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Blood Spot Testing

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Blood Spot Testing

Blood Spot is the future of blood testing and is a convenient form of health and wellness testing.  The development and application of blood spot testing allows monitoring of hormone levels, cardiometabolic markers and Vitamin D.  The convenient collection of blood from a tiny nick of the finger, allows for flexibility of testing at the right time of day, month or following hormone therapy.  Blood Spot testing provides results on par with those from serum tests but without the cost and inconvenience of conventional blood draws, making it beneficial for both patient and practitioner. 

New!  Simple.  Reliable.  Easy.
ZRT Laboratory introduces the EZ MediCARE Kit into their product and services family.  The EZ MediCARE Kit will meet the needs of Medicare patients who are seeking coverage.  All analytes measured are Medicare eligible for coverage which means no out of pocket expenses for Medicare patients. 

Best Value

Blood Spot and Saliva Tests are also available in ZRT's Combo Test Kit. Learn More

Hormones and other substances we test in blood spot include:

  • Estradiol (E2)
  • Progesterone (Pg)
  • Testosterone, total (T)
  • DHEA-S
  • Cortisol (C)
  • Vitamin D: 25-OH Vitamin D2, 25-OH Vitamin D3, Total
  • IGF-1 (Somatomedin C)
  • Luteinizing Hormone (LH)
  • Follicle-stimulating Hormone (FSH)
  • Free Thyroxine (fT4)
  • Free Triiodothyronine (fT3)
  • Thyroid Stimulating Hormone (TSH)
  • Thyroid Peroxidase Antibodies (TPO)
  • Sex Hormone Binding Globulin (SHBG)
  • Prostate Specific Antigen (PSA)
  • Fasting Insulin
  • Total Cholesterol (CH)
  • LDL Cholesterol
  • HDL Cholesterol
  • VLDL Cholesterol
  • Triglycerides (TG)
  • Hemoglobin A1c (HbA1c)
  • High-Senstivity C-Reactive Protein (hs-CRP)

Profiles we offer in blood spot include:

  • Male Blood Profile I
    (E2, T, DS, C, SHBG, & PSA)
  • Male Blood Profile II
    (E2, T, DS, C, SHBG, PSA, TSH, fT3, fT4, & TPO)
  • Female Blood Profile I
    (E2, Pg, T, DS, C & SHBG)
  • Female Blood Profile II
    (E2, Pg, T, DS, C, SHBG, TSH, fT3, fT4, & TPO)
  • Complete Thyroid Profile
    (TSH, fT3, fT4, & TPO)
  • CardioMetabolic Profile I
    (Insulin, hsCRP, HbA1c, TG, CH, LDL, HDL, VLDL)

All of these blood spot profiles are available to Medicare patients when using the EZ MediCARE Kit.

- Blood Spot Reference Ranges

The following table compares which tests are done in saliva and/or blood spot.

Hormone or Analyte Saliva Blood Spot
Estradiol (E2) Checkmark Checkmark
Progesterone (Pg) Checkmark Checkmark
Testosterone, free Checkmark
Testosterone, total Checkmark
DHEA-S (DS) Checkmark Checkmark
Cortisol, AM (C1) Checkmark Checkmark
Cortisol, Diurnal (C1, C2, C3, C4) Checkmark
Estriol (E3) Checkmark
Estrone (E1) Checkmark
Follicle stimulating hormone (FSH) Checkmark
Luteinizing Hormone (LH) Checkmark
Insulin-like Growth Factor (IGF-1) Checkmark
Insulin, fasting Checkmark
Triglycerides (TG) Checkmark
Hemoglobin A1C (HbA1c) Checkmark
High Sensitivity C-Reactive Protein (hs-CRP) Checkmark
Total Cholesterol (CH) Checkmark
LDL Cholesterol Checkmark
HDL Cholesterol Checkmark
VLDL Cholesterol Checkmark
Prostate specific antigen (PSA) Checkmark
Sex hormone binding globulin (SHBG) Checkmark
Thyroid peroxidase antibodies (TPO) Checkmark
Thyroid stimulating hormone (TSH) Checkmark
Triiodothyronine (T3), free Checkmark
Thyroxine (T4), free Checkmark
25-hydroxy vitamin D2 Checkmark
25-hydroxy vitamin D3 Checkmark

The Science Behind DBS


Want more information? Download our Provider Data Sheet: About Blood Spot Testing (PDF)

How To Collect A Blood Spot
Collecting A Blood Spot
Watch a 3 minute video demonstrating the simplicity of dried blood spot (DBS) collection.