Blueberry is one of the fruits with the highest anthocyanin content, blueberry drink in the United States and the European Union is very popular functional drinks, these years in the country is just popular, the beginning of a few factories to do business is particularly red-hot, so people have to follow suit, a lot of quick success, many of the manufacturers are made entirely with flavoring, I provide a little bit of their own accumulated experience for your reference, please understand that is not right. A: blueberry drink for light red, pour it on a white towel is red, the original juice content of more than 80% of the blueberry drink, dry towel will be blue, while the fake is still red. If, the original juice content in more than 30% of the blueberry drink, in the white towel shows light blue. Second: look at the manufacturer, because it is difficult to preserve fresh blueberries, fresh fruit required to be preserved at minus 20 degrees. Fresh fruit prices in the origin of the basic wild fifteen dollars a kilogram, planted thirty dollars a kilogram. That is to say, 300ml of blueberry drink, if the content of the label in 30%, the cost of raw materials to be wild 1 yuan, planted 2 yuan, plus packaging and wages at least 2 yuan and 4 yuan, plus factories and sellers of profits and transportation costs, the price is too low the product should be a problem. Third: the country has no clear standards for the time being, however, there are still standards for food and beverages, when shopping, be sure to look at the content and composition!