Skincare has evolved dramatically over the last decade, and one ingredient that continues to dominate the beauty world is **Niacinamide**. Often referred to as **Vitamin B3**, Niacinamide has become a must-have in face serums for those who want healthier, clearer, and more youthful skin. If you’re curious about why dermatologists, influencers, and skincare enthusiasts swear by it, this detailed guide covers everything you need to know — from **benefits and usage** to **side effects and precautions**. ## What is Niacinamide? Niacinamide is a water-soluble form of Vitamin B3. It is an essential nutrient for the body that supports cellular health, improves energy metabolism, and plays a vital role in skin repair. When applied topically through serums or creams, Niacinamide delivers multiple benefits, making it one of the most versatile skincare ingredients available today. Unlike stronger acids such as glycolic or salicylic acid, Niacinamide is gener...