What is it? Oleus is a collection of the latest and greatest premium oils and serums of the highest quality, offering maximum efficacy. The Oleus Retinoid Serum provides daily support for dehydrated and mature skin; the lightweight serum encourages a youthful, smooth complexion.Daily Support for Dehydrated and Mature Skin Healthy Aging Serum Suitable for Vegans What Are the Benefits of This Serum? Oleus Retinoid Serum is a natural lightweight serum that is known for aiding collagen production and to encourage a youthful looking complexion. Retinoid is a derivative of Vitamin A and helps to reduce the appearance of fine lines and wrinkles as well as evening out skin tone. This healthy-aging serum can be used on its own, mixed to create super blends or combined with the Oleus oil free moisturiser to create a product which suits your needs.