DELTA AMINO LEVULINIC ACID

Collect urine after 4 hours of urinary retention.

Hygiene of the genitalia with soap and water. Discard the 1st stream of urine and collect the middle stream in a flask protected from light;

Women cannot use vaginal cream and/or ovules in the 48 hours before the exam and, ideally, should collect the sample outside the menstrual period.