บท 401: Chapter 368: The 4th Person

The urine of a normal person is usually colorless, transparent, or slightly yellow, and although it contains a large amount of metabolic waste, it is free of bacteria, so it can be drunk.

Furthermore, normal urine is weakly alkaline, so if a person who pursues health must drink weakly alkaline water, urine can also be one of the choices.

At the same time, urine can provide a great deal of information. Hospitals can use it for urinalysis, and forensic departments can use it to extract DNA.

Urine contains a small amount of exfoliated cells, which can be used for DNA comparison.

However, amateurs look at the threshold, while professionals should not feign ignorance.

It's true that DNA can be extracted from urine, but it's much more difficult than from blood. To start with, the number of exfoliated cells in urine is relatively low, which means a larger volume of urine is needed for convenient extraction.