★★★★★ (147)
Brightening Boost Vitamin C Power Serum
10% pure L-Ascorbic Acid + Quadruple Hyaluronic Acid. Brightens tone, fades sun damage.
$128.00
Clinical skincare that's made fresh in every dose
Most clinical serums lose potency the moment they're bottled in water. Exponent keeps active ingredients dry and activates them fresh at your sink — so your skin gets the full clinical dose, not the leftovers.
★★★★★4.6/5|147 verified reviews Shop the clinical routineSee how it works
CLINICALLY PROVENVisible results in 1–2 weeksFull-potency actives, activated fresh
REAL PEOPLE · REAL SKIN
Why people switched their routine to Exponent
Tap any clip to hear it from them — real customers on their fresh daily dose.
BESTSELLERS
Clinical actives, activated fresh
Full-potency formulas, fresh at every use. Start with one, or build the routine.
★★★★★
Time Rewind Retinol Power Serum
Fresh-activated retinol to smooth fine lines and renew texture — potent, with less irritation.
$128.00
★★★★★
Firming Filter CoQ10 Power Serum
CoQ10 to firm, plump and restore collagen for visibly lifted, more resilient skin.
$128.00
★★★★★
Calm Revival Green Tea Resveratrol Power Serum
Green tea + resveratrol antioxidants to calm redness and defend against daily environmental stress.
$128.00
REAL PEOPLE · REAL SKIN
Rated the best clinical skincare they've used
4.6/5 from 147 verified reviews.
★★★★★
Ditched my old serum
Huge improvement in my skin tone using this daily — and that's after ditching SkinCeuticals C serum. Completely worth the cost, even as a skincare minimalist.
★★★★★
My husband noticed too
I noticed a change within days… but the real miracle is that my husband noticed TOO! This is my forever Vit C.
★★★★★
Sunspots lightened in a week
Within a week my sunspots lightened… my skin is clearer and brighter. I won't use anything else — and trust me, I've tried everything.
WHY FRESH MATTERS
Most clinical serums start decaying the day they're bottled. Yours won't.
Pre-mixed actives oxidize on the shelf — losing potency before they ever touch your skin. That's why so many "clinical" serums turn orange and stop working.
Exponent keeps anti-aging ingredients in their most potent dry state, sealed until the second you activate them with our hyaluronic acid serum. Every dose is a day-one dose.
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CLINICAL, MINUS THE DOWNSIDES
Everything a results-driven routine should be — and none of what it usually costs you
Real potency and visible change, without the irritation, oxidation, and overflowing cabinet.
- Full-strength Vitamin C, every time. Activated fresh so it can't oxidize into a weak, orange serum before you use it.
- Retinol that's potent but non-irritating. A precise, fresh dose without the nasty stabilizers to reduce the peeling and stinging most people quit over.
- Less product waste. Refillable dispensers mean fewer bottles thrown away and more of what you buy actually used.
- Simple enough to stick with. Stamp, pump, mix in 4 seconds. A clinical routine you can actually keep up every day.
MEASURED WITH INSTRUMENTATION
Clinical results you can see — and count
Percentage trumps perception. Every Exponent serum goes through full, measured clinical testing.
100%
Fine lines + wrinkles
of subjects had a decrease in fine lines and wrinkles in 1 week
72%
Firmness
of subjects had an increase in skin firmness in 4 weeks
66%
Discoloration + pigmentation
of subjects had increased brightness and reduced discoloration in 4 weeks
Independent clinical facility, multi-week study, 28 female subjects. Evaluated with VISIA Image Analysis Pro, lesion counting with a board-certified dermatologist and trained technician.
WHAT MAKES IT THE BEST
Clinical results — without the compromises other brands ask for
If you've been searching for clinical skincare that actually works, here's what sets Exponent apart.
01
Powder-fresh potency
Actives stay in dry form until you activate them — so they never oxidize in the bottle like pre-mixed serums do.
02
Full clinical dose
You apply the strength on the label — not a diluted version that's been sitting on a shelf for months.
03
Made for sensitive skin
Skipping artificial shelf life means skipping the harsh stabilizers that make traditional clinical serums sting and redden.
04
Built-in hydration
Activated with a Quadruple Hyaluronic Acid Serum — four weights of HA that deeply hydrate as the actives work.
05
Precisely dosed
Stamp, pump, mix. Every application delivers an exact dose for visible results — no guessing, no waste.
06
Clean + clinically tested
Free of fragrance, parabens, phthalates, dyes and alcohol. Cruelty-free, B Corp certified, refillable by design.
FEATURED IN
FOR SKIN THAT REACTS TO EVERYTHING
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Finally, high-potency clinical actives that sensitive skin loves
If dermatologist-strength actives have left your skin red, tight or breaking out before, the culprit was likely the stabilizers — not the actives. Fresh activation makes irritation unnecessary.
My face had irritated redness with breakouts. This serum eliminated the redness, the breakouts stopped, and the remaining marks are fading. None of the typical dryness.
— Anita S., Verified BuyerI'm recovering from topical steroid withdrawal and must avoid numerous ingredients. This duo dramatically transformed my skin — it heals quicker and the glow is unreal.
— Tengku I., Verified BuyerTry it on your skin. Returns are free.
We're confident you'll see the difference in 1–2 weeks — most people do. If it's not the best clinical skincare you've ever used, send it back. Returns are always free, and shipping is free on orders over $75.
Try it risk-freeFree shipping over $75 · Free returns · Free travel pochette with $125+
GOOD QUESTIONS
Frequently asked questions
What makes this "clinical" skincare?
Potency you can count on. Traditional serums pre-mix actives in liquid, where they oxidize and weaken on the shelf. Exponent keeps clinical-strength actives in dry form and activates them fresh with hyaluronic acid at every use — so every dose delivers full strength, verified by measured clinical testing.
Is it suitable for sensitive skin?
Yes — it was formulated for it. Because the actives are activated fresh, we don't need the harsh stabilizers that commonly cause stinging and redness in pre-mixed serums. Formulas are also free of fragrance, alcohol, parabens, phthalates and dyes.
How quickly will I see results?
In independent clinical testing of Brightening Boost, 100% of subjects saw a decrease in fine lines and wrinkles within 1 week, and brightening of sunspots and discoloration was measured within 1–2 weeks. Firmness improvements were measured at 4 weeks.
How do I use it?
Three steps: stamp the active powder into your palm for a precise dose, pump the hyaluronic acid hydrator on top, then mix with a fingertip and apply. Use in the morning on clean, damp skin, under moisturizer or SPF.
Was it tested by dermatologists?
Yes. An independent clinical facility ran a multi-week study in which subjects were evaluated with VISIA Image Analysis Pro and lesion counting by a board-certified dermatologist and trained technician.
What if it doesn't work for me?
Returns are free. If you don't love your results, send it back — no hoops, no hassle.
YOUR BRIGHTEST SKIN STARTS TOMORROW MORNING
Stop settling for clinical serums that expired in the bottle
Full-potency actives, activated fresh in every dose. Clinically proven brightening in 1–2 weeks — gentle enough for the most sensitive, reactive skin. Free returns, always.
Shop the clinical routineFree shipping over $75 · Free returns · Free travel pochette with $125+