The dirty secret about Vitamin C serums? They oxidize and lose potency long before you finish the bottle.
Brightening Boost keeps 10% pure Vitamin C (L-Ascorbic Acid) in powder form until activated with a hyper-moisturizing Hyaluronic Acid in your palm for a potent, effective serum.
Clinically proven to reduce sunspots, discoloration, and fine lines in 1-2 weeks. Suitable for sensitive skin.
$128.00 Brightening Boost Vitamin C + Hyaluronic Serum
Mix your morning dose in three steps
Do not rely on Vitamin C that has been sitting pre-mixed. Use Brightening Boost as the first layer on clean, damp skin in the morning, then layer moisturizer or SPF.
01
Stamp the Vitamin C powder and pump the hydrator
Stamp one dose of Vitamin C Active Powder and pump the hyaluronic acid hydrator into your palm.
02
Mix into a fresh serum
Blend the powder and hydrator together right before applying.
03
Apply before moisturizer or SPF
Smooth over clean, damp skin in the morning, then layer moisturizer or sunscreen.
Two-in-One Serum
One bottle of fresh, anti-aging L-Ascorbic Acid powder and one bottle of hyper-moisturizing Hyaluronic Acid serum. Designed for each other.
Sold as a Pair for $128.00
Includes the Precision Dispenser with Vitamin C Powder, plus the Pump with Quadruple Hyaluronic Acid Serum.
- 45 Vitamin C + Hyaluronic Acid doses
- 10% pure L-Ascorbic Acid powder 3g
- Quadruple Hyaluronic Acid Serum 15mL
In their words...
"Noticeable results, especially in evening discoloration and brightening tone."
"Best Vitamin C brightener I have ever used. After decades of sun exposure, daily use has markedly improved skin tone. Gentle yet effective."
"Within a week my sunspots lightened, my skin is clearer and brighter. I will not use anything else, and trust me, I have tried everything."
"It is the only one I have ever seen real impact from, even compared to SkinCeuticals. Now our whole chat group subscribed."
"I have wanted to try a Vitamin C for the longest time. I am so glad I chose this brand. I have seen great results too."
"This product does lighten dark spots and revives my skin."
"The texture is incredible. The ritual is quick and is my favorite part of my routine."
"I have been using Exponent's Vitamin C product for several months and have had fantastic results."
"Love this so much. Use it daily. My skin feels hydrated and brighter. Will definitely reorder."
"I have brighter skin after using Vitamin C from Exponent. Much more effective than other products I have used."
Answers before you make it your morning Vitamin C
Positive, source-backed answers on freshness, results, routine, sensitive skin, and what is included.
How do I use it in my routine?
Use it in the morning as your first layer on clean, damp skin. Layer underneath moisturizer or SPF.
How does fresh mixing solve the bottled Vitamin C problem?
Exponent notes that pure L-Ascorbic Acid is effective but fragile and prone to degradation unless it is kept in powder form and activated fresh. Brightening Boost keeps the active as powder until you mix it in your palm.
Is it made for sensitive skin?
Brightening Boost is formulated for sensitive skin and pairs 10% pure L-Ascorbic Acid with a hyaluronic acid hydrator. If you are unsure how your skin will respond, patch test first or ask your skincare professional.
What results were measured in clinical testing?
In clinical testing, VISIA imaging showed a noticeable decrease in subdermal sun spots after two weeks. After four weeks, 66% of subjects showed increased brightness and decreased discoloration.
Can I use it with retinol?
Vitamin C is positioned as the morning active. Retinol is usually used in the evening. If you use both, keep Vitamin C for AM and retinol for PM unless your skincare professional advises otherwise.
What comes in the Power Serum?
The Power Serum includes the Precision Dispenser with Vitamin C Powder, 3g, and the Pump with Quadruple Hyaluronic Acid Hydrator, 15mL. The Power system gives you 30 fresh-mix doses.
Potent with no Irritation
Activate 10% pure L-Ascorbic Acid powder with Hyaluronic Acid for a fresh serum that tackles sunspots, discoloration and fine lines in 1--2 weeks.
Brightening Boost Vitamin C Serum $128.00