🩺

Medically reviewed by the Vital Signs Today Medical Review Board. Last updated 18 June 2026. Every range and figure below is drawn from the peer-reviewed and clinical sources listed at the end of this article.
Key takeaways

  • Most healthy adults need routine blood work about once a year, usually drawn during an annual wellness visit, even when they feel fine.
  • Healthy adults without heart disease should have a cholesterol (lipid) panel every 4 to 6 years starting at age 20, per the American College of Cardiology and American Heart Association.
  • Adults with no diabetes risk factors should be screened for diabetes starting at age 35 and, if results are normal, repeated at least every 3 years, per the American Diabetes Association.

There is no single calendar that fits everyone. How often you need blood work depends on your age, your existing conditions, your medications, and your personal risk. This guide breaks down the common tests, the evidence-based intervals behind them, and the situations that call for more frequent draws.

How often should a healthy adult get routine blood work?

Most healthy adults need a basic round of blood work about once a year, typically drawn at an annual wellness exam. There is no universal mandate for yearly testing in people with no symptoms or risk factors, but a yearly checkpoint lets a clinician track trends and catch silent changes early. A complete blood count (CBC) is often performed at least once a year and frequently each time you see your doctor (Forest Urgent Care).

The point of annual labs is not the single number. It is the trend line. A cholesterol or fasting glucose value that drifts upward year over year tells your clinician something a one-time snapshot cannot. If you are young, lean, and have no family history of chronic disease, your clinician may reasonably stretch the interval. If you are over 40 or carry risk factors, yearly testing becomes the practical default.

Want to check your results yourself?

Check your your results and 100+ other biomarkers from home with one Superpower panel, reviewed by a physician.

See what Superpower tests →

How often should you check cholesterol and a lipid panel?

Healthy adults without heart disease should have a lipid panel every 4 to 6 years starting at age 20, according to American College of Cardiology and American Heart Association guidance cited by Cleveland Clinic. That interval tightens with age and risk.

  • Ages 20 to 44, low risk: every 4 to 6 years is reasonable.
  • Middle age and higher risk: men 45 to 65 and women 55 to 65 are often screened every 1 to 2 years.
  • Over 65: annual screening is common.
  • On a statin or with known heart disease: more frequent testing to monitor response.

High cholesterol has no symptoms, so a normal-feeling person can carry a high LDL for years. That silent quality is exactly why a fixed interval matters. The numbers above are starting points, not rules. A strong family history of early heart attack or stroke is a common reason a clinician pulls the interval in.

How often should you test blood sugar and A1C?

Adults with no diabetes risk factors should begin diabetes screening at age 35, and if results are normal, repeat at least every 3 years, per the American Diabetes Association 2026 Standards of Care. Screening can use fasting glucose, an oral glucose tolerance test, or an A1C.

The interval shifts the moment risk appears. The ADA notes that screening should happen sooner, and more often, with symptoms or a change in risk such as weight gain. People with overweight or obesity plus an added risk factor are often screened earlier than 35.

If you already have diabetes, the A1C cadence is different. The ADA advises measuring A1C at least twice a year in patients who are stable and meeting goals, and at least 4 times a year when therapy has changed or glucose is not at target (American Diabetes Association). A1C reflects roughly the prior 3 months of average blood sugar, which is why a 3-month minimum spacing makes biological sense.

How often should you get a comprehensive metabolic panel?

A comprehensive metabolic panel (CMP) is commonly ordered during annual physicals and routine wellness exams, with yearly testing typical for adults over 40 (MedlinePlus). The CMP measures 14 substances, including glucose, kidney markers, liver enzymes, and electrolytes, giving a wide read on organ function in one draw.

Frequency rises with reasons to watch a specific organ. Clinicians may order a CMP or CBC every 3 to 6 months for people managing chronic conditions or taking medications that affect the liver or kidneys (Pharmacy Times). Common triggers for tighter monitoring include:

  • Kidney concern: tracking creatinine and eGFR over time.
  • Liver concern or new medication: watching liver enzymes after a drug is started.
  • Diuretics or other drugs: checking electrolytes such as sodium and potassium.

When do you need blood work more often than once a year?

You need more frequent blood work whenever a condition, medication, or new symptom requires active monitoring, and intervals of every 3 to 6 months are common in those settings (Pharmacy Times). The yearly default is for stable, low-risk adults. Several situations override it.

  • Chronic disease management: diabetes, kidney disease, thyroid disorders, and heart disease all warrant closer tracking.
  • New or adjusted medication: statins, thyroid hormone, blood thinners, and many others require follow-up labs to confirm dose and safety.
  • New symptoms: unexplained fatigue, weight change, easy bruising, or persistent infections can prompt a CBC or metabolic panel regardless of when you last tested.
  • Pregnancy: prenatal care includes its own schedule of blood tests.

The principle is simple. Routine screening is about catching silent change in a healthy body. Monitoring is about following a known problem closely enough to act on it. Your clinician decides which mode you are in, and the interval follows from that.

How should you decide your own testing schedule?

The right schedule is the one your clinician sets after weighing your age, history, medications, and risk factors, not a number from a chart online. The intervals in this article are evidence-based defaults that apply to broad groups. They are a starting point for a conversation, not a prescription.

Bring three things to that conversation. First, your family history, especially early heart disease, diabetes, or thyroid disease. Second, a current list of every medication and supplement you take. Third, any new symptoms, even vague ones. With those in hand, your clinician can tell you which tests you need and how often, and whether your low-risk yearly default should become a tighter monitoring schedule.

Frequently asked questions

Do I need to fast before routine blood work?

Some tests require fasting and others do not. A lipid panel and a fasting glucose test often require 8 to 12 hours without food or drink except water. A CBC and many other tests do not. Ask the ordering clinic for specific instructions before your draw.

Is yearly blood work necessary if I feel healthy?

Feeling healthy does not rule out silent conditions. High cholesterol and early diabetes often cause no symptoms for years. A yearly checkpoint at a wellness visit helps catch these trends early, though your clinician may adjust the interval based on your risk.

At what age should I start regular blood work?

Cholesterol screening can start at age 20 every 4 to 6 years for healthy adults, per the American College of Cardiology and American Heart Association. Diabetes screening for people with no risk factors begins at age 35, per the American Diabetes Association.

How often should I check my A1C if I have diabetes?

The American Diabetes Association advises an A1C at least twice a year if you are stable and meeting your goals, and at least 4 times a year if your treatment changed or your glucose is not at target. A1C reflects about the prior 3 months.

What is the difference between a CBC and a CMP?

A complete blood count (CBC) measures blood cells such as red cells, white cells, and platelets. A comprehensive metabolic panel (CMP) measures 14 substances including glucose, electrolytes, and kidney and liver markers. They answer different questions and are often ordered together.

Sources

This article is for general educational purposes and is not medical advice. It cannot diagnose or treat you and does not replace your clinician. Always discuss your lab results and any health decisions with a qualified healthcare professional.