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Alternative Anti-AgingProducts with neem oil offer an alternative to synthetic anti-aging products, as the carotenoid content of neem lends it potentially protective qualities; according to a 2009 study published in ???Toxicology and Industrial Health,??? beta-carotene shields the skin against oxidative stress and ultraviolet radiation, helping reduce the signs of skin aging. Neem oil also contains vitamin C, a natural part of the skin's dermis and epidermis that features antioxidant properties and encourages collagen production. Like cartenoids, vitamin C helps prevent photodamage to the skin. Additionally, the fatty acids of neem oil serve as a moisturizer.Antiseptics for AcneNeem oil features antiseptic properties, which may help those suffering from acne. The plant contains quercetin, an antibacterial and anti-inflammatory flavonoid. Antibacterial agents help reduce acne in some cases, as pimples form due to the occurrence of bacteria in clogged follicles, which contributes to the creation of inflamed red pustules. Quercetin also serves as an antioxidant, which helps reduce membrane-damaging free radicals.Redness ReductionJust as quercetin may help reduce redness, neem oil features other anti-inflammatory components. Neem tree seeds, which produce neem oil, contain 28 liminoids -- chiefly nimbin and its derivatives. As reported by a 2009 study in the ???Journal of Oleo Science,??? these liminoids exhibit marked anti-inflammatory properties with almost no toxicity. Anti-inflammatory agents such as these can ease the appearance of redness on the skin.