John Jeff 10% Prototypical Vitamin C Serum – High-Potency Antioxidant & Brightening Treatment

Revitalize your complexion and defend against environmental stressors with the John Jeff 10% Vitamin C Serum. This high-potency formula leverages pure L-ascorbic acid (Prototypical VC) to target stubborn dullness, uneven skin tone, and the visible signs of photoaging. Engineered with a specialized stabilized delivery system, this serum ensures that the active ingredients remain potent, providing your skin with a radiant, youthful glow and professional-grade antioxidant protection.

Key Benefits

32% Antioxidant Boost:** Scientifically validated to reduce reactive oxygen species (ROS) by 32%, providing a powerful shield against the oxidative stress that leads to premature aging.

Advanced Brightening & Anti-Yellowing:** Specifically formulated to combat sallow skin tones and "yellowing," restoring a clear and luminous complexion.

Photoaging Defense:** Helps mitigate the structural damage caused by UV exposure, assisting the skin in maintaining its elasticity and smooth texture.

Innovative Dual-Phase Stability:** Utilizes a sophisticated water-oil separation system. The oil phase acts as a physical barrier to isolate the Vitamin C from oxygen, significantly slowing down the oxidation process.

Enhanced Alcohol-Soluble Formula:** The 10% concentration is optimized for better solubility and skin penetration, ensuring the Vitamin C remains active and effective throughout its shelf life.

Key Specs

Active Ingredient:** 10% Prototypical Vitamin C (L-Ascorbic Acid).

Format:** Bi-phase water-oil serum.

Available Sizes:** 15ml and 30ml.

Target Concerns:** Skin oxidation, dullness, yellowing, and light-induced aging.

How to Use

To ensure maximum efficacy and stability, please follow these specific application steps:

1. **Shake Well:** Because of the unique water-oil separation system, you must shake the bottle thoroughly before every use to ensure the phases are perfectly blended.

2. **Dry Application:** After cleansing, ensure both your hands and your face are completely dry. Apply an appropriate amount of serum to the skin.

3. **Absorption:** Gently massage the serum into the skin until fully absorbed.

4. **Sun Protection:** Always follow with a broad-spectrum sunscreen during the day, as Vitamin C works best when protected from direct UV light.

Care & Safety

Temperature Sensitivity:** This high-activity VC system is sensitive to heat. In temperatures between 30°C and 40°C, the serum may oxidize and turn yellow more rapidly.

Summer Storage:** During the summer or in hot climates, it is strongly recommended to store the serum in the refrigerator, even if the bottle is unopened.

Seasonal Storage:** Refrigeration is generally not required during the cooler spring, autumn, and winter seasons.

Usage Timeline:** If you do not have access to a refrigerator during summer, please aim to finish the 15ml bottle within 1 month or the 30ml bottle within 2 months of opening.

Notes

"Water-oil separation slows down VC oxidation and maintains VC activity."