Streptococcus thermophilus ST-21
Streptococcus thermophilus ST-21 is a strain within a species best known for its role in yogurt and dairy fermentation, where it contributes to lactic acid production and texture. The strain-specific research identified for ST-21 is limited and primarily involves multi-strain products, including a randomized trial in children with acute diarrhea and an animal study examining Clostridioides difficile challenge, making it difficult to attribute observed effects to this strain alone. Strain-specific human efficacy data for ST-21 as a single agent are currently limited. These are research topics, not findings; the papers do not establish that this strain treats or prevents any condition.
Where it's been studied Tags come from a conservative keyword scan of each paper's title, abstract, and summary. A tag is research coverage, not measured effect. How we classify this →
Share of this strain's 2 body-system-tagged papers that concern each system. Research coverage, not measured effect.
Symptoms in the research A tag means the paper's text names the symptom or condition — research coverage, not evidence of benefit. How we classify this →
Share of this strain's 1 symptom-tagged papers that mention each symptom or condition. Research coverage, not evidence of benefit.
Research Study-type filters use AI-classified labels, audited but not guaranteed — check the paper itself before leaning on one. How we classify this →
3 papers reference this strain in the probiotic database.
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Citations
Selected papers that name this strain.
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Source →A randomized, double-blind, placebo controlled trial to evaluate the efficacy and safety of probiotic preparation in children with acute Diarrhea· Edelweiss Applied Science and Technology · 2025