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Brighten Serum

2% Ascorbyl Glucoside + Ferulic Antioxidant Serum

30 ml / 1.01 fl oz Ecocert COSMOS Natural certified.

Fades post-blemish marks and brightens uneven skin tone. Formulated with stable, non-stinging vitamin C that will not turn brown in the bottle.

Free with your plan

Free $6.95
US shipping, on every box
  • Dermatologist tested
  • Ships in 24 hours
  • European formulation standards
  • Stable 2% Ascorbyl Glucoside: Advanced vitamin C derivative that delivers potent brightening without oxidizing or stinging.
  • 1% Ferulic Acid + 1% Sea-Buckthorn: Amplifies antioxidant defense to improve firmness and protect against dark spot recurrence.
  • Dermatologically Tested: Verified non-irritating on human subjects under clinical supervision.

The problem it solves

Why this step exists, and what it changes.

Traditional vitamin C (L-ascorbic acid) is notoriously unstable. It oxidizes into a brown liquid in the bottle within weeks, stings on application, and can trigger breakouts on sensitive skin. Yet weak alternatives fail to move stubborn dark spots. Brighten Serum uses a stabilized clinical derivative that stays active to the last drop.

How it works on the skin

Combines 2% ascorbyl glucoside with 1% ferulic acid and 1% organic sea-buckthorn oil. Ascorbyl glucoside converts into active vitamin C inside the skin, where it inhibits the tyrosinase enzyme to fade dark spots and even out tone without burning on contact. Ferulic acid stabilizes the formula and defends against free radical damage, while dual-weight hyaluronic acid keeps skin hydrated and radiant.

What is in it

  • 2% Ascorbyl Glucoside (vitamin C)High-stability vitamin C derivative that fades sunspots and post-breakout discoloration without stinging or oxidizing.
  • 1% Ferulic AcidPlant antioxidant that supports skin firmness and multiplies vitamin C efficiency.
  • 1% Sea-Buckthorn OilCertified organic berry oil rich in rare palmitoleic acid (Omega-7) that supports barrier resilience and radiance.
  • Hyaluronic AcidPlumps skin with moisture, ensuring a dewy finish that sits smoothly under SPF.
  • Ecocert COSMOS Natural certified
  • Vegan

This one is scented. The fragrance is named in the list below.

How to use it

  1. 01Dispense 3 to 4 drops onto clean fingertips.
  2. 02Press smoothly across face and neck every morning after cleansing.
  3. 03Follow with moisturizer and always finish with broad-spectrum SPF to protect your brightening results.
How often
Morning & Evening
Where in the routine
After cleansing, before moisturizer.

Who it is for. And who it is not.

Buy it if

  • Old breakout marks and sunspots linger for months after blemishes heal.
  • Your complexion looks dull, tired, or uneven in morning light.
  • You tried high-strength vitamin C serums and found them stinging or irritating.

Skip it if

  • You have a nut allergy. Sweet almond oil is present in this formula.
  • What you are calling dullness is really rough, built-up surface skin rather than uneven tone. Resurface Toner is for that.
  • You will not wear sunscreen in the morning. Fading marks while allowing UV to make new ones cancels the work.

Works with

The rest of the routine this one belongs to.

  • Reset Cleanser
    C1Reset Cleanser
    The wash that clears the way for it.
    $19.60 $28.00
  • Balance Gel
    B1Balance Gel
    The oil-free gel to finish on, if your skin runs oily.
    $29.40 $42.00
  • Barrier Cream
    S1Barrier Cream
    The fragrance-free cream to finish on, if it runs dry.
    $29.40 $42.00

Calibrate the rest of your ritual.

Skincare works best as a calibrated system rather than isolated bottles. Take our 2-minute quiz to build your complete custom routine. Your first box is $49 for three products, $59 for four. After it, 20% off every refill and free US shipping. Pause or cancel anytime.

Formulation standards

Independent testing and European cosmetic standard production.

ISO 22716 Certified

Formulated and produced in European GMP-certified facilities with strict batch traceability.

Dermatological Safety

Formulas evaluated under dermatological supervision for high skin tolerance.

Pure Formulations

Zero synthetic mineral oils, zero phthalates, zero microplastics, and zero animal testing.

Read before you buy

What the skin is doing, and the studies behind the ingredient. Written by us, cited to the paper.

Questions

Brighten Serum
$29.40 first bottle - on a plan (save $12.60)