Streptococcus Thermophilus Ferment is derived from fermenting the probiotic bacterium commonly used in yogurt production. The ferment produces enzymes that gently exfoliate dead skin cells and releases peptides and amino acids that support the skin barrier. Historically associated with the development of DNA repair enzymes in skincare (one of the first bacterial sources for T4 endonuclease V). Supports a healthy skin microbiome and improves skin smoothness.
Key Skin Benefits
+ Enzymatic gentle exfoliation for smoother texture
+ Peptides and amino acids — barrier support
+ Supports healthy skin microbiome balance
+ Source of DNA repair enzymes in cosmetic research
+ Improves skin surface smoothness
Pros
+ + Probiotic with enzymatic action
+ + Source of DNA repair enzymes (historic significance)
+ + Gentle — suitable for sensitive skin
+ + Microbiome-friendly
Cons
− − Fermentation quality varies
− − Must be properly preserved
− − Less studied than Lactobacillus ferments
Specifications
Property
Value
Usage Areas
Face, Eye, Body
Product Type
Leave-On, Rinse-Off
Source
Streptococcus thermophilus fermentation
Natural Level
Natural
Safety Ratings
Metric
Rating
Skin Sensitivity
1/5
Comedogenic Rating
0/5
EWG Score
1/10
Regional Regulatory Limits
Region
Leave-on %
Rinse-off %
Status
EU (CosIng)
No limit
No limit
Allowed
US (CIR/FDA)
No limit
No limit
Allowed
Japan (MHLW)
No limit
No limit
Allowed
ASEAN
No limit
No limit
Allowed
China (NMPA)
No limit
No limit
Allowed
Typical Usage % by Product Type
Product Type
Typical %
Serum
2 - 10%
Moisturizer
1 - 5%
Enzyme Mask
5 - 20%
References
Yarosh DB et al. — DNA repair enzymes in skincare. Lancet (2001). PMID: 11237073
Dimri GP et al. — Microbial enzymes in cosmetics. Biotechnol Adv (2015)
Kober MM, Bowe WP — Microbiome and skin. Int J Dermatol (2015). PMID: 25970010