Normal fresh urine is mostly transparent, often light yellow or colorless, mainly because urine contains a large amount of urochrome, urobilinogen, urobilinogen, uroporphyrin and other components. Urine pigment is produced by the kidneys, and urine becomes non-yellow after drinking water, that is because when the volume of urine increases after drinking a lot of water for a long time, the color becomes transparent after the concentration of urine pigment decreases, and when the volume of urine decreases when drinking less water, the concentration of urine pigment increases and the color of urine becomes yellow. If urine is left for too long, the substances in urine will be oxidized to urine pigment and urine will become yellow. The fact that urine becomes less yellow after drinking water indicates that you do not drink enough water every day. You should increase the amount of water you drink and eat more fresh vegetables and fruits to effectively replenish the water in your body, form more urine, and make your urine clear. By urinating, a large amount of metabolites in the body can be eliminated, which is beneficial to health.