How low is "low sodium" when starting a low sodium diet with 145/89 blood pressure?

Different approach: It's very hard to measure the sodium in your diet outside of a research protocol. Try this instead: never add salt at the table unless you've tasted it and you have to have it. Avoid known salty foods like potato chips, pretzels and salted nuts. Be careful about fast food and convenience foods which tend to be salty. Follow these steps and you'll be on the best low salt diet that's reasonable