If there is no mold inside the lotus root, you can eat it. Lotus root blackening is a normal situation, lotus root after peeling and air contact will appear oxidation reaction, this oxidation reaction itself is not toxic, so you can continue to eat. Lotus root is rich in carbohydrates, starch, protein and a variety of trace elements, 100 grams of lotus root contains 47 calories, 11.5 grams of carbohydrates, 1.2 grams of protein, 0.2 grams of fat, fiber 2.2 grams. Moderate consumption can supplement the body’s need for trace elements and protein. Lotus root has more carbohydrates in it, and eating it in excess can cause indigestion. People who are allergic to lotus root should be prohibited from eating it, and long-term consumption of large quantities may cause a burden on the gastrointestinal function. If the patient has any discomfort after eating lotus root with black color inside, he should go to the hospital in time, and actively cooperate with the doctor for treatment.