Verbatim response from ChatGPT
Good question — a “full picture” varies by age, sex, medications and family history, but these are the core blood tests many clinicians use for an annual baseline. I list each test, why it’s useful, typical frequency, and any fasting requirement.
Core annual blood tests
- CBC (complete blood count) — checks for anemia, infection, platelet problems. Frequency: yearly (or sooner if symptomatic). Fasting: not required.
- CMP (comprehensive metabolic panel) or BMP (basic metabolic panel) — measures kidney function (creatinine, eGFR), electrolytes, liver enzymes (AST/ALT), and glucose. Frequency: yearly. Fasting: helpful if you’re also getting fasting glucose/lipids.
- Lipid panel (total cholesterol, LDL, HDL, triglycerides) — cardiovascular risk assessment. Frequency: yearly if you have risk factors; every 4–5 years if low risk. Fasting: many labs accept nonfasting but fasting is still used for triglycerides/accurate LDL.
- HbA1c (glycated hemoglobin) — diabetes screening/monitoring. Frequency: yearly if age ≥45 or with diabetes risk factors; more often if diabetic. Fasting: not required.
- TSH (thyroid-stimulating hormone) ± free T4 — screens for hypothyroidism or hyperthyroidism. Frequency: yearly or every 1–2 years (more often if symptoms or thyroid disease). Fasting: not required.
- 25-hydroxy Vitamin D — bone health, immune function; deficiency is common. Frequency: yearly if you’re supplementing, deficient, or at risk. Fasting: not required.
- Vitamin B12 (± folate) — low levels cause fatigue, neuropathy, cognitive symptoms; check if older, on metformin or PPIs, or symptomatic. Frequency: annually if at risk. Fasting: not required.
- Ferritin ± iron studies (iron, TIBC) — screens for iron deficiency or overload. Frequency: annually if menstruating, symptomatic, or at risk; otherwise as clinically indicated. Fasting: not required.
- hs-CRP (high-sensitivity C‑reactive protein) — marker of systemic inflammation and cardiovascular risk adjunct. Frequency: once yearly if assessing CV risk. Fasting: not required.
- Hepatitis C screen (anti-HCV) — CDC recommends at least once for most adults (and more often with risk factors). Frequency: once for most adults; repeat if risk. Fasting: not required.
Tests to consider based on age/sex/family history
- Lp(a) — single lifetime test if personal/family early heart disease or unexplained high risk. Not usually repeated annually.
- ApoB or NMR LipoProfile (LDL particle number) — helpful if discordant lipid results or high cardiovascular risk.
- PSA (prostate-specific antigen) — men: start shared decision-making at ~50 (earlier 45 or 40 if high risk/family history); frequency per shared decision-making with clinician.
- Reproductive/hormone tests — e.g., FSH/estradiol around menopausal transition in women, testosterone in men if symptomatic.
- Hepatitis B surface antigen/antibody — based on vaccination and risk.
- STD screens (HIV, syphilis, others) — per risk/behavior.
- Medication-related monitoring — e.g., INR for warfarin, liver tests for certain drugs, blood glucose more frequently if on steroids.
Practical notes
- Talk with your primary care clinician to tailor the list to your age, sex, family history, chronic conditions and medications — not everyone needs every test every year.
- Fasting: if you plan lipids and glucose the same day, fast 8–12 hours; otherwise many tests do not require fasting.
- Abnormal results often need repeat testing or interpretation in the clinical context; don’t rely on numbers alone.
Where to get tests (service recommendations)
- Quest Diagnostics and LabCorp — large national clinical labs accepted by most doctors and insurers; wide test menus including specialty tests (NMR LipoProfile, Lp(a)).
- Your primary care clinic or hospital lab — convenient when done at the time of a physical and allows your clinician to order and interpret results.
- Everlywell or LetsGetChecked — consumer-friendly at-home collection kits for common tests (lipids, A1c, vitamin D, thyroid). Good for convenience but limited menu and sometimes less integration with your doctor.
- Walk-In Lab / DirectLabs — let you order many individual tests directly (useful if you want a specific panel without a visit); check local regulations and insurance coverage.
If you want, tell me your age, sex, major medical history, medications and family history (heart disease, diabetes, thyroid disease, cancer), and I’ll give a tailored annual test list and note which tests you should prioritize.