Serum

Updated 10 Dec 2025

Rejuvenating 15 Serum

Name: Rejuvenating 15 Serum
Brand: Skinstitut
Availability: InStock

Skinstitut

42Ingredients

0EU Banned

9Caution

0.3/5Comedogenic

Pregnancy SafeNo flagged ingredients

0.3/5Comedogenic

Pregnancy SafeNo flagged ingredients

Low Allergens2 fragrance allergens

69% Natural24% 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.

EthoxydiglycolMax 10.0%

Max concentration:10.0%

Product types:(a) Oxidative hair day products(b) Non-oxidative hair dye products(c) Rinse-off products other than hair dye products(d) Other non-spray cosmetic products(e) The following spray products: fine fragrances, hair sprays, antiperspirant and deodorant

Conditions:(a) to (e):The level of ethylene glycol impurity in Ethoxydiglycol must be ≤ 0,1 %. Not to be used in eye products and oral products

PhenoxyethanolMax 1.0%

Max concentration:1.0%

Sodium BenzoateMax a) 2.5% (acid) | b) 1.7% (acid) | c) 0.5% (acid)

Max concentration:a) 2.5% (acid) | b) 1.7% (acid) | c) 0.5% (acid)

Product types:a) Rinse-off products, except oral care products | b) Oral care products | c) Leave-on products

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.

Product Type Restrictions

The following ingredients are restricted under EU Cosmetics Regulation (Annex III/V) for specific product types — but this product appears to be a Serum. Verify compliance.

EthoxydiglycolRestricted to hair dye products
(a) Oxidative hair day products(b) Non-oxidative hair dye products(c) Rinse-off products other than hair dye products…

Ingredient Chemistry

pH Efficacy

pH 5.5 — Suboptimal

0Neutral 714

pH estimated from category & ingredients: 5.5

Active ingredients: Copper Tripeptide-1, Glycolic Acid, Retinol

Copper Tripeptide-1 at pH 5.5: optimal range (5–7)

Glycolic Acid at pH 5.5: likely ineffective — above 4.5

Retinol at pH 5.5: optimal range (5–6)

Glycolic Acid is at pH 5.5, which is too high for optimal efficacy (3–4).

Detected actives & ideal pH

Copper Tripeptide-1pH 5–7

Glycolic AcidpH 3–4

RetinolpH 5–6

Microbiome

Composition & Ethics

Product Details

Attributes

Ethics

VeganLikely

No animal-derived ingredients detected

Cruelty-FreeUnknown

No brand statement — contact manufacturer

Safety

Fragrance-FreeContains fragrance

Contains fragrance/parfum

Key Actives

Contains RetinolConfirmed

Contains vitamin A derivative

Retinol / Vitamin AConfirmed

Exfoliating SerumConfirmed

Peptide SerumConfirmed

Confirmed Inferred Unknown Not compliant

Composition

69% natural24% synthetic

29 natural 3 unknown 10 synthetic

Based on 42 ingredients analyzed. 69% natural, 7% unknown and 24% synthetic.

Active ingredients5 actives

Preservatives3 preservatives

FragranceContains added fragrance

Functions Overview (15)

Texture & Feel

Expected texture

Viscous, serum-like — slightly "thick water" feel

SpreadabilityEasy

AbsorptionFast

Tackiness / ResidueVery low

Finish:Luminous / radiant — subtle light-reflecting glow

Slight initial tackiness that fades into a hydrated dewy finish.