The prevention of dementia is increasingly a task for public health promotion and aims at the general public. This likewise holds for potentially modifiable lifestyle risk factors and biomarkers indicating susceptibility. This commentary argues that from a public health ethical perspective, there is a significant overlap between the implications and requirements of the biomedical domain and lifestyle approaches. What's more, once public awareness of Alzheimer's disease prevention or risk reduction is further established, the public will likely intermix options and advice. Public health ethical recommendations should pro-actively reflect on upcoming questions, concerns, and remedies, combine but not separate both domains and anticipate their conceivable interactions.