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Find the answers basic labs never gave you
Find the answers basic labs never gave you
Stop guessing, start knowing
Stop guessing, start knowing
“Normal” labs often leave you without answers. Function goes deeper, testing 100+ biomarkers to give you a more detailed picture of your health, and actionable next steps. Because you deserve real solutions, not another quick fix.
ApoB helps transport lipids throughout the bloodstream which is vital to the health of cardiovascular function. Along with other lipid tests ApoB is a powerful risk marker for cardiovascular disease.
Measures the number of LDL particles, which are the carriers of cholesterol. Too many LDL particles can lead to plaque buildup in arteries, increasing the risk of heart disease and stroke.
Refers to the most common or average size of LDL particles in your blood. This is important because smaller LDL particles are more likely to contribute to plaque buildup in arteries, increasing the risk of cardiovascular disease.
Measures the ratio of total cholesterol levels to high-density lipoprotein cholesterol (HDL).
HbA1c is the average amount of glucose attached to blood cells over the last 90 days. It diagnoses, monitors, and screens for prediabetes and diabetes. This test is a revelatory look into one's health, specifically the body’s ability to control blood sugar. Unhealthy levels are triggered by inflammation, vitamin deficiencies, kidney damage, thyroid disorders, and more. One's diet and habits can have a substantial impact on this test.
Insulin levels can uncover reasons behind abnormal blood sugar, insulin resistance, and more. It can also reveal hidden blood sugar issues even years before they escalate to something like diabetes. Establishing one's insulin baseline can be incredibly insightful to how one's lifestyle affects health.
About 1 in 5 women and 1 in 10 men have hypothyroidism, and a TSH test can help reveal thyroid issues. Looking at abnormal TSH results alongside thyroid peroxidase (TPO) may be a sign of Graves’ disease. TSH is produced by the pituitary gland and controls the release of thyroid hormones: triiodothyronine (T3) and thyroxine (T4).
This test is typically cross-referenced with TSH and T3 to gain insight into overall thyroid function. Thyroxine, or T4, is produced in the thyroid then released into the bloodstream where it travels to the liver and kidneys. It is converted into the hormone triiodothyronine (T3). The synergy of T4 and T3 is important for heart and digestive function, metabolism, brain development, bone health, and muscle control.
T3 levels can reveal an overactive (hyperthyroidism) or underactive (hypothyroidism or Hashimoto’s) thyroid. T3 is the most powerful thyroid hormone in the body. It helps regulate body temperature, control heart rate, lower cholesterol, improve memory, promote regrowth after hair loss, soothe muscle aches, regulate bowel movements, and support fertility.
TPO antibodies target thyroid enzymes and are associated with autoimmune thyroid conditions such as Hashimoto's thyroiditis and Graves' disease.
Potassium levels can detect kidney disease, liver disease, heart failure, high blood pressure, or other disorders. As an electrolyte, potassium helps muscles contract, aids digestion, allows nerves to transport messages from the brain to the body, and balances fluids and regulates blood pressure.
The estimated glomerular filtration rate (eGFR) is a key measure of kidney function essential for identifying changes that may impact cardiovascular and metabolic health. Testing supports early intervention in kidney-related issues.
Albumin is the most abundant protein in the blood and plays a vital role in maintaining fluid balance and transporting nutrients. Healthy albumin levels are critical for supporting bone health, as they influence calcium transport and overall bone metabolism.
A lipase test is able to show swelling or inflammation in the pancreas, a condition known as pancreatitis. It can also reveal other health conditions such as kidney disease, pancreatic cancer, and problems with the gallbladder or esophagus. Lipase is an enzyme produced by the pancreas that helps the body digest fats.
In partnership with Grail, the Galleri® multi-cancer early detection test detects cancer signals across 50+ types of cancer as early as stage one. Test annually and stay vigilant for early warning signs. *This add-on test is available for an additional cost and is not included in the $499 membership.
Types of cancer tested: Adrenal Cortical Carcinoma, Ampulla of Vater, Anus, Appendix, Carcinoma, Bile Ducts, Bladder, Urinary, Bone, Breast, Cervix, Colon and Rectum, Esophagus and Esophagogastric Junction, Gallbladder, Gastrointestinal Stromal Tumor, Gestational Trophoblastic Neoplasms, Kidney, Larynx, Leukemia, Liver, Lung, Lymphoma (Hodgkin and Non-Hodgkin), Melanoma of the Skin, Merkel Cell Carcinoma, Mesothelioma, Nasal Cavity and Paranasal Sinuses, Nasopharynx, Neuroendocrine Tumors, Oral Cavity, Oropharynx, Ovary, Fallopian Tube and Primary Peritoneum, Pancreas, Penis, Plasma Cell Myeloma and Plasma Cell Disorders, Prostate, Small Intestine, Soft Tissue Sarcoma, Stomach, Testis, Ureter, Renal Pelvis, Uterus, Vagina, and Vulva.
This percentage helps determine the risk of prostate cancer and is often referred to if a doctor is deciding whether or not to conduct a biopsy. The percentage is calculated by dividing free PSA by total PSA and multiplying it by 100%.
Rheumatoid factors (RFs) are antibodies produced by the immune system. The presence of RFs can indicate autoimmune disorders such as rheumatoid arthritis, rheumatoid vasculitis, or Sjögren’s syndrome. Asymptomatic individuals with elevated RF levels may have pre-autoimmunity.
The Antinuclear Antibodies (ANA) Screen is a blood test that detects the presence of antibodies that mistakenly target and attack the nucleus of the body's cells. A positive ANA test suggests an autoimmune response, but further tests are usually required to determine the specific condition and guide appropriate treatment.
hs-CRP is revelatory in one's overall health as it relates to the risk of inflammation-related diseases. Chronic inflammation is linked to every major disease: heart disease (even before symptoms occur), type 2 diabetes, cancer, high blood pressure, Alzheimer’s, depression, all autoimmune diseases, and severe allergic reactions like asthma.
Vitamin B12 is integral for nerve function, DNA synthesis, and red blood cell formation. Testing helps identify deficiencies linked to fatigue, neurological symptoms, and anemia.
Folate (vitamin B9) is essential for DNA synthesis, red blood cell production, and preventing neural tube birth defects. Testing helps identify deficiencies that may impact energy, mood, or cardiovascular health.
For biological females, testing the hormone estradiol (one type of estrogen) is key in detecting menopause, polycystic ovarian syndrome (PCOS), androgen- or estrogen-producing tumors, uterine and breast cancer, and mitigating the risk of osteoporosis and cardiovascular disease. If one is on hormonal birth control, this test will not be run.
This helps evaluate functions associated with testosterone levels, such as fertility, sexual function, muscle mass, energy, mood, insulin resistance/sensitivity, and pituitary function. It can also screen for prediabetes. Function tests both "free" and “total” testosterone in the blood.
ALT is an enzyme that checks on liver health. If one's liver cells are damaged due to excess alcohol, drugs, disease, or injury, ALT will appear in the bloodstream and, therefore, in a blood test.
Your membership
Your membership
What could cost you $15,000 is $499
What could cost you $15,000 is $499
Testing is easy
Testing is easy



Take charge of your health starting with knowledge
Take charge of your health starting with knowledge
What does a Function membership include?
For $499 per year, a Function membership gives you:
- 100+ lab tests at the start of each year—no hidden costs, no insurance required.
- 60+ follow-up tests at 3–6 months to track changes.
- Insights from top doctors based on your results.
- A written clinician summary to help you understand your data.
- Access to re-test at transparent prices when needed.
- Option to purchase additional tests, including Lyme, STDs, and allergies.
- Access to groundbreaking tests, like the Galleri Multi-Cancer Early Detection test.
Function is for anyone 18 and older. The sooner you establish a baseline, the better—you’ll see where you stand today and track changes over time. Understanding your body’s trends gives you the power to make informed decisions about your future.
Function takes privacy extremely seriously. We use a range of the latest technical security tools and administrative measures to safeguard your data against unauthorized access or disclosure. Note that Function cannot secure personal data that you release on your own or that you request us to release, so we recommend carefully considering with whom you choose to share this data. Read our Privacy Statement.
Function is 100% insurance-free. No deductibles. No co-pays. No surprise bills. We are committed to transparent prices and you knowing exactly what you pay for. Function does not accept insurance; however, it may be FSA/HSA eligible. You should check with your plan administrator to confirm eligibility. Function provides you with a receipt to assist you with submitting to an FSA/HSA plan.