Senté Defense C Serum is a brightening and antioxidant vitamin C serum built for skin that needs both tone correction and genuine healing support. Powered by Tetrahexyldecyl Ascorbate, a stable oil-soluble form of vitamin C that penetrates more deeply than traditional formulas, alongside Senté's patented Heparan Sulfate Analog, it brightens dark spots, neutralizes daily environmental damage, and supports the skin's natural repair process in a single lightweight step. It works for all skin types, including those who have found conventional vitamin C serums too harsh or too unstable to trust.

Key Benefits

Brightens and Fades Dark Spots
Tetrahexyldecyl Ascorbate penetrates deeply to inhibit melanin production at the source, visibly fading sun damage, post-acne marks, and uneven tone over time.

Heals and Repairs
HSA supports the skin's natural cellular repair cycle, helping to reduce visible redness, calm reactive skin, and restore a healthier, more even-looking complexion alongside the vitamin C.

Antioxidant Defense Every Day
Neutralizes the free radical damage caused by UV exposure, pollution, and environmental stress that accumulates over time and accelerates visible aging.

Supports Collagen Production
Vitamin C is a key cofactor in collagen synthesis, helping to maintain firmness and reduce the appearance of fine lines with consistent daily use.

Stable and Skin-Friendly
Unlike L-ascorbic acid, Tetrahexyldecyl Ascorbate resists oxidation and does not cause the stinging or irritation that makes traditional vitamin C serums difficult to tolerate.

In a clinical 8 week study:

• 94% of subjects showed improvement in skin brightness
• 87% of subjects showed improvement in skin evenness
• 87% of subjects showed improvement in skin luminosity

*Data on file, Sente

Senté Defense C Serum is for anyone dealing with dullness, uneven skin tone, sun damage, or dark spots who wants real brightening results without the irritation that traditional vitamin C serums often bring. Because Tetrahexyldecyl Ascorbate is a stable, oil-soluble form of vitamin C, it suits sensitive, rosacea-prone, and reactive skin types that have struggled with standard ascorbic acid formulas.

Dry skin types especially love this serum for the deeply hydrating, luminous finish it leaves behind, giving skin a healthy, lit-from-within glow rather than the tight or stripped feeling that water-based vitamin C formulas can cause.

It works beautifully as a morning serum layered beneath SPF for daily antioxidant protection, and pairs seamlessly with the rest of the Senté lineup for anyone focused on both brightening and long-term prevention.

Apply Sente Defense C Serum every morning before SPF for maximum antioxidant benefit. Because IAA is stable and non-irritating, you can comfortably layer it with niacinamide, peptides, and even prescription actives without the reactivity that traditional L-ascorbic acid formulas sometimes cause.

Prepare: Apply to clean, dry skin in the morning after cleansing and toning.

Apply: Dispense 3 to 5 drops into your palm or fingertips and gently press the serum into the face, neck, and upper chest.

Technique: Pat gently rather than rubbing to preserve the serum's integrity and encourage even absorption. Allow 30 to 60 seconds to absorb before applying the next step.

Frequency: Use every morning as part of your AM routine. Follow with a moisturizer and a broad-spectrum SPF of 30 or higher to maximize antioxidant protection throughout the day.