Add vitamin D to achieve our target serum level . . . HDL jumps to 50, 60, 70, even 90 mg/dl.
The first few times this occurred, I thought it was an error or fluke. But now that I've witnessed this effect many dozens of time, I am convinced that it is real. Just today, I saw a 40-year old man whose starting HDL was 25 mg/dl increase to 87 mg/dl.
Responses like this are supposed to be impossible. Before vitamin D, I had never witnessed increases of this magnitude.
"A recent article in the New York Times highlighted an ongoing problem with the accuracy of vitamin D testing at the largest commercial clinical laboratory, Quest Diagnostics. It has become clear from shared experience among vitamin D experts, including myself, that Quest Diagnostics has a problem with seemingly random over-estimation of vitamin D levels."