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Prostate cancer is the most common cancer in men over 50. The SELFCheck Prostate Health Test is a quick and easy way to check at home whether you have abnormal levels of prostate specific antigen (PSA) in your blood. PSA is a protein made by the prostate gland in men and is naturally secreted at low levels into the blood stream. A higher than normal PSA level can be due to enlargement of the prostate gland, prostatitis or a urine infection. It is also an early indicator of prostate cancer. The level of PSA is the most valuable blood test currently available for the early diagnosis of prostate cancer although PSA can also be elevated in other conditions. Prostate cancer is less common in men below the age of 50 and the average age of diagnosis is over 70. A PSA test can provide indication of a pre-clinical condition before symptoms develop.