Ingredient Intelligence A–Z · Protein signalling molecules
Growth factors
Also called: Cytokines, EGF (epidermal growth factor), Conditioned-media ingredients
Editorial draft, pending expert review.Grades here are provisional editorial calls and may change after review. This is not medical advice.
What it is
Signalling proteins that regulate cell growth and repair. In cosmetics they may be recombinant, plant-derived or taken from cell-culture 'conditioned media'.
Why it is trending
Linked to the regenerative and 'skin longevity' conversation. Trend signals to be updated with current data.
How it could work (mechanism only)
In the laboratory, growth factors stimulate fibroblasts and keratinocytes. Whether large protein molecules reach living skin layers from a cream is uncertain.
What human studies show
Small, mostly short trials of specific topical growth-factor formulations report modest improvements in photoaging. Many are manufacturer-linked, and formulations are poorly standardised.
Who may benefit
Unclear; evidence does not identify a specific group.
Safety
Generally tolerated in small studies. Long-term safety of repeatedly stimulating growth pathways is not well established, and sourcing and purity vary.
Pregnancy and breastfeeding
Not established; ask your doctor.
What regulators say
Classification depends on origin and claims. Products making medical claims may be treated as drugs or biologics.
Where marketing overreaches
'Stem-cell' language and proof-of-regeneration claims that go beyond the published data.
Independent editorial information only. It does not replace diagnosis, treatment or advice from your own doctor.