Black mulberry usually refers to sun-dried dried mulberries, soaked in water to drink has the effect of tonifying blood, hair, relieve visual fatigue and so on. Blackberry water has the effect of replenishing blood, hair, relieve visual fatigue and so on. Because blackberry water contains a variety of amino acids, vitamin B1, vitamin B2, vitamin C, vitamin E and other vitamins. It also contains iron, zinc, calcium and phosphorus and other mineral elements, as well as carotene, fiber, pectin, glucose, sucrose and fructose and other nutrients. Black mulberry water drink although nutritious, but should not drink more, because black mulberry contains volatile oil on the digestive tract has a certain stimulating effect, will inhibit a variety of digestive enzymes in the intestinal tract, may lead to gastrointestinal discomfort. In addition, patients with diarrhea and pregnant women should be used with caution. It is recommended that when blackberry soak water to drink, should be according to personal preference to drink in moderation, not to drink more, so as not to cause discomfort.