This review looked at new ways to track what people eat and how their bodies react. Instead of just asking patients what they ate, these tools use smart sensors, blood tests, and other data to get a clearer picture. This helps solve a common problem where people forget or guess about their food intake.
Using many types of data together makes the information much more reliable. Wearable devices can count steps and measure heart rate, while lab tests show how the body handles different foods. When combined with simple surveys, these tools create a complete story of a person's daily habits and health status.
Researchers say these methods can be used by doctors, app makers, and health officials. By fixing common mistakes in how we measure diet, everyone can get better advice. This leads to plans that actually work for real people trying to eat healthier.