12,077+ Customers who love C Forte
Combat Fine Lines & Pigmentation with C Forte
Our C Forte is one of the strongest Vitamin C (also known as Ascorbic Acid) serums on the market!
- Evidence based ingredient Ascorbic Acid for rebuilding collagen
- Anti-Ageing serum for ages 30+
- Proven to reduce pigmentation
- Proven to reduce fine lines and wrinkles
As seen in
Wake Up to Visibly Younger-Looking Skin
Aging doesn’t have to show on your skin. Fine lines, wrinkles, and loss of firmness can be reversed with a solution that’s backed by science.
Our potent 16% Ascorbic Acid formula is a game-changer in skincare. Powered by the purest form of Vitamin C, a clinically proven antioxidant, this powerhouse is designed to:
Gentle yet powerful, it's the evidence-based skincare solution you've been waiting for.
START YOUR DAY WITH C FORTE &BOOST YOUR SKIN’S DEFENSE WITH CLINICALLY-PROVEN VITAMIN C
Smoother. Brighter. Stronger.
91%
of ESK Vitamin C users noticed a difference in pigmentation, crow’s feet, fine lines, hydration / over all skin brightness*
What is Ascorbic Acid?
The purest form of Vitamin C that transforms your skin
Our founder
Dr. Ginni Mansberg
Ascorbic acid, the purest form of Vitamin C, is a powerhouse ingredient with clinically proven benefits. It neutralizes free radicals, boosts collagen production, and combats pigmentation by inhibiting melanin production. Paired with Vitamin E and ferulic acid in our C Forte formula, it delivers maximum results—protecting against environmental damage while improving skin texture and tone.
Special offers for you
Product Details and FAQs
C Forte is a high-potency Vitamin C serum formulated with 16% L-Ascorbic Acid, Ferulic Acid, and Vitamin E. This powerhouse combination turbocharges results, brightening skin, boosting collagen, and protecting against environmental damage.
C Forte is best for normal to dry skin types concerned with anti-aging, pigmentation, and sun damage. It is not suitable for sensitive or acne-prone skin due to its high potency.
Apply C Forte in the morning after cleansing. Follow with a moisturizer and SPF for optimal protection and results.
C Forte is designed to target:
- Anti-aging concerns (reducing fine lines and wrinkles)
- Boosting collagen production
- Reducing pigmentation and sunspots
- Hydrating and softening the skin
- Enhancing skin’s brightness and tone
L-Ascorbic Acid is the most potent form of Vitamin C. It delivers visible results by brightening skin, reducing pigmentation, and boosting collagen. In C Forte, it’s combined with Ferulic Acid and Vitamin E, which stabilize and amplify its effects, giving you maximum benefits.
C Forte’s unique combination of 16% L-Ascorbic Acid, Ferulic Acid, and Vitamin E offers unmatched potency and stability. Its water-free formula ensures the Vitamin C stays effective over time without oxidizing.
Yes, C Forte has a distinct smoky smell, which is normal for Ferulic acid. Ferulic acid increases the effectiveness of Vitamin C.
Absolutely. Vitamin C reduces pigmentation and dark spots by inhibiting melanin production and improving skin tone over time.
Yes! For a complete routine:
- In the morning, pair C Forte with Enlighten (Vitamin B3 and 4n-butylresorcinol cream) for brightening and pigmentation control, followed by Zinc Shade SPF for sun protection.
- At night, use one of our Ultimate A retinal products for enhanced anti-aging and skin-renewing benefits.
Yes, C Forte is safe to use during pregnancy and breastfeeding. It’s an excellent way to maintain healthy, glowing skin.
Special Offers For You
The ESK Promise
- Evidence based ingredients
- Free check-in call
- Money back guarantee