What changed
Evidence moves. Every grade change is versioned and reversible to its trigger — this feed and our audit log are the same rows. Subscribe to be told when an intervention you care about moves (re-engagement that serves you, not us).
| Date | Intervention | Change | Why |
|---|---|---|---|
| 2026-05-10 | Berberine blood sugar | ↑ upgraded C → B | New meta-analysis strengthened the glycemic-control evidence. |
| 2026-05-02 | Creatine cognition | ↑ upgraded C → B | New RCTs on cognitive performance (notably under sleep deprivation) strengthened the grade. |
| 2026-04-12 | Vitamin C cold prevention | ↓ downgraded C → null-result | Meta-analysis confirmed no prevention benefit in the general population; regraded to null-result. |
| 2026-03-20 | Omega-3 heart health | ↻ restated B → B | A large cardiovascular outcomes trial missed its primary endpoint; state softened to mixed. |
| 2026-03-01 | Glucosamine joint health | ↓ downgraded B → C | Large independent trials showed inconsistent benefit; grade lowered. |
| 2026-02-10 | Ashwagandha stress | ↑ upgraded untested → C | Additional small RCTs moved stress from untested to a weak, gradeable effect. |
| 2026-01-15 | Ginkgo cognition | ↓ downgraded B → C | A large dementia-prevention trial reported a null result. |