A new preliminary study has found that health issues in your 20s may lead to having problems with thinking memory skills and the brain's ability to properly regulate its blood flow as you grow older. Health issues such as smoking high cholesterol or a high body mass index (BMI) in your youth may make you more likely to have a weak brain in your older age. These results indicate that people need to pay close attention to their health even in their early 20s said study author Farzaneh A. Sorond M.D. Ph.D. of Northwestern University Feinberg School of Medicine in