Soy Isoflavones
INCI: Glycine Soja Extract
Phytoestrogens from soy: genistein, daidzein, glycitein. Structurally resemble estradiol and weakly bind skin estrogen receptors. Marketing positioning – anti-age for menopausal skin where estrogen decline is linked to loss of firmness and density. Topical evidence base is limited, but safety profile is favourable.
Evidence by route
Topical application
CWeak evidence. In vitro data, open-label studies, or expert consensus.
Small clinical studies showed improved skin density and elasticity in postmenopausal women with daily use of 2-4%. Effects are modest and not comparable to prescription topical estrogens. No meta-analyses in dermatology journals.
- Sator PG et al. Br J Dermatol. 2007;156(Suppl 1):13-21.
- Izumi T et al. Int J Cosmet Sci. 2007;29(1):39-44.
Tolerability and safety
Irritation potential
LowAllergen risk
LowPregnancy
CautionSkin types
Suitable for
Use with caution
Frequently asked questions
Is Soy Isoflavones safe during pregnancy?
Soy Isoflavones should be used with caution during pregnancy. Consulting a dermatologist or OB-GYN is advisable.
What skin types is Soy Isoflavones for?
Soy Isoflavones suits: normal, dry, combination. Use with caution in: sensitive.