exponent
"was interesting but a little too powdery"
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a potent, pure 10% L-Ascorbic and Hyaluronic Acid serum that reduces fine lines, wrinkles, sunspots and pigmentation without irritation.
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Suitable for
All skin types, including dry, mature, blemish-prone, combination, and sensitive skin.
Why we stand behind it
Normally, antioxidants like Vitamin C degrade and oxidize when coming into contact with light, air, or water but this clinical-grade serum is activated fresh for peak potency.
Powderized pure Vitamin C is precisely dosed by a patented precision dispenser and seamlessly activated in your palm with a hyper-moisturizing Hyaluronic Acid. The result? A serum that delivers visible results in 1-2 weeks without irritation.
In clinical testing on this 10% pure Vitamin C (L-Ascorbic Acid), subjects screened for sensitive skin saw no irritation with excellent results:
- 100% of subjects had a decrease in fine lines and wrinkles in 1 week.
- 86% of subjects had an increase in firmness in 4 weeks.
- 66% of subjects had a decrease in discoloration and pigmentation and an increase in brightness and radiance in 4 weeks.
*Based on a clinical testing study with measured instrumentation of 28 subjects evaluated with a Visia Image Analysis Pro over 4 weeks.
Key ingredients
L-Ascorbic Acid: the pure form of Vitamin C, is an antioxidant that wards off oxidative stress and free radicals while promoting collagen production-- both preventing and reversing fine lines and wrinkles, sunspots, and discoloration for a brighter, more radiant complexion.
Hyaluronic Acid: this multi-weight formula penetrates multiple layers of skin to deeply hydrate, boost elasticity, plump and restore the skin from within, helping to smooth fine lines and wrinkles.
this product meets
The Credo Clean Standard™
Every product we offer meets our industry leading standards for safety and sustainability.
learn moreThis product is
Sustainable Packaging
Vegan
Gluten Free
Fragrance Free
Alcohol Free
Soy Free
Paraben Free
An undertone is the color beneath the surface of your skin, which never changes (even with a tan). There are three types of undertones:
Pink/Cool
I see red or pink undertones around the perimeter of my face and neck.
My skin burns easily, but barely tans.
My skin looks better in silver jewelry than gold.
Neutral
I see both pink and yellow undertones around the perimeter of my face and neck.
My skin sometimes burns and sometimes tans.
My skin looks good in both gold and silver jewelry.
Yellow/Warm
I see yellow or golden undertones around the perimeter of my face and neck.
My skin rarely burns, but tans easily.
My skin looks better in gold jewelry than silver.
Find your shade match
Take our 1 minute quiz and get matched to real people with your skin tone and type.
What's Included: Brightening Boost Vitamin C Active Powder Precision Dispenser and a Quadruple Hyaluronic Acid Serum Pump.
How to Use: After cleansing, apply serum.
1. Stamp Vitamin C Active Powder in palm for one precise dose (this keeps anti-aging ingredients at peak potency).
2. Pump one dose of Hyaluronic Acid; mix in palm (this activates powders into hydrating, silky serums).
3. Apply serum to face and neck.
Use every morning.
Pro-tip
Can be layered under a moisturizer or SPF.
We co-founded the nonprofit Pact to demystify how to recycle your beauty packaging empties and divert waste from landfills.
How to recycle your empties
1. Disassemble and clean all components
2. Pick the right disposal bin
3. Drop off your empties at your nearest Pact bin
1 Product Recycled = 10 Credo Rewards Points
create accountFounded by Liz Whitman, a beauty industry veteran of over 20 years, Exponent Beauty innovates on delivery systems to ensure high performing clinical skincare ingredients are at their highest concentration and efficacy. Born from the ageless esthetician practice of mixing fragile antioxidants fresh to preserve peak potency, Exponent’s anti-aging Activated Serum line fully protects antioxidants for clinical serums with visible results in 1-2 weeks. All of their products are dermatologist-recommended and clinically tested with measured instrumentation on sensitive skin for visible results without irritation. Exponent’s patented packaging is refillable to eliminate plastic waste earning the brand B-Corp certification and an award for sustainable packaging design. Exponent prides itself on giving consumers powerful, science-backed skincare solutions coupled with the magic of uniquely designed packaging experiences.
SHOP ALL Exponent BeautyOverall rating: 4.6666665 / 5 from 6 reviews.
Review topics: [].
"was interesting but a little too powdery"
— Jayoung Y. (3/5)
"Love that this minimizes use of extra packaging. Easy to swap in the refill."
— Lauren (5/5)
"One word: Radiance! Keep up the innovation and disrupt the "same old, lame old" beauty industry. Wonder if a 15% or 20% Vitamin C is in the works . . . ? I'd love that too!"
— Jana G. (5/5)
"I have been using Exponent's Vitamin C product for several months and have had fantastic results. I love the way the product dispenses and becomes activated upon being mixed with the serum. I feel I am getting the full capabilities of the Vitamin C as it has not been oxygenated over time, weakening it's properties. I use the Vitamin C product on a daily basis. My skin hasn't looked this good for many years. I highly recommend."
— Faith C. (5/5)
"This product makes so much sense. It’s easy to use and allows the vitamin C to be activated on the spot before being neutralized by air. I recommend highly as a simple serum before moisturizing."
— Carol H. (5/5)
"I like the exponent system the vitamin c powder mixes well with a few pumps of Hyaluronic acid or i mix with other serums."
— Rebecca S. (5/5)
We offer clean beauty vetted to the highest standard.
We want to know where ingredients come from and how they were made.
Clean beauty should include the just treatment of humans and animals.
We co-founded Pact to tackle beauty’s packaging waste problem.
a potent, pure 10% L-Ascorbic and Hyaluronic Acid serum that reduces fine lines, wrinkles, sunspots and pigmentation without irritation.
Exponent Beauty Alcohol Free antiaging combination skin dry skin Essentials Oils Fragrance Free Gluten Free hyperpigmentation mature skin normal skin oily skin Paraben Free refill refillable sensitive skin serums Shop By Concern_Acne & Blemishes Shop By Concern_Anti-Aging Shop By Concern_Dry Skin Shop By Concern_Hyperpigmentation Shop by Concern_Sensitive Skin Shop By Concern_Sun Protection Shop By Exclusive_Only at Credo Shop By Ingredient_Alcohol Free Shop By Ingredient_Fragrance Free Shop By Ingredient_Gluten Free Shop By Ingredient_Soy Free Shop By Ingredient_Vegan Shop By Ingredient_Vitamin C Shop by Packaging_Refillable Shop by Routine_Morning Shop By Size_Refill Shop By Skin Type_All Shop By Skin Type_Combination Shop By Skin Type_Dry Shop By Skin Type_Mature Shop By Skin Type_Normal Shop By Skin Type_Oily Shop By Skin Type_Sensitive skin care skin type all soy free Sustainable Packaging treatments Vegan vegan skincare add-to-cart //credobeauty.com/cdn/shop/files/Exponent_BrighteningBoostVitC_02_Swatch_cfd9ff9d-10fb-45ae-92e3-0096d2a37ea6.jpg?v=1761080979 //credobeauty.com/cdn/shop/files/Exponent_BrighteningBoostVitC_03_BA_94a1b97a-f3b0-4202-a01b-0e6a86222bfd.jpg?v=1761081004 //credobeauty.com/cdn/shop/files/Exponent_BrighteningBoostVitC_04_BA_1fe18eed-2862-4e99-8bad-cfe9cc40653a.jpg?v=1761080982 //credobeauty.com/cdn/shop/files/Exponent_BrighteningBoostVitC_06_Testimonial_a48fabf2-6a23-489e-ad0d-fe825e7a3622.jpg?v=1761080987 //credobeauty.com/cdn/shop/files/Exponent_BrighteningBoostVitC_07_HowTo_66067c73-21ff-4f02-af94-cefbdda50da2.jpg?v=1761080991 //credobeauty.com/cdn/shop/files/Exponent_BrighteningBoostVitC_09_InUse_99d428ed-3feb-4489-9b54-126dc50eb983.jpg?v=1761080994 //credobeauty.com/cdn/shop/files/Exponent_BrighteningBoostVitC_10_Ingredient_7c630ad0-906d-4e2a-b718-a6632edb9b06.jpg?v=1761080973 42182067519601 3 GRAMS 68.00 //credobeauty.com/cdn/shop/files/Exponent_BrighteningBoostVitC_01_Refill_e51bae5c-5ef8-45ef-88da-609ec1a1ce53.png?v=1761080968 https://credobeauty.com/products/brightening-boost-vitamin-c-powder-refill?variant=42182067519601 InStock 3 GRAMS