How to Use Vitamin C Serum — COUI Skincare

Say Hello To Our 1, 2 Anti-aging Duo

Throw out your tired Vitamin C serums and make room for COUI. We’ve packed the highest concentration of pure Vitamin C into our serum to provide your skin with a power punch.

Used separately for your desired results:

  • One: Our Vitamin C 20% Serum provides a natural exfoliation for your skin.
  • Two: If you need to kick it up a notch our revolutionary Super C is a true anti-aging breakthrough. It’s secret weapon, Epidermal Growth Factor, is not found in any other Vitamin C serum on the market.
Keep reading to learn more.




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Each product is backed by 45 years of skincare research and is formulated to ensure every ingredient performs at its maximum level of potential.

  • How do I use vitamin C serum?

    Our vitamin C serum is suitable for all skin types. You can apply it during the day as part of your regular skin care routine, use it at night before you sleep, or both, up to two times per day. It is equally effective either way.

    Shake the bottle well. Make sure you use it sparingly—a little goes a long way. Use two fingertips and apply it gently to your face, patting it into place rather than rubbing.

  • Where can I buy vitamin C serum?

    You can purchase Vitamin C serum many places. However, you can only buy Super C from COUI. What makes Super C better?

    Super C combines vitamin C with collagen, marine kelp, hyaluronic acid, EGF and antioxidents which offer a powerful epidural growth factor. Our serum literally synthesizes new collagen. Your skin can use that synthesized collagen to rebuild itself and reverse the damage caused by daily living.

    Visit this link to learn more about how collagen can help you repair and replace dead skin cells.

  • What does vitamin C serum do?

    Vitamin C serum helps your skin in a variety of ways. It helps to reverse aging damage. Some users even start to see a reduction in the wrinkles around their eyes as the serum begins to tone and firm the skin.

    The active ingredients also help fight acne, rosacea, and other blemishes by giving your skin the basic building blocks it needs to remain healthy. What if the vitamin C serum doesn’t help me?

Most of our customers see and feel a significant difference in a very short period, even if other skin care products have never helped in the past.

  • My skin feels so soft and nice! I will never use another skin care product.

    I started seeing the results within a couple of weeks. I struggle with blemishes, but they haven’t given me any trouble since I started using Super C. And I can’t rave enough about how great my skin feels. This product is now an irreplaceable part of my daily routine. — Trish W.

  • My dermatologist recommended it, and I love it. Bye-bye, age spots and fine lines.

    I have a couple of skin problems, and I never really bought products to address them. I just assumed none of them worked. I was surprised when my doctor recommended Super C, but decided to give it a try. I’m really glad I did, because this stuff is phenomenal. — Jessica J.

And if you do love Super C, don’t forget to check out some of our other skin care products. You might just get a chance to enjoy the best skin you’ve ever had.

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