One of the most notable compounds found in rosehips is vitamin C, which is a potent antioxidant that can help to protect the skin from damage caused by free radicals. Free radicals are unstable molecules that can damage cells and contribute to the aging process. Vitamin C can also help to stimulate collagen production in the skin, which is a protein that helps to keep the skin firm and youthful.

Rosehips also contain beta-carotene, which is a type of plant pigment that can be converted into vitamin A in the body. Vitamin A is important for healthy skin, as it helps to maintain the integrity of the skin's barrier function and can also help to reduce inflammation.

In addition to vitamin C and beta-carotene, rosehips also contain essential fatty acids, such as linoleic acid and linolenic acid. These fatty acids are important for maintaining the health of the skin and can help to improve the appearance of dry, damaged, or aging skin.