One and a half year old baby is allowed to drink soy milk, soy milk can strengthen the body. One, one hundred grams of soy milk contains 4.5g of protein, 1.8g of fat, 1.5g of carbohydrates, 2.5g of iron, 2.5g of calcium, and vitamins are great for strengthening the body. Second, is to prevent diabetes, soy milk contains a lot of fiber can effectively organize the excessive absorption of sugar, reduce sugar, and therefore can prevent diabetes. Third, is to prevent hypertension, soybean milk contains soy sterols and potassium, magnesium is a favorable anti-salt sodium substances, sodium is one of the main root causes of the occurrence and recurrence of hypertension. If the body can properly control the amount of sodium, can prevent hypertension. Fourth, is to prevent coronary heart disease, soybean milk contains soy sterols and potassium, magnesium, calcium, can strengthen myocardial vascular excitation, improve myocardial nutrition, lower cholesterol, promote blood flow, prevent vascular spasm. Fifth, is to prevent stroke, soy milk contains magnesium, calcium elements can significantly reduce cerebral blood lipids, improve cerebral blood flow, effectively prevent the occurrence of cerebral hemorrhage.