# Taking Vitamin D When You Don’t Need It May Lead to Faster Cognitive Decline, Study Shows

> **Newsylist Open Intelligence Dossier** · First detected: 2026-09-24 22:29 UTC · Category: Health · Sources: 3 · Current Velocity: 6.5

## Multi-Source Evidence Table
| Source Outlet | Headline | Published (UTC) | Verification URL |
|---|---|---|---|
| MedShadow Foundation | Glucosamine May Not Help Your Joints. And It Might Harm Your Brain | 2026-09-24 19:41 | [Source Link](https://news.google.com/rss/articles/CBMimwFBVV95cUxPVkttZ3o2X3h6NVZxQjJpZVJod2pXWXNOMUw2NmpHNE9saU96WjZWM3lHN1I0UFdEd2w4N2RwcnNPVFNUbjMzQnNTcUhEWEF4c3JaZ3otSjMwcVpYSVRqSHFKVDRCRGxkSE4xVVREajZUcW1mbnIyUG1LaDhKN0l1WFdMQUh0di0ybEMzeXByTVBNbm1SNU1nRXRmTQ?oc=5) |
| Medical Xpress | Trusted supplements in the hot seat: Could they harm the aging brain? | 2026-09-24 19:41 | [Source Link](https://news.google.com/rss/articles/CBMiggFBVV95cUxQY0xwUGxtNlNSZ1k1NXZzNmpVblpoRkVnblh2WUgyM2luSTZFTm5DalQ0M1ZPaWlXYkJsM1dBMExEcFZUSWhBbzJ2NWlUeFVRX3Y3dlZTYUlrd005Z1g1Z2NqZUJnbzY1SGdJWUtfLXFSUXJqZXJfUzNQVkcxZWJKLXl3?oc=5) |
| Verywell Health | Taking Vitamin D When You Don’t Need It May Lead to Faster Cognitive Decline, Study Shows | 2026-09-24 19:41 | [Source Link](https://news.google.com/rss/articles/CBMikwFBVV95cUxNREV5MHRwQVJyNkJ1d0V5SW5uVUc5SFZ6QllfWmFOWHZyS1hub0VYT0VtYlFSSlc5ZnZkODBCXy1mcGt6UnZQQ0d2RDdyN0pqTzFZWmh4V0RwT25lbnZtb0F2U2FXWmZRTHpzVDRDbnVscVpzX3AySE5WUUZVVzU3aVBrVjdYdXRxZHdYUkd1WHZLdlk?oc=5) |

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*Canonical Source: https://www.newsylist.com/trend/2026-09-24/taking-vitamin-d-when-you-don-t-need-it-may-lead-to-faster-cognitive-decline*
*Synthesized by Newsylist Open Intelligence Engine under E-E-A-T journalistic standards.*