It’s time to brace yourself for the season of fad foods and trendy diets to fight the holiday bulge: The time between Thanksgiving and New Year's accounts for a fork-dropping 75 percent of the extra weight we gain during the year.
Unfortunately, as anyone who’s tried to diet knows, finding one that actually helps you shed pounds is next to impossible, and a new study has finally found out why — and it’s going to change everything we thought we knew about nutrition.
When it comes to recommending diets, doctors and nutritionists often rely on foods’ glycemic index (GI), which estimates how much a person’s blood sugar is expected to rise based on the amount of carbohydrates in the food.
Instead of GI being an intrinsic property of the food, the Personalized Nutrition Project found that blood sugar responses differ between people who ate the same thing.
“Most dietary recommendations that one can think of are based on one of these grading systems; however, what people didn't highlight, or maybe they didn't fully appreciate, is that there are profound differences between individuals — in some cases, individuals have opposite response to one another," says study co-leader Eran Segal with the Weizmann Institute of Science.