Is it normal for dragon fruit to eat too much urine and be red?

Red pitaya contains a

large amount of betain pigment, which is a plant pigment that is difficult to digest by the human body and is usually excreted with urine. At this time, it is a normal physiological phenomenon. White pitaya does not contain betain pigment. If red urine appears after eating, it is considered to be caused by ureteral stones, cystitis, bladder cancer and other diseases

.