First, smell the odor. Healthy bean sprouts smell fresh, and those with a particular odor such as urea are not normal.

Secondly, look at the looks. Selection of bean sprouts can not just pursue "good-looking", bean sprouts growth has its natural laws, growing ugly is a normal phenomenon, generally good-looking bean sprouts added to the probability of a large number of prohibited substances, which is eaten with the green vegetables were insects, not particularly tender, indicating that the general did not use pesticides, fertilizers is a reason.

Third, to see the head. Problem bean sprouts in general the head is uniform, grow long and stout, look beautiful. Therefore, try not to choose bean sprouts that are too uniform in size and too thick and long, as such bean sprouts may have used additives.

Fourth, look at the shape. The person in charge of the introduction, healthy bean sprouts two pieces of beans is neatly merged, the problem of bean sprouts two pieces of beans was staggered, which is the most obvious difference between the healthy bean sprouts and the problem of bean sprouts; healthy bean sprouts color is slightly yellow, the problem of bean sprouts color white; healthy bean sprouts straight slightly fine, the problem of bean sprouts sprouts curved stout body. In addition, the healthy bean sprouts main root longer, and the main root of the long root, the problem of bean sprouts root short, less root or no root, no root, because of the use of the rootless growth hormone; generally natural cultivation of bean sprouts beans normal, and with chemical fertilizer soaked bean sprouts beans bluish.

If you're still not sure, then use the fifth trick: pinch the bean sprouts or break the stalks, stem surface or section of the no moisture out of the natural cultivation of healthy bean sprouts, there is moisture out of the problem may be soaked with chemical fertilizer bean sprouts.