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.
As you get older, your MHR typically decreases. The most accurate way of determining your MHR is a stress test. Since this method is not practical for many, the simplest way to estimate your MHR is to subtract your age in years from 220. So, if you are 40 years old, your estimated maximum heart rate is 180.