Hazelnut oil is derived from the nuts of the hazel tree and is known for its moisturizing and nourishing properties. In cosmetics, it is often used for its:

1. Moisturizing properties: Hazelnut oil is a natural emollient that can help to keep the skin hydrated and soft.
2. Non-comedogenic properties: Hazelnut oil is non-comedogenic, which means it doesn’t clog pores, making it a great oil for acne-prone skin.
3. Rich in fatty acids: Hazelnut oil is rich in oleic acid, linoleic acid, and palmitic acid, which are essential fatty acids that are beneficial for the skin.
4. Emollient properties: Hazelnut oil is also used as an emollient in cosmetics, it helps to smooth and soften the skin.
5. Antioxidant properties: Hazelnut oil contains Vitamin E which is an antioxidant, it can help to protect the skin from damage caused by free radicals, which can lead to premature aging.
6. Hair care properties: Hazelnut oil is also used in hair care products as it is helpful in promoting hair growth, reducing dandruff and itchy scalp.
7. Lightweight and easily absorbed: Hazelnut oil is lightweight and easily absorbed by the skin, making it a great carrier oil for essential oils and other active ingredients in cosmetics.
8. Hazelnut oil is also safe for most skin types, but it is always advisable to test it before applying to the face.