1, fresh Lycium barbarum varies in color due to different producing areas, but the color is soft, shiny and full of meat; However, the dyed Lycium barbarum is mostly old goods from previous years. From the sensory point of view, the meat quality is poor and dull, but the appearance is bright and attractive. Therefore, when buying Lycium barbarum, you must not be greedy for "color".

In particular, the whole dyed Lycium barbarum L. is red, even the small white spot at the stalk of Lycium barbarum L. is red, while the stalk at the tip of normal Lycium barbarum L. is mostly yellow or white, the stalk of Lycium barbarum L. dipped with pigment is red, and the stalk baked with sulfur is dark brown. Because the Chinese wolfberry dyed with pigment is particularly afraid of water, you can put a few Chinese wolfberry into the water when buying Chinese wolfberry, or rub it with wet hands on purpose. If the color fades, it means that the pigment has been used.

2. Distinguish from the shape

Both Ningxia Lycium barbarum and Inner Mongolia Lycium barbarum are oblong, but Ningxia Lycium barbarum will float up after soaking in water, and Inner Mongolia Lycium barbarum will sink, while Xinjiang Lycium barbarum is round and easy to distinguish. These kinds of Lycium barbarum are all top-grade with big and full grains. Many merchants use this method because it will make Lycium barbarum fruit bigger after soaking in alum.

However, Lycium barbarum soaked in alum is easy to distinguish. If this kind of Lycium barbarum is irradiated with light, there will be shiny crystal points on the surface of the medicinal materials; In addition, "poison medlar" feels sticky, while natural medlar is dry.

3. Distinguish from the smell

For the Chinese wolfberry fumigated by sulfur, just grab a handful and cover it with your hands for a while, and then put it under your nose to smell it. If you can smell the pungent choking smell, you can be sure that it has been fumigated by sulfur.

4. Distinguish from the taste

Ningxia Lycium barbarum is sweet, especially sweet to eat, but it has a bitter taste in its throat after eating; However, Lycium barbarum in Inner Mongolia, Xinjiang and other places is a little greasy, and the Lycium barbarum soaked in alum will taste bitter when chewed. As for the Lycium barbarum soaked in sulfur, the taste is sour, astringent and bitter.

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