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.
Blood tests can determine whether a person is lacking hormones (such as thyroid or growth hormone) that are needed for growth or has a genetic problem that affects height. An X-ray of the hand and wrist can show how mature a person's bones are and help predict how much longer he or she will continue to grow. If a lack of growth hormone or very short stature is recognized before the bones stop growing, regular hormone injections may help a child reach a greater height by adulthood.