TruSkin's best-selling serum intentionally pairs this respected antioxidant with three of skin's best buds—Vitamin E, Hyaluronic Acid, and MSM. We can’t quite promise this high-end product is the fountain of youth in a bottle, but fans swear that it comes very close.

Barbara Sturm has grown a cult following thanks to the efficacy of her products, including this fan-favorite serum. I added this to my skincare routine a few months back and since then, my blemishes have decreased and my face has more of a glow. Niacinamide, also known as Vitamin B3 or Nicotinamide, is a high-performing, potent antioxidant known for addressing a wide range of skin issues.It combines the benefits of the coenzyme Q10 and vitamin C—two ingredients that help eradicate wrinkles. It’s a lot gentler than many formulas (it contains only 5% vitamin C), so this is a great option for sensitive skin.

Other key ingredients include moisture-retaining, skin-plumping hyaluronic acid, and MSM (or methylsulfonylmethane), an organic sulfur compound that acts as a powerful anti-inflammatory. Finally, in the correct concentration, vitamin C is reported to reduce hyperpigmentation from ageing or sunspots. Within the Hyaluronic Acid Serum, Vitamins C and E work with jojoba oil and aloe to boost the moisturizing and hydrating properties of Hyaluronic acid. The vegan-friendly serum is loaded with AHA (a natural glycolic acid) to brighten skin and reduce hyperpigmentation over time.It has a small ingredient list, but it’s definitely on the stronger side—a word of caution if you have super-sensitive skin. There are a lot of serums out there, from eyelash serum to hyaluronic acid serum to anti-aging face serum. The Ordinary is known for its no-nonsense approach to the science of skincare plus no-frills packaging. As we mentioned earlier, this single product has received over 8,000 reviews, and still has a rating of 4.

The strong concentration of vitamin C makes this serum effective for tackling dark spots and hyperpigmentation, as well as improving overall skin tone and texture.

The product melted into the skin pretty quickly, leaving behind a smoothed-out base perfect for makeup. Cassia angustifoliais seed polysaccharide is a plant-based botanical alternative to hyaluronic acid.