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Blood test and vitamins- do you take vitamins before testing



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I switched to a new surgeon for my annual follow up appointments.

Previously I would skip my Multivitamin I normally take at night (it has Biotin in it as well) the night before my labs and I am fasting when I go in for labs that morning.

The new surgeon (well the nurse I spoke with) said to take my Vitamin as normal the night before and I don't need to fast.

What does everyone else do?

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I take my last nightly Vitamin at 7pm usually. When I do my labs I go when it opens at 7am. I, personally, choose to fast. I take my thyroid meds the second they're done doing my blood work and thirty minutes after that I eat. Then I have to wait 4 hours to take my first multi because of the stupid thyroid meds... I usually set my alarm on normal days and take my thyroid meds at 5am and then go back to sleep so I can take my multi's after Breakfast and my whole routine isn't thrown off. I really hate lab work days... they throw everything off!

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the only time I've had to fast before labs is when they're testing glucose, which I don't think they've done with my bariatric panel in quite awhile. Although I've sometimes been asked before a "surprise" blood test (like when I go to my PCP for some issue and she orders a blood test) how long it's been since I've eaten -- they can still test glucose level, evidently, but I'm guessing they do something different if you haven't fasted.

the PA at my bariatric surgeon's office once recommended that I stop taking Vitamins a couple of days before my annual bariatric panel, but honestly, I'm not sure why he recommends this since I take vitamins every day and have for almost six years. So whatever my Vitamin levels are on any given day is my "norm". The only vitamin I take that's not a daily thing is B12 - I take a megadose every two weeks. So I try to schedule my labs in the middle of the two-week cycle, since having labs done a day or two after I take my B12 could show that I'm really high in B12, which may not be my "average", if that makes sense.

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I'm nothing by mouth after midnight (no Water, no food, no Vitamins - but I when I was taking them, I took my multi in the mornings, so....). Also, all my appointments have been in the mornings, so it may be different if they were later in the day...

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