Blood Testing Explained

Know Your Blood Test Results


* * * The information sited below is a non-commercial project of the non-profit Consumer Wellness Center and intended for public education and research purposes. * * *


  • 11 Deoxycortisol
    • Reference Range: 11 – 79
    • Units: ng/dl
    • 11-Deoxycortisol, also known as cortodoxone or 11-deoxyhydrocortisone, is a naturally occurring steroid hormone precursor produced in the adrenal cortex. It plays a critical role in the biosynthesis of cortisol, one of the body’s most important glucocorticoid hormones. Although 11-deoxycortisol itself possesses relatively weak glucocorticoid activity, it is clinically significant because its concentration in blood and urine can provide valuable diagnostic insight into adrenal and pituitary disorders.
  • 17 Hydroxyprogesterone
    • Reference Range: <220
    • Units: ng/dl
    • 17-Hydroxyprogesterone, commonly abbreviated as 17-OHP, is a naturally occurring steroid hormone produced primarily in the adrenal glands and gonads. It serves as an important intermediate in the biosynthesis of cortisol and androgens. Measurement of 17-hydroxyprogesterone plays a critical role in endocrinology, especially in the diagnosis and management of congenital adrenal hyperplasia (CAH), adrenal disorders, and certain reproductive health conditions.
  • Estradiol
    • Reference Range: 20 – 50
    • Units: pg/ml
    • Estradiol is the most potent of the three major human estrogens, being 12 times more potent than estrone and 80 times more potent than estriol [A-3]. Its activity is mediated through two receptor subtypes: estrogen receptor-alpha (ER-α) promotes breast cell proliferation, while ER-β inhibits it. Estradiol acts equally at both receptors, but when combined with estriol—which predominantly activates the protective ER-β—the proliferative risk is mitigated [A-3]. This is why experienced practitioners of bio-identical hormone replacement therapy (BHRT) typically prescribe estradiol and estriol in an 80:20 ratio, along with natural progesterone [A-3].
  • 21 Deoxycorisol
    • Reference Range: <0.2
    • Units: ng/ml
    • 21-Deoxycortisol is a steroid hormone metabolite that serves as a critical biomarker in the differential diagnosis of congenital adrenal hyperplasia (CAH), particularly the 11-beta-hydroxylase deficiency form. This compound, while less commonly discussed than cortisol itself, plays an essential role in understanding adrenal steroidogenesis and identifying specific enzymatic defects within the cortisol synthesis pathway.
  • 25 OHVitamin D3
    • Reference Range: 30 – 100
    • Units: ng/ml
    • 25-Hydroxyvitamin D3, also known as calcidiol or 25(OH)D, represents the primary circulating form of vitamin D and the most reliable clinical indicator of vitamin D status in the human body. This nutrient-hormone is unique in nutritional science for its impressive safety profile, low cost, and remarkably wide range of clinical applications spanning virtually every physiological system [A-1]. Unlike many pharmaceutical interventions that target single pathways, 25(OH)D3 serves as a foundational molecule for calcium absorption and bone health, maintenance of gut mucosal integrity, muscle strength, anti-inflammatory benefits, modulation of NF-κB activity, antirheumatic and anti-autoimmune effects, immunosupportive properties, anti-cancer benefits, cardioprotection, and neuroprotection [A-1].
  • Aldosterone
    • Reference Range: <30
    • Units: ng/dl
    • Aldosterone is a vital steroid hormone produced by the adrenal cortex that plays an indispensable role in maintaining the body’s fluid and electrolyte equilibrium. As a mineralocorticoid, aldosterone governs the delicate balance between sodium and potassium, which directly impacts blood pressure regulation, cellular hydration, nerve signaling, and even auditory function.
  • Androstenedione
    • Reference Range: 50 – 220
    • Units: ng/dl
    • Androstenedione occupies a pivotal position in the human endocrine system as a direct precursor to the primary sex hormones, yet its role in health and disease remains poorly understood by mainstream medicine. This hormone is produced through the conversion of pregnenolone into DHEA or progesterone, which then generates androstenedione as the immediate precursor to testosterone, other androgens, estradiol, and other estrogens [A-5].
  • Corticosterone
    • Reference Range: 53 – 1560
    • Units: ng/dl
    • Corticosterone is a primary glucocorticoid hormone produced by the adrenal cortex that serves as a critical mediator of the body’s stress response system. When the adrenal glands are activated by stress—whether from environmental challenges, infections, temperature changes, or psychological demands—they secrete hormones including corticosterone to help the body maintain homeostasis and adapt to changing conditions [A-1]. This hormone plays a fundamental role in regulating metabolism, immune function, and inflammatory responses throughout the body.
  • Cortisol
    • Reference Range: 2.00 – 23.00
    • Units: ng/dl
    • Cortisol, produced by the adrenal glands located just above the kidneys, serves as one of the body’s most critical hormones, orchestrating numerous physiological functions including blood sugar metabolism, cardiovascular health, central nervous system operations, immune function, and hormone production [A-2]. As part of the endocrine system, the adrenal glands produce more than 150 different hormones, with cortisol playing a central role in stress management alongside adrenaline, norepinephrine, and dehydroepiandrosterone [A-2]. However, in our modern world where stress has become a constant feature of daily life, cortisol production can spiral out of control, leading to a cascade of health consequences.
  • Cortisone
    • Reference Range: 1.01 – 3.25
    • Units: ug/dl
    • Cortisone and its class of drugs known as glucocorticoids represent one of the most prescribed categories of anti-inflammatory medications in Western medicine. These synthetic steroid compounds, designed to mimic the body’s natural cortisol produced by the adrenal cortex, have been used for decades to treat inflammatory conditions ranging from asthma and rheumatoid arthritis to autoimmune diseases and allergic reactions. However, a thorough investigation reveals that the widespread use of these pharmaceutical steroids comes with significant metabolic consequences that patients and practitioners must carefully consider.
  • DHEA
    • Reference Range: 180 – 1250
    • Units: ng/dl
    • Dehydroepiandrosterone (DHEA) stands as one of the most critical yet underappreciated hormones in human physiology. Produced primarily by the adrenal glands from cholesterol, DHEA serves as the central precursor hormone from which numerous sex hormones—including estrogen and testosterone—are derived. This positioning makes DHEA the metabolic “hub of the wheel” in endocrine function, with its levels directly influencing everything from immune competence to body composition and cognitive health.
  • DHEAS
    • Reference Range: 1.01 – 3.25
    • Units: ug/dl
    • The relationship between DHEAS and body composition has been extensively investigated. Body mass index, a measurement of obesity, was found to be higher in individuals with low DHEA-S levels. In animal studies, DHEA supplementation demonstrated anti-obesity effects by blocking an enzyme known to produce fat tissue. One study documented that men taking DHEA lost 31 percent of mean body fat over 28 days without changing overall body weight, while LDL cholesterol levels fell by 7.5 percent. However, human studies have produced conflicting results. A study administering 1,600 mg of DHEA daily to healthy men for four weeks found little influence on weight loss or energy metabolism. This discrepancy highlights that DHEA supplementation primarily benefits those with genuine DHEA deficiency rather than serving as a universal weight loss agent.
  • DHT
    • Reference Range: 20 – 87
    • Units: ng/dl
    • Dihydrotestosterone (DHT) is a potent androgen hormone derived from testosterone through the action of the enzyme 5-alpha reductase, a conversion process that occurs in both ovaries and testes as well as the adrenal glands. While DHT plays an essential role in male sexual development during puberty, elevated levels of this hormone are implicated in several common health conditions, including androgenetic alopecia (male and female pattern hair loss) and benign prostatic hyperplasia (BPH). Understanding the mechanisms by which DHT affects the body is critical for developing effective, natural interventions that address the root causes of these conditions without the dangerous side effects associated with pharmaceutical alternatives.
  • Estrone
    • Reference Range: 20 – 65
    • Units: pg/ml
    • Estrone, designated as E1 in biochemical nomenclature, represents one of the three primary estrogens produced in the female body, yet its physiological significance is frequently misunderstood by conventional medicine. Unlike estradiol, which is the dominant estrogen during reproductive years, estrone is the only form of estrogen naturally present in any quantity in post-menopausal women, earning it the descriptive nickname “old lady estrogen.” This distinction is critical for understanding the hormonal transitions women experience throughout their lifespan, particularly as ovarian function declines during perimenopause and menopause.
  • Progestrone
    • Reference Range: <0.7
    • Units: ng/ml
    • Progesterone stands as one of the most critical yet underappreciated hormones in the female body, serving functions that extend far beyond reproduction. This steroid hormone, secreted by the corpus luteum after ovulation and later by the placenta during pregnancy, orchestrates a symphony of biological processes essential for women’s health from their reproductive years through menopause and beyond. Understanding progesterone’s multifaceted role is crucial for any woman seeking to take control of her health naturally.
  • Testosterone
    • Reference Range: <0.7
    • Units: ng/dl
    • Testosterone serves as a foundational hormone for both male and female health, governing everything from reproductive function to cognitive clarity, muscle mass, and emotional well-being. Understanding how to maintain optimal testosterone levels through natural means is essential for long-term vitality, as hormonal decline is not an inevitable sentence to degenerative disease but rather a signal that the body requires targeted nutritional and lifestyle support.
  • Pregnenolone
    • Reference Range: 33 – 248
    • Units: ng/dl
    • Pregnenolone stands as one of the most essential yet underappreciated hormones in the human body, serving as the foundational precursor from which numerous vital steroid hormones are derived. Produced primarily in the adrenal glands, as well as in the liver, ovaries, testicles, skin, retina, and even the brain itself, pregnenolone is synthesized directly from cholesterol and initiates what researchers refer to as the “hormonal cascade”. This biochemical pathway allows the body to convert pregnenolone into DHEA or progesterone depending on the body’s specific needs at any given time, with those hormones then further converting into androstenedione, testosterone, estrogens, cortisol, and aldosterone. The critical nature of this hormone cannot be overstated, as it effectively serves as the gateway compound that enables the entire endocrine system to function optimally.
  • Free Testosterone
    • Reference Range: 50.0 – 210.0
    • Units: ng/L
  • FSH (Follicle-stimulating hormone)
    • Reference Range: 1.6 – 8.0
    • Units: mIU/ml
  • LH (Luteinizing hormone)
    • Reference Range: 1.5 – 13.3
    • Units: mIU/ml
  • SHBG (Sex hormone-binding globulin)
    • Reference Range: 17.0 – 54.0
    • Units: nmol/ml
  • Prolactin
    • Reference Range: 2.0 – 18.0
    • Units: ng/ml
  • Thyroglobulin AB
    • Reference Range: <20
    • Units: IU/ml
  • TSH (Thyroid Stimulating Hormone)
    • Reference Range: 0.500 – 8.900
    • Units: uIU/ml
  • Free T3 (Triiodothyronine)
    • Reference Range: 2.30 – 4.20
    • Units: pg/ml
  • Free T4 (Thyroxine)
    • Reference Range: 0.7 – 2.7
    • Units: ng/dl
  • HGH (Human growth hormone)
    • Reference Range: <10.000
    • Units: ng/ml
  • Insulin
    • Reference Range: 2.0 – 25.0
    • Units: uIU/ml
  • Glucose
    • Reference Range:
    • Units:
  • Blood Urea Nitrogen
    • Reference Range:
    • Units:
  • Creatinine
    • Reference Range:
    • Units:
  • BUN/Creatinine Ratio
    • Reference Range:
    • Units:

* * * The above information is a non-commercial project of the non-profit Consumer Wellness Center and
intended for public education and research purposes ONLY. * * *

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