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.
1 It lets you see how your personal fitness level matches up with the fitness of other people your age.  A home step test (loosely based on the Canadian Home Fitness Test) is another simple test that allows you to gauge fitness level. This test is designed to measure your cardiovascular endurance. Using a 12 inch high bench (or a similar sized stair in your house), step on and off for 3 minutes.