Depression and anxiety are not always easy to detect. Symptoms can range from worry to chronic indecision. Thus, an easily detectable biomarker for would be preferable, and Chinese scientists believe they have found one using a urine test.
Dehydration can be dangerous for the elderly, since their thirst mechanisms and kidneys may not be as well tuned in to the body's status as compared to those of younger people. But the current urine tests don't accurately reflect what's happening in the body, according to a recent study.