After eating red dragon fruit urine becomes red usually for the normal situation, mainly because the red dragon fruit contains pigment is betaine heme, such pigment is not easily degraded by the body, but has water solubility, so it will be excreted through urine, stool and sweat glands, etc. After eating red dragon fruit, the amount of betaine heme contained in urine is larger, it will show red urine. Urine is the final link of the body’s water and blood metabolic cycle and contains part of the metabolites. If there are natural pigments of the fruit in the metabolites, the urine will appear in color. The pigment contained in most plants is anthocyanin, which is easily oxidized, so intake does not generally lead to significant color changes in urine. The pigment contained in the red dragon fruit is beet heme, beet heme is more stable, the beet aldehyde contained in it is not easy to be degraded by the body, and has strong water solubility, it will enter the blood circulation with the body’s metabolic discharge, thus leading to red urine after eating red dragon fruit. In addition, the color shade of beet aldehyde excretion varies from person to person, in different individuals, the absorption of natural pigments, decomposition and metabolic capacity will be different, the body is weaker, poor metabolic capacity of people, excretion discoloration will be more obvious. If after eating red dragon fruit urine color becomes red, later drink more water, replenish the body water, the body contains the pigment after a lot of water dilution, urine color will gradually return to normal, so do not need to worry too much. However, after eating red dragon fruit, urine for several days in a row are red, may not be after eating red dragon fruit caused by the phenomenon, it is recommended to promptly go to the hospital to check, to rule out the existence of urinary tract infection, stones and other abnormalities.