Retinoids are a prescription-grade form of Vitamin A. It is stronger than over the counter retinol. This is because retinoic acid is the pure ingredient that takes effect on the skin. Retinol needs to convert to retinoic acid to take effect on the skin, compare this to retinoids which are a form of retinoic acid so it takes immediate effect. We have detailed the difference between the two retinoids here, if you’re interested in some more information
