Actress Hilary Duff has been posting on Instagram about the macro diet, whose followers track what they take in each day. The idea is to eat the right amount and the correct ratio of fat, protein ...

Best macro tracking apps. Czerwony warns to be cautious when going online to find health information, but says there are a lot of good macro and food tracking apps out there.

Your macro ratio depends on your health and fitness goals, as well as how your body responds to particular foods. For example, many people thrive on a low-carb diet, but the thought of a low-carb ...