BLOOD SPOT TESTING
Dried blood spot is a form of collection where patients place blood drops on a filter card after a finger prick with a lancet. Once dry, blood spot cards are extremely stable for shipment and storage, and the dried blood format offers excellent correlation with serum tests.
Blood spot is ideal for measuring hormones and other analytes such as insulin, blood lipids, Vitamin D, thyroid hormones, and elements like magnesium. It offers distinct advantages over serum because it eliminates the need for a blood draw – saving patients time and money.
ZRT developed the science for accurately measuring hormones in dried blood spot and is currently one of the only labs to offer this method commercially.
ZRT's convenient blood spot collection eliminates blood draw needles, blood draw fees and the need to see a phlebotomist. Patients can collect their sample at home at the time that suits them. Research also shows that blood spot is more accurate than serum for measuring blood hormone levels in patients supplementing topically.
Review our Testing & Supplementing Guide
Study comparing progesterone supplementation with saliva, blood spot & serum testing
Unlike other labs, patients do not need to stop hormone supplementation to use ZRT’s testing because we have ranges adjusted for age, menstrual status and supplementation types. This is the ideal method for tracking the effectiveness of hormone treatments.
Webinar: Unraveling the Confusion
Blood Spot Test Kit Includes:
Expanded! Female Blood Profile I – E1, E2, E3, Pg, T, DS, C & SHBG (learn more)
Female Blood Profile II – E2, Pg, T, DS, C, SHBG, TSH, fT3, fT4 & TPOab (Sample Report)
Expanded! Male Blood Profile I – E1, E2, Pg, T, DS, C, SHBG & PSA (learn more)
Male Blood Profile II – E2, T, DS, C, SHBG, PSA, TSH, fT3, fT4 & TPOab
Hormone Trio – E2, Pg & T
Essential Thyroid Profile – fT3, fT4, TPOab & TSH
Elite Thyroid Profile – T4, Tgbn, fT4, fT3, TPO & TSH
Toxic & Essential Elements - Blood Profile – Hg, Cd, Zn, Cu, Se & Mg (Sample Report)
CardioMetabolic Profile – Insulin, hsCRP, HbA1c, TG, CH, LDL, HDL & VLDL (Sample Report)
Vitamin D Profile – 25-OH D2, 25-OH D3, Total
Saliva + Blood Spot Test Kit Includes:
Female Comprehensive Profile I – E2, Pg, T, DS & Cx4 (saliva); TSH, fT3, fT4 & TPOab (blood spot) (Sample Report)
Female Comprehensive Profile II – Cx4 (saliva); E2, Pg, T, SHBG, DS, TSH, fT3, fT4 & TPOab (blood spot) (Sample Report)
Male Comprehensive Profile I – E2, T, DS & Cx4 (saliva); PSA, TSH, fT3, fT4 & TPOab (blood spot) (Sample Report)
Male Comprehensive Profile II – Cx4 (saliva); E2, T, DS, SHBG, PSA, TSH, fT3, fT4 & TPOab (blood spot) (Sample Report)
Blood Spot + Dried Urine Test Kit Includes:
Comprehensive Thyroid Profile – fT3, fT4, TPOab & TSH (blood spot); I, Se, Br, Li, As, Cd, Hg & Crtn (dried urine) (Sample Report)
Comprehensive Toxic & Essential Elements Profile – Hg, Cd, Zn, Cu, Se & Mg (blood spot; I, Se, Br, Li, As, Cd, Hg & Crtn (dried urine) (Sample Report)
Weight Management Test Kit Includes:
Weight Management – E2, Pg, T, Cx4 (saliva); TSH, D2, D3, In, HbA1c (blood spot)
Weight Management + Thyroid – E2, Pg, T, DS, Cx4 (saliva); TSH, D2, D3, In, HbA1c, fT3, fT4, TPOab (blood spot)
Weight Management + Cardio – E2, Pg, T, DS, Cx4 (saliva); TSH, D2, D3, In, HbA1c, hsCRP, TG, CH, LDL, VLDL, HDL (blood spot)
Weight Management + Thyroid + Cardio – E2, Pg, T, DS, Cx4 (saliva); TSH, D2, D3, In, HbA1c, fT3, fT4, TPOab, hsCRPTG, CH, LDL, VLDL, HDL
ZRT Test Directory & Abbreviations
Dried Blood Spot Reference Ranges
LCMS Dried Blood Spot Reference Ranges
The Science of Dried Blood Spot Testing
