Allergen & irritant analysis
2 flaggedThis serum from La Roche-Posay lists 15 ingredients. AllerNote's analysis flags 1 known contact allergen and 1 common irritant in the INCI list. That includes 1 EU-labelled fragrance allergen (parfum). No parabens, MI / MCI (isothiazolinones), formaldehyde-releasing preservatives, SLS / SLES sulfates were detected in the listed ingredients.
- ParfumKnown allergen (fragrance): Fragrance Mix I
- Potassium hydroxideHighly alkaline and corrosive in concentrated form; can cause burns and irritation if not properly diluted and neutralized. It is used in very small quantities to adjust pH.
Not detected: parabens, MI / MCI (isothiazolinones), formaldehyde-releasing preservatives, SLS / SLES sulfates. Contains: added fragrance.
Based on what's flagged, take extra care if you're among:
- People with fragrance allergy or fragrance-sensitive skin
Generated from this product's ingredient list and AllerNote's allergen database — educational, not medical advice or a substitute for patch testing.
Benefits
Key Ingredients
- 1AntioxidantsShields skin from free radical damage.
- 2BHAUnclogs pores and reduces excess oil.
- 3Vitamin CBrightens, evens tone, and supports collagen.
- 4Hyaluronic AcidHydrates by attracting and holding water.
Full Ingredient List
15INCI (full list, INCI order): water, ascorbic acid, pentylene glycol, glycerin, potassium hydroxide, hydroxyacetophenone, sodium hyaluronate, adenosine, trisodium ethylenediamine disuccinate, salicylic acid, polyquaternium-67, caprylyl glycol, parfum, citric acid, laureth-23
Tap any ingredient to see details
Potential Concerns
- May Worsen RosaceaCan trigger flare-ups in rosacea-prone skin.
- May Worsen EczemaMay worsen itching or irritation for eczema.
- May Trigger AcneCan clog pores or trigger breakouts.
- May Worsen DrynessCan strip moisture and worsen dryness.
Frequently asked questions
Does Vitamin C12 Oil Control Serum contain fragrance allergens?
Yes — analysing the INCI list, AllerNote found 1 of the EU-labelled fragrance allergens: parfum. If you're fragrance-sensitive or patch-test positive to a fragrance mix, treat Vitamin C12 Oil Control Serum with caution and patch test before full use.
Is Vitamin C12 Oil Control Serum paraben-free?
No parabens were detected in Vitamin C12 Oil Control Serum's listed ingredients. Worth keeping in perspective: parabens are among the least common cosmetic allergens, so "paraben-free" matters far less for reactive skin than avoiding fragrance or the preservative MI/MCI.
Is Vitamin C12 Oil Control Serum suitable for sensitive or allergy-prone skin?
It depends on your specific triggers. Vitamin C12 Oil Control Serum contains 1 flagged allergen and 1 irritant (listed in the analysis above). If none are on your personal allergen list it may suit you, but patch test first — add your allergens to AllerNote to check Vitamin C12 Oil Control Serum against your own profile.

