The Circadia MeriStem Serum Antioxidant Serum is a lightweight, botanically driven serum formulated to visibly firm skin, smooth fine lines, and shield against daily environmental stress. Circadia has long been rooted in chronobiology and professional-grade skin science, and MeriStem reflects that same commitment to ingredients that work with the skin rather than against it.

Key Benefits

Visibly Firms and Lifts Cyclotetrapeptide-24 Aminocyclohexane Carboxylate, a peptide complex clinically shown to improve skin firmness and reduce the appearance of sagging, targets the structural changes that come with early aging.

Protects Against Environmental Damage Edelweiss meristem cell culture (Leontopodium Alpinum Meristem Cell Culture) delivers concentrated antioxidant activity, helping neutralize free radicals triggered by UV exposure and pollution before they can accelerate visible aging.

Supports Skin's Own Renewal Signals Malus Domestica Fruit Cell Culture Extract, derived from a rare Swiss apple, helps protect the skin's longevity by supporting cellular vitality and reducing the look of fine lines over time.

Reinforces the Skin Barrier Against Stress Ectoin, a natural extremolyte found in organisms that survive harsh environments, forms a protective shield around skin cells, helping reduce sensitivity and fortify the barrier against environmental aggressors.

Replenishes and Smooths Aloe barbadensis leaf juice and glycerin work together to draw moisture into the skin and keep it there, leaving skin feeling comfortable, soft, and balanced throughout the day.

If your skin is showing early signs of aging, such as fine lines, loss of firmness, or a dull, depleted appearance, the Circadia MeriStem Serum Antioxidant Serum gives you a targeted way to address those changes without overwhelming your skin. It is particularly well-suited for those who want meaningful anti-aging results but need a formula gentle enough to use twice daily without irritation.

Sensitive skin types, including those who have struggled to tolerate more aggressive actives like retinol or acids, will find this serum easy to incorporate into an existing routine. It is also a strong fit for mature skin that has become more reactive over time and needs a protective, restorative approach rather than a harsh one.

This serum fits seamlessly into any morning or evening routine and works across all skin types. Whether you are building your first age-management routine or adding a targeted antioxidant step to an established regimen, the MeriStem Serum earns its place in the lineup.

If your skin leans sensitive or reactive, try applying the MeriStem Serum as the first active step after cleansing, before any other serums or treatments. The ectoin in the formula helps buffer the skin against irritation, which can make the rest of your routine feel more comfortable and perform more effectively.

Prepare: Apply to clean, dry skin on the face, neck, and décolleté.

Apply: Dispense a small amount and spread evenly across the treatment area.

Technique: Press gently into the skin rather than rubbing to encourage absorption.

Frequency: Use morning and evening for best results. Follow with your preferred moisturizer.