Avocado (Persea Americana) – Rich in vitamins A, D and E, avocado oil encourages collagen production and reduces signs of ageing. This oil is also a good source of sterolins, which can soften skin and reduce the frequency of age spots. Avocado is an effective natural moisture and is often used to treat eczema, wounds and solar keratosis. Originating from Puebla in Mexico, avocado has long been cultivated in South and Central America. Avocado oil is beneficial for dry and itchy skin, and because it promotes the production of collagen, it also inhibits the ageing process.