You will not be allowed to compare more than 4 products at a time
View compareC20 Brightening L-Ascorbic Acid Serum
C20 Brightening L-Ascorbic Acid Serum
Our Price
$24.99 USD
Actual Price
Our Price
$24.99 USD
Unit price
per
Shipping calculated at checkout.
★★★★★
4.9
8 reviews
20% L-ascorbic acid plus niacinamide (B3), aimed squarely at dark spots.
- Targets dark spots, sun marks and uneven tone
- Niacinamide (B3) works alongside vitamin C on discoloration
- Antioxidant defense against daily UV and pollution stress
- Fragrance-free and oil-free
20% L-Ascorbic Acid + Niacinamide1 fl oz (30 ml)pH 2.5-3Uneven tone, dark spots
Secure Checkout
Free U.S. Shipping Over $50
30-Day Money-Back
Encrypted Payments
30-Day Money-Back Guarantee
30-Day Money-Back Guarantee
If a NuFountain serum isn't right for you, contact us within 30 days of delivery and we'll refund you in full. You don't need to return the bottle.
Reviews
Reviews
Best value
Buy 2, get 1 free
Add the 3-pack for $49.99, just $16.66 a bottle.
You save $24.98.
Our 20% L-ascorbic acid paired with niacinamide (vitamin B3) — a duo aimed squarely at dark spots, discoloration and uneven tone. Blended fresh to order and shipped in a light-blocking bottle.
- Two brightening actives: 20% vitamin C + niacinamide
- Targets dark spots, melasma, acne marks and sun damage
- Helps calm redness while evening out overall tone
- Fast-absorbing, oil-free and fine for daily use
Made fresh, shipped light-protectedBlended the day it ships, hand-dated, and bottled in light-blocking glass so your brightening actives stay effective.
Blended fresh to order
Hand-dated bottle
Made in the USA
0★ from 8 reviews
The NuFountain difference
Fading dark spots takes fresh, active vitamin C
Brightening is a patience game — and it only works if the vitamin C is actually active. Because L-ascorbic acid oxidizes on the shelf, a months-old serum brings less to the job. We blend yours to order so both brightening actives are at full strength when you start.
Typical shelf serum
- Mixed weeks or months before you buy it
- No way to know how old the vitamin C really is
- Potency quietly drops as it oxidizes
- Often padded with fillers and fragrance
NuFountain C20 Brightening
- Blended the day your order ships
- Hand-dated so you see exactly how fresh it is
- Two brightening actives at full strength
- Short, transparent ingredient list — nothing you don't need
What it does
Built to even things out
Vitamin C and niacinamide tackle uneven tone from two angles at once.
Targets dark spots
Helps interrupt excess pigment so sun spots, acne marks and discoloration gradually fade toward an even tone.
Boosts radiance
Vitamin C brightens overall dullness for skin that looks clearer, fresher and more lit-from-within.
Calms & strengthens
Niacinamide helps soothe redness and support the skin barrier while the vitamin C does its brightening work.
What's inside
A focused brightening duo
Two proven tone-evening actives, no fragrance and nothing extra to irritate.
20%
L-Ascorbic Acid
Active vitamin C — brightens, supports collagen and helps fade discoloration over time.
+
Niacinamide (Vitamin B3)
A gentle brightener that helps limit pigment transfer, calm redness and strengthen the skin barrier.
+
Glycerin
A humectant that keeps the formula hydrating and comfortable for daily use.
Full ingredient list
Purified Water, 20% L-Ascorbic Acid, Niacinamide (Vitamin B3), Citric Acid, Magnesium Sulfate, Glycerin.
What to expect
Real results run on consistency
Tone correction is gradual by nature. Here's an honest timeline — results vary, and daily sunscreen is essential to keep spots from returning.
Weeks 1–2
Brighter, calmer
Skin often looks more radiant and a little less red as it adjusts.
Weeks 4–6
Marks soften
Newer dark spots and post-acne marks begin to look lighter with daily use.
Weeks 6–8+
More even tone
Stubborn discoloration and sun spots typically show their clearest improvement here.
How to use
Four steps, up to twice daily
1
Cleanse
Start with clean, dry skin.
2
Apply 5–6 drops
Pat gently over the face, focusing on areas of discoloration. A mild tingle is normal.
3
Let it absorb
Give it a minute to dry before your next step.
4
Moisturize + SPF
Follow with moisturizer, and always sunscreen in the morning.
New to vitamin C? Start every other day and build up. Patch test first if your skin is sensitive. Keep the cap tight and store in a cool, dark place — refrigerate unopened bottles. If the serum turns deep amber, it has oxidized and it's time for a fresh one.
Protect your results
Vitamin C works best with daily sunscreen
We don't sell sunscreen — so this isn't an upsell. It's the single most important thing you can do to protect what your serum is working toward, and it's worth getting right.
Without daily SPF
- UV light breaks vitamin C down and undoes your brightening
- New dark spots and sun damage keep forming
- Collagen breakdown speeds up, so fine lines deepen
- Your serum is left fighting an uphill battle
Vitamin C + daily SPF
- Locks in and protects your brightening progress
- Helps stop new dark spots before they start
- Guards the collagen your serum is helping build
- The two work together for visibly better results
What to look for in a sunscreen
Broad-spectrum
Look for the words “broad-spectrum” — it protects against both UVA (aging) and UVB (burning) rays.
SPF 30 or higher
SPF 30 blocks about 97% of UVB. Go higher if you're outdoors a lot — just don't drop below 30.
Every single morning
Apply as the last step of your morning routine, over your serum. Reapply every two hours in direct sun.
A texture you'll wear
Mineral (zinc oxide, titanium dioxide) or a modern chemical filter — pick one that feels good so you use it daily.
Reviews
For the spot-fading crowd
0
☆☆☆☆☆
8 verified reviewsGood to know
Questions, answered
How is this different from the other C20 serums?
All three use 20% L-ascorbic acid. This one adds niacinamide specifically to target dark spots, discoloration and uneven tone, and to help calm redness — so it's the pick if pigmentation is your main concern.
Can I use vitamin C and niacinamide together?
Yes. Despite an old myth, modern formulas pair them safely, and together they're a strong duo for brightening and evening skin tone. This serum combines both for you in one step.
How long until dark spots fade?
Pigment correction is gradual. Many people see brighter, calmer skin within a couple of weeks, with more even tone over 6–8 weeks of daily use. Wearing sunscreen every morning is what keeps spots from coming back.
How should I store it, and how long does it last?
Keep the cap closed and store in a cool, dark spot; refrigerate unopened bottles to extend freshness. Once opened, use it within about three months. A deep amber color is your signal it has oxidized and it's time for a fresh bottle.
What if it doesn't work for me?
You're covered by our 30-day money-back guarantee — no need to return the bottle. If you're not happy, contact us for a full refund.
Zero risk
Try it for real. If it's not for you, we'll refund you.
We stand behind every fresh-blended bottle with a 30-day money-back guarantee — no returns required. That's how confident we are in what "fresh" does for your skin.
Choose your serum ↑