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but the doc said the spray is crap compared to their pills to boost it backup lol,
Everything I read about it says oral sprays are just as good if not much better if the person taking it doesn't have the best stomach
Also the NHS might prescribe you d2 pills instead of d3; apparently d3 is much better because it's exactly what your skin would make via sunlight, d2 is a plant product and leaves your system quicker, your body doesn't store it the same as d3.
Did he say you should stop using the spray for an amount of time before the blood test or no?
I did some research on it after doing my blood test to see if I should have left it longer than 36 hours, but 24 hours is apparently enough time to see what your baseline in (not 100% on this though as I couldn't only find one source)
https://www.livestrong.com/article/465017-does-the-body-store-vitamin-d/
According to a 2010 journal article published by "Pediatric Nephrology," vitamin D-2 and vitamin D-3 circulate in the blood for about 24 hours. Afterward, these vitamins are stored in the fat tissue for approximately two months. When the body needs more vitamins, vitamin D-2 and vitamin D-3 are converted to their active form called 25-hydroxyvitamin D. The active vitamin is then released into the blood
Another interesting thing I learned was that the blood test doesn't look for the vitamin D3 from the supplement, it looks for what your liver turned into the active form