Serum blood tests should never be used to determine anyone's way forward, regarding any medications or radical treatment plans. Here's a few ways how fucked up it can be: 1. If you're in the midst of a rapid weight-loss program, your LDL and triglyceride scores might sky rocket. Your average Primary Doctor will see this, and want to test you again in a little while and then if it's high again, put you on statins...which are pretty horrible for you. But these are the scores you'd EXPECT during a time of rapid weight-loss. LDL is a "carrier," they call it a boat actually...and your body needs more carriers to transport your stored, BAD fat out of your system when there's more being freed up and converted to energy. Youre burning fat, amd your serum "snapshot" at this moment in time may call you wholly unhealthy and at high risk for hesrt disease based on conventional 'wisdom.' A second example is gfr on a serum test...it measures kidney function. On the standard serum blood test..they measure creatinine which is a waste product and they use a formula to determine your "guesstimated" kidney function. Its wholly inaccurate...but they...USE IT! Doctors that work SPECIFICALLY with athletes will automatically ignore the serum creatinine being elevated. It will always be elevated if youre exercising intensely... but if youre exercising as an athlete, but working with a REGULAR primary...theyll send you for a battery of follow up tests and even advise you to alter your diet. Based on this one little snapshot, and incomplete knowledge. Its gross because it costs assloads of $$$$$$ unnecessarily...takes you through the ringer. The true test of kidney function would be a 24 hpur creatinine elimination test. A before and after...not just a snapshot of current serum level. Theres tons of these stories...but thats just a couple for anyone interested in this crap.