Foods that can effectively lower blood sugar include bitter melon, onions, carrots, black fungus and loofah. Bitter melon has bitter melon saponin in it, which functions like insulin to lower blood sugar and also stimulates the release of insulin from the pancreas. Eating 1-2 meals of boiled bitter melon daily can effectively control blood sugar. Onions are rich in nutrients, and the selenium in them can help repair the function of the pancreas and stimulate the pancreas to secrete insulin. The sulforaphane in onions can strengthen the cellular utilization of sugar and effectively reduce the concentration of sugar in the blood. There is a large amount of beta carotene in carrots, which can help the repair of pancreatic islet function like selenium and remove the accumulation of free radicals, thus strengthening the control of blood sugar. The fungus polysaccharide contained in black fungus has a good function of lowering blood sugar, and the ingredients in loofah can help the pancreatic islets to improve their activity.