Cognitive decline
Every intervention in the library graded against Cognitive decline — 1 link, strongest claim first. Each is the entry’s own reading of the evidence, not advice for anyone in particular.
No clear effect1 link
- Vitamin B12Evidence grade C
Corrects deficiency-linked decline only
Directions and grades are read from each intervention’s own entry in this library. They describe the evidence for a link, not what anyone should take, and they are no substitute for a clinician who knows the person.