Bio Oil Dry Skin Gel (200ml). Improves dry skin. Contains vitamins and essential oils. Helps the skin to retain moisture. Non-comedogenic. Dry skin is a common condition usually caused by insufficient oil production in the skin, causing the top layer of the skin to dry out. Dry skin can become flaky, itchy or even cracked which can lead to inflammation. Bio-Oil Dry Skin Gel is a revolutionary oil-based formula which has been clinically proven to significantly improve dry skin.