Respiratory

Affects the respiratory tract — upper respiratory infections, asthma, nasal/sinus symptoms

Entry 2

Lacticaseibacillus casei* Shirota (LcS)

Stimulates NK cell activity via IL-12 signaling to reduce upper respiratory tract infection risk, supported by multiple RCTs.

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immunological

Respiratory

Entry 22

Bifidobacterium breve M-16V: B. breve M-16V

Uses immune modulation to reduce allergic sensitization and respiratory symptoms in children, with RCT evidence.

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Pediatric

immunological

Respiratory

Entry 23

Bifidobacterium longum BB536: B. longum BB536

Uses competitive pathogen exclusion and immune modulation to reduce infections and allergy symptoms, with RCT support.

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Gastrointestinal

immunological

Respiratory