Use of synthetic steroids, various supplements and/or high doses of biotin may interfere with the accuracy of the standard immunoassay Testosterone Total serum test included in this panel. If you are taking any of these it is recommended that you order a panel that includes the Testosterone LC/MS-MS methodology for testing.
Significant deviations from the normal range may require further evaluation by your physician.
Follicle-Stimulating Hormone (FSH)
Testosterone, Free (Direct), Serum With Total Testosterone
Note: If total testosterone results are expected to be >1500 it is best to order a panel that includes the LC/MS-MS methodology for total Testosterone. Reporting values that exceed 1500 will now be reported as >1500 for all regions, as this standard operating procedure will now be nationwide.
Patient Instructions: If using a testosterone cream please be sure you have not rubbed any into the antecubital area of your arm for the last 24 hours as it can give elevated results. Some tests in this panel may exhibit interference when sample is collected from a person who is consuming a supplement with a high dose of biotin (also termed as vitamin B7 or B8, vitamin H or coenzyme R). It is recommended to stop biotin consumption at least 72 hours prior to the collection of specimen.