Patients who take lutein in accordance with their doctor’s instructions as well as following the dosing criteria can take it for a long time without stopping it midway. However, in case of overdose, patients may experience adverse reactions. Lutein is a vitamin that is often found in food and is usually extracted from food. It has a certain protective effect on the eyes, in the case of following the standard of medication, long-term use of lutein is equivalent to the inner layer of the retina coated with a layer of sunscreen, can to a certain extent over the harmful rays, to protect the eyesight, it is possible to take for a long period of time, do not need to stop in the middle of the day. Lutein general daily dose of about 18 mg, if the patient overdose, can stimulate the gastric mucosa caused by gastric discomfort, such as regurgitation, nausea, acid reflux and other uncomfortable symptoms. It is recommended that patients take lutein in accordance with medical advice, do not use without authorization to avoid adverse consequences.