Pro Strength Niacinamide Discoloration Treatment
Serum

Pro Strength Niacinamide Discoloration Treatment

Peter Thomas Roth
46Ingredients
0EU Banned
6Caution
0.4/5Comedogenic
Pregnancy SafeNo flagged ingredients
0.4/5Comedogenic
Pregnancy SafeNo flagged ingredients
Allergen-freeNo fragrance allergens
61% Natural37% synthetic

Contains Regulated Ingredients

EU Restricted Ingredients

These ingredients are permitted in the EU but subject to concentration limits, usage conditions, or mandatory labelling requirements under Annex III of the EU Cosmetics Regulation.

Alpha-ArbutinMax 5.0%
Max concentration:5.0%
Product types:(a) Face cream(b) Body lotion
Conditions:Hydroquinone levels shall remain as low as possible in formulations containing alpha-Arbutin and shall not be higher than the unavoidable trace level.From 1 February 2025 cosmetic products containing that substance and not complying with the conditions shall not be placed on the Union market. From 1 November 2025 cosmetic products containing that substance and not complying with the conditions shall not be made available on the Union market.
Kojic AcidMax 1.0%
Max concentration:1.0%
Product types:Face and hand products
Conditions:From 1 February 2025 cosmetic products containing that substance and not complying with the conditions shall not be placed on the Union market. From 1 November 2025 cosmetic products containing that substance and not complying with the conditions shall not be made available on the Union market.
PhenoxyethanolMax 1.0%
Max concentration:1.0%
What does "EU Restricted" mean?

Restricted ingredients are not banned — they are allowed in cosmetic products as long as specific conditions are met:

  • Concentration limits — maximum allowed percentage in the final product
  • Product type restrictions — some ingredients are only allowed in rinse-off or leave-on products
  • pH restrictions — the finished product must stay within a specific pH range
  • Mandatory labelling — certain allergens must be listed on the packaging
  • Usage conditions — must not be combined with certain other ingredients

These limits are based on the EU CosIng database (Annex III) and are updated regularly. Products sold in the EU must comply with all applicable restrictions.

Ingredient Chemistry

pH

pH Efficacy

pH Efficacy

pH 5.5 — Suboptimal
5.5
0Neutral 714
pH estimated from category & ingredients: 5.5
Active ingredients: Niacinamide, Tranexamic Acid, Alpha-Arbutin, Glycolic Acid, Kojic Acid
Niacinamide at pH 5.5: optimal range (5–7)
Tranexamic Acid at pH 5.5: optimal range (3.5–5.5)
Alpha-Arbutin at pH 5.5: optimal range (4–6.5)
Glycolic Acid at pH 5.5: likely ineffective — above 4.5
Kojic Acid at pH 5.5: acceptable but not ideal (3.5–5 is best)
Glycolic Acid is at pH 5.5, which is too high for optimal efficacy (3–4).
Detected actives & ideal pH
NiacinamidepH 5–7
Tranexamic AcidpH 3.5–5.5
Alpha-ArbutinpH 4–6.5
Glycolic AcidpH 3–4
Kojic AcidpH 3.5–5

Microbiome

Composition & Ethics

Product Details

Attributes

Ethics
VeganLikely
No animal-derived ingredients detected
Cruelty-FreeUnknown
No brand statement — contact manufacturer
Safety
Fragrance-FreeLikely
No fragrance ingredients detected
Key Actives
Niacinamide SerumConfirmed
Exfoliating SerumConfirmed
Brightening SerumConfirmed
Confirmed Inferred Unknown Not compliant

Composition

61% natural37% synthetic
28 natural 1 unknown 17 synthetic

Based on 46 ingredients analyzed. 61% natural, 2% unknown and 37% synthetic.

Active ingredients4 actives
Preservatives3 preservatives
Silicones2 silicones

Functions Overview (15)

Texture & Feel

Texture & Feel

Expected texture
Lightweight, watery liquid that spreads easily
SpreadabilityVery easy
AbsorptionFast
Tackiness / ResidueNone
Finish:Soft matte — natural-looking, shine-controlled

Silicones create a smooth, velvety "slip" with a blurring sensory effect.