Low-carbon diet with low water and high fat. The principle of Ogilvy & Mather's seven-day energy diet is a low-carbon diet with low-carbon water and high fat, which provides rich fat components and satiety for the body, replaces sugar with fat to provide energy for the human body, and changes the body from sugar burning mode to fat burning mode, thus consuming body fat and achieving the purpose of slimming. Losing weight belongs to a behavior pattern aimed at reducing excess fat and weight of human body.