1. Niacinamide Is a Form Of Vitamin B3 An Essential Nutrient That Support Many Cellular Processes 2. Niacinamide is one of the two forms of vitamin B3 — the other being nicotinic acid. Vitamin B3 is also known as niacin. 3. Niacinamide and nicotinic acid both provide vitamin B3 activity, but they differ in chemical structure and how they affect your health. 4. When applied topically or taken orally as a supplement, niacinamide has been shown to have anti-inflammatory effects on the skin. 5. it’s a different form of vitamin B3 that is often included in cosmetic products because of its many potential skin-boosting benefits, including its ability to improve hyperpigmentation, visible signs of aging and acne.