A major new Harvard study shows that reducing carbohydrates and replacing them with fats speeds up metabolism. The research helps to overcome one of the biggest hurdles in conventional weight-loss diets. The “plateau” — a metabolism slowdown — prevents further weight loss for people on conventional diets. Lead author of the study published in the BMJ (British Medical Journal) is Dr David Ludwig, a nutrition professor at Harvard’s TH Chan School of Public Health. He says that the new study shows that “the case against carbohydrates is growing”. Experts describe the randomised study as well-designed. Randomised controlled trials enjoy a reputation as the gold standard of scientific research. Research by US-based Virta Health, published in Diabetes Review in February, and experts say the Harvard study dishes up a recipe for fast, effective, safe and sustainable weight loss. The Harvard scientists say their study is one of the “largest feeding studies ever conducted”. They avoid dealing...

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