What is Vitamin C? The Multi-Tasker Your Skin Will Love

Yes. Vitamin C is a powerful antioxidant that helps protect skin from everyday stressors like sunlight and pollution. Different forms vary in strength, so choose a formulation suited to your skin type.

Vitamin C strengthens the skin’s natural defenses and supports collagen, keeping skin smooth and firm. It brightens dullness, evens skin tone, and reduces the appearance of fine lines. When used with sunscreen, it also helps protect skin from environmental damage.

While Vitamin C is often formulated for once-daily use, SEKKISEI features a stabilized form that is both gentle and effective, making it suitable for morning and evening application. With consistent twice-daily use, it helps support skin clarity, boost radiance, and promote a beautifully even-looking complexion.

Yes. Vitamin C works beautifully with hydrating ingredients like hyaluronic acid, and antioxidants such as Vitamin E. Some stronger actives may increase sensitivity if used at the same time.

Disclaimer: For use in tandem with your current skincare routine, please consult with your dermatologist.

Vitamin C is ideal for anyone who wants brighter, more even-toned skin and wants to protect their skin from daily environmental stress. It is a lovely addition to any routine focused on healthy, radiant skin.

Yes. Sensitive skin can enjoy the benefits of Vitamin C, especially in gentle, stabilized forms that are less likely to cause irritation. Start slowly and try a patch test first for comfort.

Most Vitamin C products are used once daily. If your skin is sensitive, start every other day and gradually increase use as your skin becomes accustomed.

Pure Vitamin C is highly effective but can be unstable, losing strength when exposed to air or light. Ascorbyl Glucoside is a gentle, stabilized form that lasts longer in the skin and converts into active Vitamin C after application. SEKKISEI formulas use Ascorbyl Glucoside, ensuring a more stable, skin-friendly delivery of Vitamin C for lasting benefits.

Yes. Vitamin C can oxidize over time, which may reduce its effectiveness. Choosing stabilized forms, like SEKKISEI’s Ascorbyl Glucoside, and well-packaged products helps maintain its benefits for longer.

• Timmons, J. (2022, January 28). How Ascorbyl Glucoside Can Benefit Your Skin. Healthline. https://www.healthline.com/health/ascorbyl-glucoside
• Elle MacLeman. (2022, December 17). Vitamin C: The Complete Guide To Vitamin C Everything You Need To Know About This Miraculous Little Ingredient - The Dermatology Review. The Dermatology Review. https://thedermreview.com/the-benefits-of-vitamin-c
• The Ordinary. (2025, April 8). Understanding Vitamin C in Skincare: The Science and Your Skin. Theordinary.com; The Ordinary. https://www.theordinary.com/en-mo/skincare-guides/vitamin-c-guide.html
• Zitz, S. (2025, July 24). The Best Time to Use Vitamin C Serum, According to Dermatologists. Prevention. https://www.prevention.com/beauty/skin-care/a65478568/when-to-use-vitamin-c-serum
• Vitamin CG: the Antioxidant Skincare Ingredient – Garnier. (2025). Garnierusa.com. https://www.garnierusa.com/about-ingredients/vitamin-cg
• Fallon, B. (2025, April 4). What to Know About THD Ascorbate and Every Other Type of Vitamin C. NewBeauty. https://www.newbeauty.com/types-of-vitamin-c
• Paris, T. (2023, April 12). Vitamin C: All You Need to Know About This Active Ingredient. Typology Paris. https://us.typology.com/library/identity-sheet-vitamin-c-and-its-stable-derivatives