Inês M.
Lisbon · Combination35–44 · Verified buyerUsed 10 weeks
★★★★★
One bottle, one job
I stopped buying serums with twelve ingredients. One bottle, one job, and my skin has never looked this even.
CV-15C · SerumLot 2610-14
Vitamin C 15%
L-ascorbic acid with ferulic acid and vitamin E
4.61,284 reviewsBrightens dull skin and fades dark marks. Mornings, before SPF.
Size30 ml / 1 fl oz
€34.00€1,133.33 / l · VAT included
- Dispatch
- Ships from Porto in 1 working day
- Delivery
- 1–2 working days in Portugal · free over €40
- Extras
- Two samples with every order · 30-day returns, opened or not
- Dose
- 3 drops
- Texture
- Water-light
- pH
- 3.2
- Fragrance
- None added
- After opening
- Use within 3 months
- Size
- 30 ml / 1 fl oz
Three working ingredients. Nothing for scent, colour or feel.
- L-ascorbic acidBrightens and fades marks15%
- Vitamin E (tocopherol)Stabilises the vitamin C1%
- Ferulic acidExtends its antioxidant life0.5%
Results
What changed in four weeks.
Independent consumer study · 32 participants, ages 24–58 · Twice daily · 4 weeks · Self-assessed · 2026
- 91%said skin looked brighter
- 84%saw dark marks fade
- 96%would buy it again
Individual results vary. Not a clinical trial.
Vitamin C 15% · lot 2610-14
After opening
Watch the colour, not the calendar.
Pale gold when filled. Deeper amber as it ages.
Day 1
Filled
Pricing, openly
What €34 pays for.
- €5.20Formula
- €3.10Glass, dropper and carton
- €2.40Filling in Porto
- €4.10Delivery
- €6.20Team
- €6.64Margin
- €6.36VAT (23%)
- €34.00You pay
After the last drop
- Bottle
- Clear glass, 30% recycled. Glass bank.
- Collar
- Stainless steel. Metal recycling.
- Bulb
- Natural rubber. General waste.
- Carton
- FSC board, no lamination. Paper recycling.
Reviews
4.6
1,284 reviews · 91% rate it 4 or 5
- 5
- 951
- 4
- 218
- 3
- 64
- 2
- 29
- 1
- 22
Showing the most helpful reviews
Claire D.
Lyon · Sensitive35–44 · Verified buyerUsed 6 weeks
★★★★★
Works, but it stings
My skin does look brighter, but the first five or six mornings it stung enough that I nearly gave up. Better now, still not pleasant.
Reply from Cuvette · Marta, formulation
Thank you, Claire. At pH 3.2 a short tingle is expected, and on sensitive skin it can be more. Try alternate mornings for two weeks, and put Hyaluronic on first so the vitamin C goes onto a cushion. If it still stings after that, write to us and we'll refund it.
Lucía R.
Valencia · Normal25–34 · Verified buyerUsed 8 weeks
★★★★★
The marks from last winter are gone
Two old spots on my cheek from a bad breakout have faded to almost nothing. It tingles for a few seconds and then you forget it is there.
Next in your morning
Hyaluronic 2%
Holds water in the skin all day. Morning and night, on damp skin.
Morning step 3, after Vitamin C. Night step 2, before Niacinamide or moisturiser.