Low T and Testosterone Replacement Therapy (TRT)

The Growth Hormone Test measures GH levels in blood to evaluate pituitary gland function, growth disorders, and metabolic health. Abnormal levels may indicate acromegaly, gigantism, or growth hormone deficiency. Doctors use this test to assess children with short stature, adults with suspected hormone imbalance, or patients with pituitary tumors. Results provide critical insight into endocrine function, metabolism, and overall growth regulation.

The Hemoglobin A1c (HbA1c) Test measures average blood glucose over 2–3 months by detecting sugar attached to hemoglobin in red blood cells. It is used to diagnose diabetes, identify prediabetes, and monitor long-term blood sugar control. Doctors rely on the HbA1c test to evaluate treatment effectiveness, guide adjustments, and assess risk for complications, making it essential for diabetes care and metabolic health screening.

The Homocysteine Test measures homocysteine levels in blood to assess risk for heart disease, stroke, and vascular problems. Elevated homocysteine may result from vitamin B6, B12, or folate deficiency and is linked to blood clots, cognitive decline, and osteoporosis. Doctors use this test to evaluate cardiovascular risk, monitor nutritional deficiencies, and guide treatment for metabolic or genetic conditions affecting homocysteine metabolism.

The IGF Binding Protein 3 (IGFBP-3) Test measures IGFBP-3, the primary carrier of insulin-like growth factor 1 (IGF-1), to evaluate growth hormone activity. Abnormal levels may indicate growth disorders, pituitary dysfunction, or nutritional problems. Doctors use this test with IGF-1 to assess short stature, delayed or rapid growth, and monitor therapy for growth hormone deficiency or excess, supporting accurate diagnosis and treatment.

The IGF-1 Test measures insulin-like growth factor 1, a hormone regulated by growth hormone (GH), to assess growth and endocrine function. Abnormal levels may indicate growth disorders, acromegaly, gigantism, or GH deficiency. Doctors order this test to evaluate delayed growth, short stature, excessive growth, or pituitary disease and to monitor GH therapy. Results provide valuable insight into hormone balance, metabolism, and overall endocrine health.

The LH Test measures luteinizing hormone levels in blood to assess fertility, reproductive health, and endocrine function. Abnormal LH may indicate infertility, menstrual irregularities, menopause, or pituitary disorders in women, and low testosterone or testicular dysfunction in men. Doctors use this test to evaluate ovulation, investigate infertility, monitor puberty disorders, or guide hormone therapy. It provides key insight into reproductive and hormonal balance.

The Lipid Panel Test checks six key blood lipids: total cholesterol, HDL cholesterol, LDL cholesterol, non-HDL cholesterol, triglycerides, and the Chol/HDL ratio. This panel assesses risk for cardiovascular disease, heart attack, and stroke by evaluating cholesterol balance and fat levels in the blood. Doctors use lipid panel results for routine screening, treatment monitoring, and guiding lifestyle or medication adjustments.

The Lipid Panel with Ratios Test measures seven key markers: total cholesterol, HDL, LDL, non-HDL cholesterol, triglycerides, Chol/HDL ratio, and LDL/HDL ratio. This advanced panel evaluates cardiovascular risk by assessing cholesterol balance and fat metabolism. Doctors use it to detect high cholesterol, atherosclerosis risk, and heart disease, and to monitor treatment. Often part of routine exams, it provides insight into long-term heart and metabolic health.

The Progesterone Test measures progesterone levels in blood to evaluate ovulation, fertility, and menstrual health. It helps confirm whether ovulation has occurred, assess causes of infertility, and monitor hormone therapy or high-risk pregnancies. Doctors also use it to investigate abnormal bleeding, detect ovarian or adrenal disorders, and evaluate miscarriage risk. This test provides key insight into reproductive, hormonal, and overall endocrine health.

The Prolactin Test measures prolactin, a hormone produced by the pituitary gland, to assess reproductive and endocrine health. High prolactin (hyperprolactinemia) may cause infertility, irregular periods, or milk production in women and low testosterone, erectile dysfunction, or infertility in men. Doctors use this test to evaluate pituitary tumors, hormonal imbalance, or unexplained symptoms such as headaches, vision changes, or abnormal lactation.

The PSA Total Test measures prostate-specific antigen levels in blood to evaluate prostate health. Elevated PSA may indicate prostate cancer, benign prostatic hyperplasia (BPH), or prostatitis. Doctors use this test for early detection of prostate cancer, monitoring treatment, or assessing recurrence risk. Commonly recommended for men over 50 or those at higher risk, the PSA test supports diagnosis, prevention, and long-term prostate care.

The PSA Free and Total Test measures prostate-specific antigen in blood, reporting both free and total PSA to help evaluate prostate health. It is used to screen for prostate cancer, differentiate between cancer and benign conditions like prostatitis or enlarged prostate (BPH), and monitor treatment. Doctors order this test for men with urinary symptoms or at risk of prostate disease. Results provide key insight into prostate function and overall men’s health.

The Sex Hormone Binding Globulin (SHBG) Test measures SHBG, a protein that binds testosterone and estrogen, to assess how much active hormone is available in the body. Abnormal levels may indicate PCOS, infertility, low testosterone, liver disease, or thyroid disorders. Doctors order this test to investigate symptoms like low libido, irregular periods, acne, or hair loss and to evaluate hormone balance, endocrine function, and metabolic health in men and women.

The T3 Reverse (rT3) Test measures reverse triiodothyronine, an inactive thyroid hormone, to assess thyroid and metabolic function. High rT3 may occur in hypothyroidism, chronic illness, stress, or during certain treatments, while low levels may reflect hormone imbalance. Doctors use this test along with TSH, Free T4, and Free T3 to evaluate fatigue, weight changes, or slow metabolism. The rT3 Test provides insight into thyroid regulation, energy balance, and endocrine health.

The T3 Free Test measures free triiodothyronine (T3), the active thyroid hormone not bound to proteins, to assess thyroid function. It helps diagnose hyperthyroidism, hypothyroidism, goiter, and pituitary disorders. Doctors order this test to evaluate symptoms like fatigue, weight changes, anxiety, or irregular heartbeat and to monitor thyroid replacement or antithyroid therapy. The Free T3 Test provides key insight into metabolism, energy regulation, and overall endocrine health.

The T4 Free Test measures the level of free thyroxine (T4) in blood, the active thyroid hormone not bound to proteins. It helps diagnose thyroid disorders such as hypothyroidism, hyperthyroidism, and goiter, as well as pituitary conditions affecting hormone regulation. Doctors use this test to evaluate symptoms like fatigue, weight changes, hair loss, or irregular heartbeat and to monitor thyroid replacement or antithyroid therapy, providing insight into metabolic and endocrine health.

The Thyroid Peroxidase and Thyroglobulin Antibodies Test measures TPO and TgAb antibodies that target thyroid enzymes and proteins essential for hormone production. High levels are linked to autoimmune thyroid disorders such as Hashimoto’s thyroiditis and Graves’ disease. Doctors order this test to evaluate fatigue, weight changes, neck swelling, or irregular heartbeat and to confirm thyroid autoimmunity. It provides vital insight into thyroid function and endocrine health.

The Thyroid Stimulating Hormone (TSH) Test measures TSH levels in blood to assess thyroid function and diagnose hypothyroidism or hyperthyroidism. It evaluates how the thyroid controls metabolism, energy, weight, and heart rate. Doctors use the TSH test to investigate symptoms such as fatigue, hair loss, or mood changes. Frequently included in routine health exams, it is also key for monitoring thyroid disease treatment and overall endocrine balance.

The Vitamin D 25-Hydroxy Total Test measures levels of 25-hydroxyvitamin D in blood to evaluate vitamin D status, bone health, and calcium balance. It helps detect deficiency, insufficiency, or toxicity, which can affect immune function, muscle strength, and risk of osteoporosis. Doctors use this test to assess overall nutritional health, monitor supplementation, and support diagnosis of metabolic or endocrine disorders linked to vitamin D.

The QuestAssureD™ Vitamin D 25-Hydroxy Total Test measures Vitamin D2, Vitamin D3, and total 25-hydroxy vitamin D to assess overall vitamin D status. Adequate vitamin D supports bone strength, calcium absorption, immune health, and muscle function. Low levels may cause osteoporosis, weakness, or increased disease risk, while high levels can indicate toxicity. Doctors use this test to diagnose deficiency, monitor supplementation, and evaluate metabolic and endocrine health.