Why can’t a single blood test show you all the information you need instead of having to take multiple tests for different markers?
In: Biology
For some, it’s because the concentration of compounds you’re looking for is so small that a larger quantity of blood is needed. For example, if you’re looking for a compound that occurs at a concentration of 1 molecule per ml of blood, you need enough blood so that you can reliably find enough molecules to confirm the concentration.
For others, it’s because often the act of running a test on a given sample taints the sample and prevents other tests from being run on it, therefore you might need four or five samples to ensure that each test is run on untainted blood.
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