“Mushrooms contain a variety of fibres that are known to slow gastric emptying and fill you up more quickly than other foods, including meat. In one study at the University of Minnesota, researchers found that people given 425g of white button mushrooms a day for ten days reported feeling significantly less hungry and said they ate less in the hours after eating compared with others given the same relative quantity of beef. Substitute meat for mushrooms in soups, stews and casseroles.”
425 grams of mushroom every day for ten days seems a tad over the top mind you