Skip to content

Skin Conditioning

SH-POLYPEPTIDE-39

70

Safety score · 0–100

Fine

Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.

A lab-made copy of interleukin-9, a human immune-signalling protein. Used in trace amounts for skin conditioning. Tolerated at cosmetic levels but the biology is potent and human data is thin.

Function

SKIN CONDITIONING

Skin benefits

  • Skin conditioning at low cosmetic concentrations
  • Bioengineered IL-9 analogue
  • Targeted use in specialist formulations

Known concerns

  • IL-9 is an immune cytokine
  • Limited independent dermal safety data
  • Manufacturing purity supplier-dependent

References

EU

EU CosIng database

European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.

Related skin conditionings

70
(ANGELICA ACUTILOBA/PAEONIA LACTIFLORA) ROOT/CNIDIUM OFFICINALE RHIZOME EXTRACT
Skin Conditioning
 70
(ARNICA MONTANA/CALENDULA OFFICINALIS/MATRICARIA CHAMOMILLA) FLOWER EXTRACT
Skin Conditioning
 70
(ARTEMISIA SIEVERSIANA/DIMOCARPUS LONGANA) FLOWER/LEAF/STEM EXTRACT
Skin Conditioning
 70
(ASPARAGUS COCHINCHINENSIS/LIRIOPE MUSCARI/REHMANNIA CHINENSIS) ROOT EXTRACT
Skin Conditioning
 70
(CNIDIUM OFFICINALE/COPTIS CHINENSIS/GLYCYRRHIZA URALENSIS) ROOT EXTRACT
Skin Conditioning
 70
(VETIVERIA ZIZANOIDES ROOT/PUERARIA THUNBERGIANA FLOWER/LEAF/STEM) WATER
Skin Conditioning
 70
1,3-Dihydroxy-2-propanone
Skin Conditioning
 70
ABIES ALBA WOOD EXTRACT
Skin Conditioning

Check your shelf

Find SH-POLYPEPTIDE-39 in your products.

Scan any cosmetic product with LuxSense to see if it contains SH-POLYPEPTIDE-39 and get a full ingredient breakdown with safety scores.

This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve, so always read the physical product label and consult a healthcare professional for personal concerns.