During the study, the participants kept a detailed record of what they ate in a day. It included the macronutrients and calorie intake. They also kept a detailed log of calories, fat content, protein content and carb level in every food item they added to their plate. Apart from that, they were also asked to mention the portion size and preparation method for a clearer picture. It doesn’t matter who spends most of the time noting down the details, but what matters is who is consistent about it.