Thermal constitution is not suitable. Because Lycium barbarum has a strong warming effect, people with hot constitution are prone to get angry, especially when eaten raw. Lycium barbarum has the function of warming and nourishing the body at the same time, so people with damp heat and phlegm in the body, such as high blood pressure, impatient temper, people who eat more meat on weekdays, and people with colds, fever, inflammation and diarrhea, had better not eat it, otherwise it will not only fail to achieve the health-keeping effect, but may also aggravate the condition.

During the period of cold and fever, it is not suitable to eat Lycium barbarum, which is a hot food. Cold and fever are debilitating and internal fire is flourishing. Eating Lycium barbarum or soaking in water will aggravate the condition of cold and fever. Inflammation occurs in the body during a cold. People during inflammation, whether taking Lycium barbarum orally or soaking in water, will aggravate inflammation and even induce other adverse symptoms.

Hyperglycemia is not suitable, and Lycium barbarum itself has a high sugar content, which is not suitable for diabetics. In addition, in daily life, some patients with hypertension and people with short temper had better eat less or not, because these people belong to warm constitution, and it is easy to cause internal fire to rise after taking Lycium barbarum, and there will be cases of excessive liver fire and excessive internal heat.

It is not suitable for the weak digestive function. In Compendium of Materia Medica, it is mentioned: "People with cold phlegm in the spleen and stomach and diarrhea are not suitable." For people with spleen deficiency, if you often soak in water with medlar, it is easy to cause more cold phlegm stagnation in the spleen and stomach, leading to indigestion. People with yin deficiency constitution, such as body fat, greasy fur, fear of cold, don't want to drink, and those with spleen and stomach deficiency and cold can't eat medlar!

Note: Don't overeat Lycium barbarum. Generally speaking, it is more appropriate for healthy adults to eat less than 20 grams of Lycium barbarum every day as health care. Lycium barbarum can mainly nourish liver and kidney. If your liver and kidney are not empty, there is no need to take it.