1. Counterfeit blueberries: Blackcurrant raisins and dried cranberries are often counterfeited. Blackcurrants are mostly oval with sweet fruit stalks; Blueberries are mostly round and stemless, with sweet and sour taste; The color of cranberries is red, and the dry colors of blueberries are purple and black.

2. Has the juice been squeezed? The price of dried blueberries ranges from 100 yuan to 200 yuan, and the difference lies in whether the juice has been squeezed. According to the grades of not juicing, juicing once, juicing twice and juicing three times, the price is decreasing. For example, the high-end brand Wallin's dried blueberry claims that "the raw materials that have been squeezed are not used";

3. Origin: Blueberries imported from North America have large output and good taste; The output of blueberries in Shandong Peninsula is increasing year by year, and the taste is good. Blueberries in Daxinganling and Changbai Mountains are more nutritious than imported blueberries and blueberries in hilly areas of Shandong Province. The pure wild blueberries in Daxing 'anling and Changbai Mountains have the best nutrition, but the lowest yield and the worst taste.

4. Processing technology: Dried blueberry belongs to candied fruit, and it is normal to add fructose, fruit juice, oil and other ingredients in the production process;

5. Price: 100 yuan is relatively normal, and the quality cannot be guaranteed if the price is too low;