The Ordinary Niacinamide 10% + Zinc 1% Serum is a top-rated skin care product on Amazon. It is a serum that helps to regulate sebum production and minimize the appearance of pores. The serum is formulated with niacinamide, which helps to reduce the production of excess oil and improve the skin's texture. It also contains zinc, which helps to balance the skin and reduce inflammation. The Ordinary Niacinamide 10% + Zinc 1% Serum is suitable for all skin types and is a great option for those looking to control oiliness and improve the overall appearance of their skin.