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My hyperparathyroidism's worsening it seems. Surgery ahead?

Diabetes & Endocrine System | Last Active: Mar 23 6:35am | Replies (35)
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@raybey

Does diet and fasting effect lab results? Sometimes, depending on what I eat or don't, prior to labs can impact the numbers. This has been true for blood pressure, sugar monitoring, or medications taken. Just curious since my thyroid is new area of concern.

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Replies to "Does diet and fasting effect lab results? Sometimes, depending on what I eat or don't, prior..."
Laurie, Volunteer Mentor | @roch | Feb 20 5:23am

raybey | @raybey
One supplement that may affect thyroid test is biotin, which can be found in some multi-vitamins. Biotin use can result in falsely high levels of T4 and T3 and falsely low levels of TSH. You may want to stop taking biotin for at least 2 days before thyroid testing to avoid the risk of having a misleading test.

Also, if taking thyroid meds (levothyroxine); iron, calcium supplements and antacids can lower your body's ability to absorb levothyroxine, so should be taken 4 hours before or after.

Laurie

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