GLP1 analogs can cross the blood–brain barrier and stimulate the GLP1 receptor in the brain.[1]

There is also research showing improvement in Alzheimer's disease symptoms. [2]

[1] https://pubmed.ncbi.nlm.nih.gov/11931352/

[2] https://www.sciencedirect.com/science/article/pii/S221287782...

they could help prevent the occurrence