Hawthorn water itself is no toxic effect, long-term drinking hawthorn water has many benefits. However, hawthorn water has certain contraindications, unsuitable physique long-term drink hawthorn water will indeed bring some non-negligible harm.1, will hawthorn soak water to drink also has to promote blood circulation and eliminate the role of blood stasis, women in the menstruation of two days before drinking some hawthorn water, can help discharge the body of the blood and alleviate menstrual cramps.

2, some research experiments have proved that, from hawthorn can be extracted to block the synthesis of nitrosamine, nitrosamine is a strong carcinogen, in addition, hawthorn can also inhibit aflatoxin on the human body's carcinogenic effect, so long-term drinking hawthorn water is also have some anti-cancer effect.

3, hawthorn is rich in flavonoids and triterpenoids, has the effect of regulating the heart muscle, expanding blood vessels, reducing serum cholesterol. After immersing hawthorn into water, these substances will not be affected and can also be completely absorbed by the body, so drinking hawthorn in water can help prevent cardiovascular and cerebrovascular diseases.

1, gastrointestinal disease patients should not drink hawthorn water on an empty stomach, hawthorn water will stimulate the secretion of gastric acid, gastrointestinal problems themselves on an empty stomach or a large number of drinking hawthorn water, gastrointestinal tract will be overwhelmed, aggravate the condition.

2, pregnant women also can't drink hawthorn water, pregnant women take hawthorn water easily to their own health and the development of the fetus damage, long-term drinking hawthorn water may also lead to pregnant women have a miscarriage

3, the elderly and children are not recommended to drink hawthorn water, hawthorn water will stimulate stimulate the gastric mucous membrane, and the old people's intestines are not good, children's intestines and stomach has not yet fully developed, long-term drinking hawthorn water easily damage stomach qi, lead to digestive system, and the gastric tract will be overwhelmed and aggravated. The long-term drinking of hawthorn water is easy to damage the stomach qi, leading to the decline of digestive function. In addition, hawthorn contains more acidic substances, so drinking concentration can not be too high, so as not to damage teeth.