Pestle & Mortar Superstar+ Retinoid Night Oil Pro Strength is an advanced overnight treatment oil formulated with 1% Hydroxypinacolone Retinoate (HPR). Unlike traditional retinol, which must be converted to retinoic acid before it becomes active, HPR binds with retinoic acid receptors in the skin. This makes it much more potent and fast acting delivering results similar to professional strength products but with less irritation. This retinoid night oil is also blended with nourishing oils like tamanu, black cumin, and pomegranate seed oils to support and enhance the skin while delivery deep hydration. This Pestle & Mortar non-irritating retinoid is designed to visibly improve skin texture, reduce fine lines, and promote a more even complexion. If you are just starting out on your retinol journey we recommend beginning with the original Superstar.