Blood Spot is the future of blood testing. The process requires only blood from a nearly painless finger prick and several tests can be run from a single sample. Blood Spot testing provides results on par with those from serum tests but without the cost and inconvenience of conventional blood drawing. And because hormone samples can be conveniently collected at home, collection times can be optimized for fasting baseline hormone levels, assessment of HRT dosing, and diurnal hormone testing.

ZRT Laboratory offers Blood Spot testing for measuring hormones and other substances in capillary blood.

Tests Offered in Blood Spot

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 in Blood Spot

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)

- Blood Spot Reference Ranges

Compare Saliva and Blood Spot

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

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