The Role of Antioxidants in Aesthetic Medicine

Last updated: 9 August 2026

Antioxidants are fundamental to skin health and sit at the intersection of dermatology, nutrition science, and aesthetic medicine. Their ability to neutralise free radicals, unstable molecules that damage cellular structures, DNA, and proteins, makes them indispensable in both preventing and treating skin ageing. From topical serums to oral supplements and in-clinic infusion treatments, antioxidants are woven into virtually every evidence-based aesthetic protocol. Practitioners incorporate antioxidant strategies across all aspects of patient care.

Understanding oxidative stress and skin ageing

Oxidative stress occurs when the production of reactive oxygen species (ROS) exceeds the skin’s antioxidant defence capacity. Research by Rinnerthaler et al. (2015) in Biomolecules identified the key sources of ROS in skin: ultraviolet radiation (the primary extrinsic source), infrared radiation, visible light, air pollution, cigarette smoke, and normal metabolic processes within mitochondria.

The damage caused by uncontrolled ROS is extensive: lipid peroxidation of cell membranes, protein oxidation (including structural damage to collagen and elastin), DNA mutations that impair cellular function, and activation of matrix metalloproteinases that accelerate extracellular matrix degradation. This cascade of oxidative damage is now recognised as a primary driver of both intrinsic ageing and photoageing.

Key antioxidants in aesthetic practice

Vitamin c (ascorbic acid)

The most extensively studied topical antioxidant in dermatology. At concentrations of 15-20%, L-ascorbic acid provides significant photoprotection, stimulates collagen synthesis, and inhibits melanogenesis. The combination of vitamin C with vitamin E and ferulic acid (as studied by Lin et al., 2005, in the Journal of Investigative Dermatology) provides combined antioxidant protection that exceeds the sum of individual effects.

Vitamin E (Tocopherol)

A fat-soluble antioxidant that protects cell membranes from lipid peroxidation. Vitamin E works together with vitamin C, as vitamin C regenerates oxidised vitamin E, maintaining its active form.

Niacinamide (Vitamin B3)

A versatile antioxidant that enhances the skin’s own antioxidant defence systems. At concentrations of 4-5%, niacinamide has been shown to improve skin barrier function, reduce hyperpigmentation, decrease sebum production, and minimise pore appearance. Research by Bissett et al. (2005) in Dermatologic Surgery demonstrated significant improvements in multiple signs of ageing after 12 weeks of niacinamide application.

Resveratrol

A polyphenolic compound found in red grape skin, berries, and peanuts. Resveratrol activates sirtuin-1 (SIRT1), a longevity-associated enzyme that protects against cellular ageing. Topical resveratrol has demonstrated anti-inflammatory, antioxidant, and anti-proliferative properties relevant to skin ageing and photoprotection.

Coenzyme Q10 (Ubiquinone)

An essential component of the mitochondrial electron transport chain that also is a potent lipid-soluble antioxidant. Skin CoQ10 levels decline with age, and topical supplementation has been shown to reduce wrinkle depth and protect against UV-induced oxidative damage (Hoppe et al., 1999, BioFactors).

Ferulic Acid

A plant-derived antioxidant that stabilises and enhances the efficacy of vitamins C and E. The CE Ferulic combination has become one of the most well-evidenced antioxidant formulations in aesthetic practice, with published data showing doubling of photoprotective capacity compared to vitamins C and E alone.

Antioxidants in professional treatments

Beyond daily topical use, antioxidants are integrated into professional aesthetic treatments in several ways:

• Post-procedure applicationantioxidant serums applied after microneedling or laser treatments accelerate healing and reduce post-inflammatory hyperpigmentation
• Mesotherapy cocktailsinjectable vitamin C, glutathione, and other antioxidants delivered directly into the dermis
• LED therapy enhancementantioxidant application combined with red or NIR LED amplifies the anti-inflammatory and regenerative effects
• Pre-treatment optimisationantioxidant-rich skincare programmes preparing the skin for better treatment outcomes
• Glutathione treatmentsintravenous or mesotherapy glutathione, the body’s master antioxidant, for skin brightening and detoxification

Oral antioxidant supplementation

Dietary and supplemental antioxidants complement topical approaches. A systematic review by Dumoulin et al. (2019) in the British Journal of Dermatology found evidence supporting oral vitamin C, vitamin E, carotenoids, and polyphenols for improving skin resistance to UV damage and supporting overall skin health. A Mediterranean diet rich in fruits, vegetables, olive oil, and oily fish provides a broad spectrum of antioxidant compounds that support skin health from within.

Frequently asked questions

Do I need a separate antioxidant serum if my moisturiser contains antioxidants?

Generally yes. Moisturisers typically have lower antioxidant concentrations than dedicated serums. A vitamin C serum at 15-20% delivers significantly more protection than a moisturiser containing 1-3% vitamin C.

Can I use antioxidants with retinol?

Yes, they are complementary. Many dermatologists recommend vitamin C in the morning and retinol in the evening. Niacinamide pairs particularly well with retinoids, helping to reduce associated irritation.

Do antioxidants replace sunscreen?

No. Sunscreens block UV radiation whilst antioxidants neutralise free radicals generated despite sun protection. The two work together, using both provides significantly greater protection than either alone.

Which is the best antioxidant for anti-ageing?

Vitamin C has the strongest evidence base, but a multi-antioxidant approach, combining vitamin C with vitamin E, ferulic acid, and niacinamide, provides broader protection. Different antioxidants protect against different free radical types and work in different cellular compartments.