In a clinical setting when you know what you're looking for, blood tests are great. Randomly running panels on yourself, you'll have a hard time distinguishing

In a clinical setting when you know what you're looking for, blood tests are great. Randomly running panels on yourself, you'll have a hard time distinguishing signal from noise. Or even worse interference. Say, taking high doses of Biotin is known to interfere with many tests. By all means, I'd rather have that data on myself than not. But I can see why the doctors wouldn't be too crazy about it.