Niacinamide is the one skincare active that gets an A+ from us. After gaining popularity in 2021, this all-star has quickly become a holy grail for tackling many common skin issues like acne, fine lines, and dark spots. Also known as nicotinamide, it is a water-soluble form of vitamin B3 that is anti-inflammatory, and has antioxidant and skin-brightening benefits as well. Pro tip: It also has the ability to strengthen your skin barrier minus any irritation or sensitivity – we recommend choosing a serum for best results!