Allergies, so they don't ingest something they are allergic to.
Eat healthier food
Regular exercise
Make sure to get sufficient sleep
Your audience should probably be adults. If adults learn the healthy habits of eating they can pass it on to their children and friends. Maybe posters or news segments could work to spread the news. This idea could work because adults watching the news segment and Billboards will choose not to pick up that snickers in the grocery store check out but instead trail mix.
Thats all you will need, just elaborate a bit more!
145/70 is a higher blood pressure
