Author: Tim Spector

GI diets don’t work – gut bacteria and dark chocolate are a better bet for losing weight

  The mainstays of most of the diet regimens of the last 30 years have been the GI (glycaemic index) rating score as well as its cousin the glycaemic load. Famous best-selling diet books such as the G-Plan Diet, the South Beach diet all used the index in some way and changed the way we thought about carbohydrates. Now a detailed new study published in Cell pays this score – and how we use it – some closer scrutiny. The GI theory goes that there are many different types of carbs and they can be graded into how rapidly the body converts them into glucose. The faster the burn rate, the higher the index and the more rapid the rise in blood sugar. This surge in blood sugar also triggers a rise in insulin and the combination of these events if sustained over time is believed to lead to unhealthy metabolic changes leading eventually to obesity and diabetes. This nutritional dogma has been the backbone of the advice to avoid eating high GI foods such …