Plasma is a critical component in the treatment of many serious health problems. This is why there are frequent blood drives encouraging people to donate blood plasma.
A simple blood test can now be used to estimate your 'biological age'. Biological age, unlike chronological age, looks at how your body id developing or breaking down compared to the average. Knowing this can help identify the people most at risk of age-related diseases, such as dementia.
The short answer is, no. The PSA (Prostate Specific Antigen) is a simple blood test that can indicate a prostate problem. Usually, after a man reaches 40 years of age his primary care doctor will do a blood test to determine if his PSA is normal for his age.