Finding excessive protein in the urine usually points to what?

1. Protein does not normally leave the glomerular capillaries, so urine carries only trace amounts. 2. Excessive urinary protein usually means the glomerulus is damaged and leaking protein into the filtrate. 3. A random sample should show only about 10 mg per 100 mL, the healthy trace level. _Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 25 "The Urinary System", section Nephrons and Vessels_