Who is this for? All skin types, particularly those concerned with ageing, blemish prone skin and uneven skin tone. How to use? Introduce Retinol slowly into your regime by using it every second night, then increasing the frequency each week until your skin can tolerate every evening. Applying directly onto your skin after cleansing or mix it into your recommended Environ vitamin A moisturiser. Retinol Serums have been formulated with high concentrations of vitamin A. They are designed to help normalise the appearance of skin abnormalities and damage, and in promoting healthy-looking skin eventually creating skin that looks truly reborn beautiful. Recommended to use after use of one bottle of the Skin EssentiA AVST Moisturiser. I suggest this to avoid a retinoid reaction. Avoid during pregnancy