Niacinamide – or vitamin B3 – is essential to the proper functioning of the body. This molecule is multifunctional. In particular, it helps prevent the signs of aging, such as wrinkles and pigment spots. It also helps regulate sebum production in oily skin and reduce imperfections. Typically, well tolerated by all skin types, there might be contraindications and precautions to take when using a niacinamide skincare product.