Ulta The Ordinary  Retinol 0.5% In Squalane Intermediate Retinol Serum

The Ordinary's Retinol 0.5% in Squalane Serum is a water-free formula containing 0.5% retinol. This oil-like serum (anhydrous) is great for experienced users of pure retinol products looking for solutions for textural irregularities and signs of aging.