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ZRT Total T4 Blood Spot Test

Thyroxine (T4) is the main hormone produced by the thyroid. A Total T4 test measures the overall level of T4 output by the thyroid gland. 

ZRT Free T4 Blood Spot Test

Free T4 affects tissue function in the body, while bound T4 does not. This test is often used in congunction with TSH testing to measure the extent of hyper- or hypothyroidism. 

ZRT Vitamin D Sunshine Profile

ZRT Vitamin D Sunshine Profile includes (in blood spot):

25-OH D2, 25-OH D3, Total Vitamin D (Calcifediol, also known as calcidiol, 25-hydroxycholecalciferol, or 25-hydroxyvitamin D3)

Vitamin D deficiency can lead to hypertension, joint pain, muscle weakness, and even heart disease and stroke. This test measures both the biologically active (D3) and supplemented (D2) forms.

ZRT TSH Blood Spot Test

TSH helps regulate the thyroid gland. It is produced by the pituitary gland in response to thyroid hormone levels in the bloodstream. A high level of TSH means not enough thyroid hormone production, and low TSH indicates too much thyroid activity.

ZRT Follicle Stimulating Hormone (FSH)

This pituitary hormone affects ovulation, sperm count, PCOS, irregular/absent menstrual periods and infertility. It is a strong indicator for menopause in women and andropause in men.

ZRT Luteinizing Hormone (LH)

Luteinizing Hormone (LH) is a marker for menopause onset in women, and is also useful for monitoring androgen therapy progress in men.

ZRT PSA Prostate-Specific Antigen Test

Prostate-specific antigen (PSA), is a protein produced by the male prostate gland. It is an important indicator of prostate health.

This single test is taken from a blood spot sample. 

ZRT High Sensitivity C-Reactive Protein (hs-CRP)

An established marker of inflammation, hs-CRP can be a major indicator of cardiovascular disease, especially if it is present in arterial walls. High levels are associated with increased risk of type 2 diabetes, heart disease, heart attack and stroke.