Science
Mechanism of Action
The conditioned media contains a blend of cell-signaling polypeptides, known as growth factors, and exosomes. These growth factors initiate critical processes like cell growth, proliferation, and differentiation, while exosomes deliver vital components to support the extracellular matrix (ECM). Specifically, it facilitates angiogenesis through factors like VEGF and hepatocyte growth factor, modulates inflammatory responses via IL-6 and IL-8, and enhances ECM deposition through TGF-β1 and platelet-derived growth factor-A, ultimately contributing to collagen synthesis, scar repair, and improved hydration.
Research
Clinical Evidence
Medium confidence100-800 µg/mL%
Key findings
- 01 Keratinocyte-specific conditioned medium, at concentrations of 200-400 µg/mL, significantly enhanced attachment, proliferation, and migration of sub-confluent keratinocytes, promoting in vitro re-epithelialisation.
- 02 Fibroblast-specific conditioned medium, when applied at 400-800 µg/mL, substantially increased the healing rate in wound healing assays and improved keratinocyte attachment and proliferation.
- 03 Optimal keratinocyte attachment was observed at a concentration of 100 µg/mL for specific conditioned media (DFCM-KM1 and DFCM-KM2).
Transparency
Dusting Analysis
Due to its complex biological origin and the specialized nature of its active growth factors and exosomes, this ingredient is typically a high-value, active component and not commonly 'dusted' at negligible concentrations. Its inclusion usually indicates a targeted formulation for specific benefits.
The Formula
Formulation
Stability
Growth factors and extracellular matrix components are generally water-soluble. Optimal stability for related cell culture media is observed when stored in the dark at 2-8°C, avoiding freezing, with a typical shelf-life of up to 30 days. One specific high-molecular-weight factor from keratinocyte-conditioned medium demonstrated stability at acidic pH (pH 2) and elevated temperatures (56°C).
Safety
Safety Profile
This ingredient carries regulatory complexities: it is deemed illegal for cosmetic use in the European Union due to its human cell-derived nature, while generally permitted in the US. It is considered controversial due to its mitogenic (cell proliferation stimulating) activity. Individuals with psoriasis or those at a high risk of skin cancer are advised to avoid products containing growth factors. The CIR (Cosmetic Ingredient Review) has not yet reviewed this specific ingredient.
Your Skin
Skin Compatibility
Our Assessment
Verdict
While demonstrating significant in vitro efficacy for skin repair and anti-aging, its controversial mitogenic activity and legal restrictions in key markets like the EU warrant careful consideration for formulation and consumer use.
Related
Similar Ingredients
Finding similar ingredients…
References
Sources