Isdin ISDINCEUTICS Flavo-C Advanced Antioxidant Serum
ISDINCEUTICS® Flavo-C Advanced Antioxidant Serum
A 15% vitamin C serum built with a biphasic formula to keep the vitamin C stable until the moment you use it.
This advanced antioxidant serum is formulated with a Tri-Antiox Complex: three forms of vitamin C paired with three antioxidant boosters, including hinokitiol, designed to target nine visible signs of skin aging while optimizing stability, penetration, and performance. The biphasic format keeps the vitamin C protected from oxidation until the two phases are combined at the moment of use, so the formula reaches the skin at full potency rather than degraded from sitting exposed on a shelf. It works to visibly brighten, firm, and smooth skin, targeting dullness, uneven tone, and loss of firmness in one step. Suitable for daily use as part of a morning routine.
Why it works: Vitamin C is one of the most effective, well-researched antioxidants for skin, but it's also notoriously unstable. Most vitamin C serums begin oxidizing the moment they're opened, losing potency before you've used through the bottle. This formula is built specifically to solve that problem: keeping the vitamin C separated and stable until use, then combining three vitamin C forms with additional antioxidant boosters to extend its effectiveness once it's on the skin. That stability is what lets the serum deliver a genuinely potent 15% concentration instead of a diluted one designed to survive months on a shelf.
How to use it:
- Combine the two phases as directed and apply to clean, dry skin.
- Use outward, upward motions to massage in until fully absorbed.
- Apply each morning, before moisturizer and sunscreen.
- Use consistently; brightening and firming effects build with continued use.
The worth//vitality promise
We chose this serum because it solves the actual problem with vitamin C skincare: instability, rather than just claiming a high percentage on the label. A biphasic formula that keeps 15% vitamin C stable until use, backed by a Tri-Antiox Complex built for real penetration and performance, is the kind of formulation discipline we look for before an antioxidant serum earns its place in the lineup.