| The accuracy of self-reported energy intake using the 24-hour daily recall method has been shown to be consistent across BMI levels: CONCLUSIONS:
Under controlled conditions, the USDA five-step multiple-pass method can Yes. We need controlled conditions. "No differences in PA [physical activity] and SB [sedentary behavior] were found across different BMI categories." [2] The parents of children recorded dietary intake for a week using the food weighing method. No. Please let the scientists weigh the food under controlled conditions. A European study where the childrens' parents were doing the reporting rather than the subjects themselves concluded: No. Please let the scientists weigh the food under controlled conditions. Studies on identical twins showed that caloric intake didn't account for differences in weight between twins. The ScienceDaily link does not give much relevant information. So they found sets of twins whose weight differs, and the gut bacteria composition differs. Interesting. What did they do next to disprove that caloric input determines body weight? Did they assign twins to certain diets to see how body weight changes? No, and the word "calorie" is not even mentioned at all. In fact, all I get from the article is correlation - lack or presence of certain types of bacteria is correlated with body weight. Here's an easy possible confounder: what if lack or presence of bacteria increases or lowers the appetite, causing caloric intake to change and thus leading to weight gain or loss? The Nutrition Science Initiative was developed to address the need for more clinical research in this area. [6] Yes. As long as all food is measured by the scientists and there is no possibility the participants are getting extra food elswere, or not eating what they are supposed to eat, I'm very eager to see the results. |