When it comes to choosing between vitamin C and niacinamide, both are beneficial for the skin. Vitamin C is an antioxidant that helps fight off free radicals, reduce wrinkles and dark spots, and even out skin tone. Niacinamide is a form of vitamin B3 which works to brighten skin, improve texture, control oil production, and reduce redness or inflammation in the skin. Ultimately it depends on your individual skincare needs as to which one you should use - if you're looking for anti-aging benefits then vitamin C would be more suitable whereas those with acne-prone or sensitive skin may prefer niacinamide since it's less irritating.