At Complete Health, our passion and expertise includes guidance on the potential benefits of dietary supplements.  Curcumin deserves a special mention due to its impact on so many areas of the body, including cognitive/brain, immune, cardiovascular, musculoskeletal/joint, liver, and gut.  

Here is study published in December, 2021, reflecting potential benefit for stopping the progression of Alzheimer's:

Cognitive/Alzheimer's/Pre-Dementia:
"Conclusion: Theracurmin seems to be a therapeutic option for elderly patients with AD and MCI via providing stabilization of the disease course by preventing progressive loss in cognitive functions and ADLs."
https://pubmed.ncbi.nlm.nih.gov/34939543/