How Often Should You Get Blood Work? An Age-by-Age Guide
There's no single answer, but there are clear age-and-risk-based guidelines. Here's what most healthy adults should do — and when to test more often.
In your 20s and 30s
If you feel well and have no risk factors, a full baseline every 2–3 years is enough. That baseline is important — future results are always compared against your own trend, not just the reference range.
Test earlier and more often if you have a family history of diabetes, thyroid disease, high cholesterol, or autoimmune conditions; if you're on hormonal contraception; if you're vegan or vegetarian (B12, iron); or if you have symptoms like persistent fatigue, hair loss, or menstrual irregularities.
In your 40s
An annual check-up with blood work becomes the reasonable default. Cardiovascular risk, prediabetes, thyroid drift and — for women — perimenopausal changes all start being clinically detectable in this decade.
Adding a lipid panel, HbA1c, TSH, ferritin, vitamin D and B12 to your CBC and metabolic panel each year gives a strong picture. For women in their mid-to-late 40s, an occasional FSH/estradiol snapshot can help contextualise symptoms.
In your 50s and beyond
Annual blood work should be paired with age-appropriate cancer screening (colonoscopy, mammography, cervical screening, PSA discussion for men). Add uric acid if you have joint symptoms, and consider an ApoB or Lp(a) in patients with cardiovascular family history to sharpen risk estimation.
Patients on chronic medications — statins, blood pressure, thyroid, hormone therapy — often need repeat blood work every 3–6 months for the first year on a new dose, then annually once stable.
Frequently asked questions
Is once a year overkill for a healthy 30-year-old?+
Yes, usually. Every 2–3 years is enough unless you have symptoms or specific risk factors. What matters is having at least one solid baseline before your 30s end.