BLOOD TESTING

As your lab of choice, ZRT Laboratory offers a variety of sample type options to achieve optimal clinical results. To allow for the needs of you and your patients, we offer two options for blood testing: dried blood spot and serum. To learn more, choose an option below to get started.

 

DRIED BLOOD SPOT
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SERUM
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Dried 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.

Why measure in blood spot? Blood spot is ideal for measuring hormones and other analytes such as insulin, blood lipids, Vitamin D, thyroid hormones, and elements like lead and 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 the only lab to offer this method commercially.

No Needles, No Office Visit

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.

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HORMONE TESTING FOR DIFFERENT SUPPLEMENTATION TYPES

 

Webinar: Unraveling the Confusion

See the Profiles

Female Blood Profile I – E2, Pg, T, DS, C & SHBG

Female Blood Profile II – E2, Pg, T, DS, C, SHBG, TSH, fT3, fT4 & TPOab (Sample Report)

Male Blood Profile I – E2, T, DS, C, SHBG & PSA

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, Pb, 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

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)

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, Pb, Zn, Cu, Se & Mg (blood spot); I, Se, Br, Li, As, Cd, Hg & Crtn (dried urine) (Sample Report)

Fertility Profile – Cx4 (saliva); E2, Pg, T, DS, SHBG, TSH, fT3, fT4, TPOab, LH & FSH (blood spot) (Sample Report)

Weight Management Profile – E2, Pg, T, DS & Cx4 (saliva); TSH, Insulin, HbA1c & Vitamin D (blood spot) (Sample Report)

  • Thyroid add-ons – fT3, fT4 & TPOab
  • Cardio add-ons – hsCRP, TG, CH, LDL, HDL & VLDL
Reference Information

ZRT Test Directory & Abbreviations

Dried Blood Spot Reference Ranges

The Science of Dried Blood Spot Testing

FAQs

 


Serum Testing

Serum tests are performed by drawing blood from a patient and spinning it down to separate the cellular components from the liquid serum, which contains soluble analytes such as hormones. While lacking the convenience and long-term stability of dried blood spot, serum can be used to measure a wider array of analytes.

Why Measure in Serum?

Blood serum is a broadly accepted method for measuring hormones including steroids, thyroid and peptide hormones (e.g., LH & FSH). In certain cases, it offers a suitable alternative to measuring hormones in saliva, dried blood spot and dried urine.

Serum vs. Blood Spot vs. Saliva vs. Urine Hormone Testing

Serum testing is a reliable method for measuring endogenous hormones – those produced naturally by the body. For patients not supplementing with hormones, serum is just as accurate as any of the other testing methods offered by ZRT.

For patients who supplement with patch or pellet steroid hormones, serum testing is also a reliable method. However, for patients who supplement with oral, topical or vaginal steroid hormones, saliva and blood spot provide more accurate results. Refer to our Testing & Supplementing Guide below for recommendations on ideal uses for each testing method.

Review our Testing & Supplementing Guide

The ZRT Difference

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.

ZRT's reports include a range of patient symptoms, which provide deeper insight into patient conditions. We also include personalized comments created by an AI developed at ZRT that helps correlate hormone levels and symptoms to deliver real understanding. This is unique to ZRT – not something that any other serum testing lab can provide.

Download our Serum Sample Report

See the Profiles
serum test

Female Serum Profile – E2, Pg, T, DHEAS, C, SHBG, fT3, fT4, TSH & TPOab

Male Serum Profile – E2, T, DHEAS, C, SHBG, PSA, fT3, fT4, TSH & TPOab

Reference Information

Testing Catalog

Serum Reference Ranges

Female Hormone Profile

Male Hormone Profile

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