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8

Ingredient · Probiotic

S. Thermophilus

Cleaner · 8/10, higher is cleaner

How we reached this

Streptococcus thermophilus — yogurt starter culture. FDA GRAS. Some immune + gut-microbiota benefits documented.

Sources · 1

Also listed as

s thermophilus

Products containing this · 6

About this rating

Ratings run 1–10, higher is cleaner, and are set editorially against the sources above — see the methodology page for how an ingredient rating becomes part of a product score. Last reviewed 2026-05-25.