Rosehip oil is rich in vitamin A. Vitamin A is made up of several nutritional compounds, including retinoids. Retinoids are known for their ability to reduce hyperpigmentation and other visible signs of aging with regular use.Rosehip oil contains carotenoids, which help keep your skin fresh and healthy by creating new skin cells. Rosehip oil also contains vitamin F, which helps trap moisture in your skin and protect your skin against damage.