Do I need to worry if my specific gravity (urine) is 1.005?
No, you do not need to worry. 1.005 is considered normal.
One can drink a glass of water before the urine test if they feel thirsty.
Urine samples can detect a number of conditions such as pregnancy, chronic kidney disease, infections and screen for drug use too.
It varies from lab to lab. However, one can get the results in 24 hours.