For human beings to be healthy, body fluids (blood and cell fluids) need to be kept weakly alkaline.Modern eating habits tend to take a lot of high-calorie acidic foods (meat, fish, bread, rice, eggs, beer) that are usually easy to take. Conversely, alkaline foods (plum, vegetables, milk, apples, seaweed) are difficult to take. In such a case the ume of the king of alkaline food is useful. For example, if you eat 100 grams of beef, you have to eat 900 grams if it is cucumber to neutralize it, but if it is ume, you can neutralize it by only 5 grams.