A gut bacterium sold in fermented dairy and capsules. The clearest human results are digestive: particular laboratory lines have eased irritable bowel pain and bloating, and mixtures cut loose stools during antibiotic courses. Results attach to a named line, not the species on a label. Serious infections cluster in people with catheters, suppressed immunity, or damaged valves. (Full Review)
| Marker | Target | Why |
|---|---|---|
| LDL cholesterol | Below 100 mg/dL; 70 if heart risk is high | The one blood measure it reliably moves |
| Total cholesterol | 150–200 mg/dL | Confirms lipid direction; tracks HDL |
| hs-CRP | Below 1.0 mg/L | Tracks any inflammatory benefit |
| Fasting glucose | 75–90 mg/dL | Screens the metabolic endpoint |
| HbA1c | Below 5.4% | Confirms glucose handling over months |
| Faecal calprotectin | Below 50 µg/g | Separates symptoms from inflammation |
| Breath hydrogen/methane | Rise under 20 ppm within 90 minutes | Identifies bacterial overgrowth |
| IBS symptom severity | Below 75 (remission range) | The scale the strongest benefit used |
Cadence: Symptoms at 2, 4 and 8 weeks; lipids at 8–12 weeks, then every 6–12 months; blood counts if immunity changes.