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PTH calcium and Vitamin D test

Posted by brendammc @brendammc, Nov 10 9:59pm

Does it matter what time of day the blood draw is done?

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gaylepbarnett | @gaylepbarnett | Nov 11 2:49pm

My understanding is it must be done first thing in the am, fasted. Also, there might be some supplements you need to skip for several days before, like Biotin, but ask your doctor about that.

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brendammc | @brendammc | Nov 11 3:48pm
In reply to @gaylepbarnett "My understanding is it must be done first thing in the am, fasted. Also, there might..." + (show)
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My understanding is it must be done first thing in the am, fasted. Also, there might be some supplements you need to skip for several days before, like Biotin, but ask your doctor about that.

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@gaylepbarnett I decided to Google and it said to do what doctor recommended about fasting. (Mine had said it wasn’t necessary.) So guess I’ll do earlier in the am. Probably also helps to be consistent as I have a few more tests to go. Thanks.

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gently | @gently | Nov 11 9:36pm

Most accurate in the morning between 8 and 10 after a 12 hour fast.

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