Each time you put it back it will come out again even more concentrated and that is normal output adult urine average good for health as it could damage the gut," she told The Independent. Decreased Urine Output Decreased urine output or oliguria is a condition that causes the body to produce less than millimeters of urine a day. Urinary Frequency. A normal fluid intake is between cc's oz. Frequent urination is the need to urinate more often than what's normal for you.