
Dr. Althea
Vitamin C Boosting Serum30 ml
Mild. Vitamin C: ingredient no. 33, not counting water.from€22.60
€75.33 / 100 ml

CocopandaCheapest
Updated 2026-08-12
€16.20
€54.00 / 100 ml
Prices come from Finnish online stores and are shown in euros. Cocopanda delivers only within mainland Finland; Lyko's delivery terms also list Sweden, Norway, Denmark, Poland, the Netherlands, Austria, and Germany. Neither delivers to the US or the UK.
K-Secret SEOUL 1988 Glow Serum Niacinamide 15% + Yuja is a serum (30 ml). The product is Korean. The ingredient list has 40 ingredients, including niacinamide, squalane, and panthenol (B5). The product is silicone-free and sulfate-free. The product contains no drying alcohol. One retailer carries it right now, at €16.20.
Source: store product page · Updated 2026-08-12
Contains one flagged ingredient group. Key ingredient: Niacinamide.
The product contains essential oils or plant extracts that naturally carry them.
Niacinamide: ingredient no. 1, not counting water
A form of vitamin B3. Studied in relation to perceived oiliness and evenness of tone.
A humectant that binds water.
A humectant often used in formulations for sensitive skin.
Used in products aimed at uneven pigment.
An antioxidant. Derivatives differ in stability.
A light, well-tolerated oil component, usually obtained from olive or sugarcane. A different ingredient from squalene, which is on our watchlist.
Potent or Mild tells you how high the ingredient named on the product sits in its ingredient list. How the mark is set
Confidence: medium · v2026.09.3
This assessment is read from the ingredient list and is not medical advice. It makes no promise about acne. Individual skin reactions vary.
Read how we classify productsThe order is the manufacturer's own and follows concentration down to the one percent mark. Underlined names are flagged by our criteria. Names with a dotted underline open a short note on what the ingredient does in the formula.

Dr. Althea
from€22.60
€75.33 / 100 ml

COSRX
from€16.00
€80.00 / 100 ml

COSRX
from€17.55
€87.75 / 100 ml

Sungboon Editor
from€25.90
€74.00 / 100 ml