Weissella cibaria, a fermented-food bacterium sold as a slowly dissolving probiotic tablet for oral health, may modestly calm gum inflammation and bad breath in adults with inflamed gums. Evidence is small and largely tied to the company selling it; plaque, cavity and quality-of-life benefits were not shown. Side effects matched placebo, but related bacteria occasionally cause serious infections in people with weakened immunity or medical devices. (Full Review)
| Marker | Target | Why |
|---|---|---|
| Bleeding on probing (% of sites) | <10% of sites | Gum inflammation |
| Gingival index (0–3 or modified 0–4 scale) | No established target; track change from own baseline | Gum redness and bleeding |
| Volatile sulfur compounds (breath gas) | No established target; track change from own baseline | Bad breath |
| Absolute neutrophil count | 1.5–8.0 × 10⁹/L | Safety check: a low count stops use |
Cadence: Dental and breath measures at baseline, 4 and 8 weeks, then every 6–12 months at routine dental visits if use continues; breath measured in the morning before eating or brushing; complete blood count only during chemotherapy or immunosuppression. No change by week 8 suggests no added benefit.