GLP-1 drugs linked to vision loss lawsuits, Alzheimer's research, and market impact.

Lawsuits over GLP-1 drugs causing vision loss, a new Alzheimer's brain map, scrutiny of ibogaine, and GLP-1 drugs affecting the snack food market. McDonald's also announced a menu change for GLP-1 users. Experts warn of a rare vision risk for GLP-1 users.