This water-free solution contains 1% Retinol, a well-studied ingredient that aims to reduce the appearance of fine lines, wrinkles and textural irregularities. While Retinol has been studied extensively, it can be irritating to the skin for first-time users and requires a build up of skin tolerance. For this reason, we generally recommend using Granactive Retinoid 2% or Granactive Retinoid 5% for first-time users. This formula also offers hydrating benefits due to the presence of Squalane. The Ordinary's portfolio of retinoids includes the following formulations: - Granactive Retinoid 2% Emulsion (Moderate Strength, No Irritation) - Granactive Retinoid 2% in Squalane (Moderate Strength, No Irritation) - Granactive Retinoid 5% in Squalane (High Strength, No to Low Irritation) - Retinol 0.2% in Squalane (Low Strength, Moderate Irritation) - Retinol 0.5% in Squalane (Moderate Strength, High Irritation) - Retinol 1% in Squalane (High Strength, Very High Irritation)