What is the best way to check urine for proteins?

Question
What is the procedure for checking urine proteins. One doctor advised me to collect urine for 24 hours while another doctor advised to collect urine from 10:00 PM to 7:00 AM. What is the best medicine for high level of proteins in urine for a diabetic person whose blood sugar is always under control? He is not taking any protein rich foods, is exercising, taking proper medicines for blood sugar (type 2 diabetic) is a vegetarian and otherwise in good health. He is 64 years old and has an active life style.
Expert Answer
S
The best method is 24-hours urinary protein. Short-term collection can also be done but then the result is expressed as - mg/gm creatinine. Once kidney starts leaking protein in a diabetic, there is no way to stop it. Drugs may help to lower the loss but can't stop it. Good control of blood pressure, blood sugar and use of ACE-inhibitor drugs can help to some extent.