It has been used in traditional Asian medicine for centuries. Since decades, serum PSA is the most important biochemical test for diagnosing and monitoring patients with PCa. While phi is FDA-approved in men who haven't had a prostate biopsy, PCA3 is indicated for men who have had one or more negative prostate biopsies and a repeat biopsy is being considered. It took 5 days for pretty much complete elimination of the congestion and any other symptoms. The FDA doesn't regulate the way supplements are made so there may be differences between brands and batches. Before the ingredients were chosen for manufacturing, they underwent extensive research. If your PSA level is moderately elevated, your doctor may recommend that you schedule PSA tests and monitor for any changes in the PSA velocity. Sometimes nerves must be cut in order to remove the cancerous tissue.