When it comes to cosmetics, rosehip seed oil is one of best plant oils you can use on your skin. The seeds of the rosehip are cold pressed to extract all the oily goodness, which tends to have a red hue. Although rosehips grow in many parts of the world, the oil you can buy is extracted from the seeds that form in the hips of the wild rose of Chile. This oil is high in essential fatty acids and the naturally occurring form of Vitamin A (retinoic acid). These compounds smooth wrinkles by hydrating the skin and are thought to slow signs of ageing. Rosehip oil is one of the best oils to use for wrinkles and scarring.