not cause skin flushing. Niacin acts as a building block for key energy molecules (NAD+) that fuel cellular repair and daily metabolism.
Also known as: Niacinamide, Nicotinamide, Vitamin B3
Key benefits
- Converts carbohydrates, fats, and proteins into usable daily cellular energy.
- Supports skin hydration and maintains a strong, smooth skin barrier.
- Promotes healthy nervous system function, helping you stay sharp.
- Assists natural cell maintenance and DNA repair processes.
Amplified by probiotics
Vitamin B3 works hand in hand with friendly gut bacteria. Certain probiotic strains can produce additional B vitamins in your gut. At the same time, niacin supports the cells lining your bowel wall, encouraging a calm gut environment where probiotics can flourish.
Typical dose
16–50 mg/day
The evidence
Evidence: strongClinical data confirms that vitamin B3 is vital for cellular energy release, DNA maintenance, and healthy skin (Kirkland 2012, Mutat Res; Bogan & Brenner 2008, Annu Rev Nutr).
Safety & who should check first
Highly safe at standard supplement doses. Standard upper limits are set to avoid skin flushing. Safe during pregnancy and breastfeeding within recommended daily amounts.