Although grape seeds have certain benefits for the human body, some people may suffer from adverse side effects after consuming grape seeds due to the fact that everyone has a different constitution. First of all, if patients with bleeding tendency or coagulation disorders take grape seeds, it will cause the coagulation function in the body to decrease, leading to more and more serious conditions. Secondly, if a patient with poor health is taking health supplements to regulate after taking grape seeds, it will destroy the ingredients of the supplements, reduce the efficacy of the supplements, and also cause abdominal discharge, stomach pain and bloating. Then, because grape seeds contain a lot of tannins, they have a strong astringent taste, which can harm the digestive function of the body, especially for patients with poor gastrointestinal function, causing gastrointestinal discomfort, nausea and vomiting. In conclusion, there are many side effects of grape seeds, so if you need to take grape seeds as a supplement, it is recommended that you consult a physician and take them under the guidance of a physician.