Lab Tests by Decade

Jadyn McRitchie | June 30, 2026

Your lab testing needs change every decade. The right tests in your 20s build a healthy baseline. Tests in your 50s catch shifts before they become diagnoses. Here is a decade-by-decade breakdown of what to test, how often, and why. 

Why Lab Tests Change by Decade 

Risk profiles shift with age. The U.S. Preventive Services Task Force, the CDC, and the American Heart Association anchor screening recommendations to age brackets, with diabetes screening starting at 35, colorectal screening at 45, and cholesterol testing as early as 17 with retests every 4 to 6 years. Hormone shifts, cardiovascular markers, and metabolic changes appear in different windows for women and men, and the numbers tell the story: 

  • 37 million U.S. adults have diabetes, and 1 in 5 don’t know it (CDC) 
  • 38% of U.S. adults have high LDL cholesterol (CDC) 
  • 1 in 2 men and 1 in 3 women will develop cardiovascular disease in their lifetime (American Heart Association) 
  • Vitamin D deficiency affects about 42% of U.S. adults (NIH) 
  • USPSTF lowered diabetes screening from age 40 to age 35 in 2021 

Those baseline rates are why the same person needs different tests at 25, 45, and 65. The right test at the right age catches what’s drifting before it becomes something else, and that turns lab work from a once-a-year chore into a decade-by-decade map. 

Your 20s: Build the Baseline 

Establishing a baseline is the entire goal of lab work in your 20s. The right tests now pin down what’s normal for you while you feel well, so future tests have context. Catching fixable issues early, like anemia, thyroid imbalance, and vitamin deficiencies, protects energy, mood, and fertility planning down the road, and the recommended tests in your 20s include: 

  • Annual baseline labs (CBC, comprehensive metabolic panel), see Annual Check-Up Panel 
  • STD screening (CDC: annual for sexually active adults under 25), see Comprehensive STD Panel 
  • HIV, with the CDC recommending at least once for everyone aged 13 to 64 and more often based on risk 
  • Cholesterol baseline every 5 years if normal, see Cholesterol (Lipid) Panel 
  • Vitamin D and B12 if fatigue, low energy, or limited sun exposure 
  • Thyroid baseline (TSH), see Comprehensive Thyroid Panel 
  • Iron and ferritin for women with heavy periods or vegetarian and vegan diets 

The data points to why this decade matters more than most people assume: 

  • 20% of sexually active people aged 14 to 49 have an STI at any given time (CDC) 
  • 50% of all new STIs in the U.S. occur in adults under age 25 (CDC) 
  • 24% of women aged 20 to 49 are iron deficient (NIH) 
  • Only 30% of adults under 30 have ever had a baseline cholesterol test (CDC NHANES) 
  • Most of the 20s baseline runs in standard bundled panels and is accessible without a doctor’s referral. Establishing this baseline is the cheapest information your future self will ever buy, so start with the Annual Check-Up Panel and add the targeted tests above based on lifestyle and family history. 

Your 30s: Watch the Trendlines 

By your 30s, lab work shifts from snapshots to trendlines. Diabetes screening kicks in at 35 per USPSTF. Hormones matter more, with fertility planning and perimenopause precursors for women, and testosterone trendlines for men. STD screening continues with new partnerships or higher-risk windows, and the recommended tests in your 30s include: 

What the data says about the decade: 

  • USPSTF moved diabetes screening down to age 35 in 2021 (was 40) 
  • 1 in 8 women aged 18 to 44 have impaired fertility (CDC) 
  • Testosterone declines about 1% per year after age 30 (American Urological Association) 
  • About 40% of cardiovascular events occur in people with “normal” cholesterol, so trends matter more than single readings 

The 30s lab profile sits at an inflection point. Single readings matter less, and trendlines matter more. A panel done in your early 30s and again at 35 tells you which markers are stable and which are drifting, which is the kind of intel that’s invisible without consistent testing. 

Your 40s: Catch What’s Shifting 

Small shifts become detectable in your 40s, often years before symptoms appear. Cholesterol creeps up. A1C creeps up. Perimenopause typically begins between ages 40 and 44 for women, and male testosterone has dropped 10 to 15% from its peak. Liver and kidney markers become more useful, annual cadence on cardiometabolic tests beats skipping years, and the recommended tests in your 40s include: 

The numbers explain the cadence: 

  • Perimenopause begins on average between ages 40 and 44 and lasts 4 to 8 years (NIH) 
  • 14% of U.S. adults aged 45 to 64 have diabetes (CDC) 
  • 1 in 4 men aged 45 and older have low testosterone (Endocrine Society) 
  • LDL cholesterol typically rises 5 to 10 mg/dL per decade after age 30 

Two markers do most of the work in this decade, A1C and the lipid panel. Both are inexpensive, both move slowly, and both are early indicators of nearly every condition that gets diagnosed in the 50s and 60s. Schedule an Annual Check-Up Panel to cover the basics, and layer in hormone or testosterone testing on top if symptoms warrant it. 

Your 50s: Screening Density Increases 

Screening density jumps in your 50s. Colorectal cancer screening now starts at 45 per USPSTF. Menopause typically arrives between 45 and 55, and hormone testing answers the “why does this feel different” question. Annual is the default for most metabolic and lipid tests, and some recommended tests in your 50s are: 

  • Annual lipid panel, see Cholesterol/Lipid Panel 
  • Annual A1C, see Hemoglobin A1C 
  • Comprehensive metabolic panel (kidney, liver, electrolytes) 
  • Thyroid panel, since women have about 5x the risk of hypothyroidism by age 50, see Comprehensive Thyroid Panel 
  • Hormone testing for menopause-related symptoms (FSH, estradiol) 
  • PSA for men aged 50 to 70 (USPSTF: shared decision-making), see PSA Test 
  • Vitamin B12, since absorption decreases with age and certain medications 
  • hsCRP for cardiac inflammation risk, see High Sensitivity CRP Cardiac 

The numbers behind the cadence: 

  • Average age of menopause in the U.S. is 51 (NIH) 
  • 27% of U.S. adults aged 65 and older have diabetes, and incidence climbs sharply across the 50s (CDC) 
  • 1 in 5 adults aged 50 and older are vitamin B12 deficient (NIH) 
  • Lifetime cardiovascular event risk crosses 50% for most adults during their 50s (AHA) 

The 50s testing menu is dense because the data finally has enough years of trend behind it to be useful. Lipid trajectory, A1C drift, thyroid changes, and hormone shifts each move on their own timeline, and annual labs are how you separate noise from signal. 

Your 60s: Add Cardiometabolic Density 

Cardiovascular, metabolic, and kidney function take priority in your 60s. New markers earn their place, including hsCRP for cardiac inflammation, eGFR for kidney trends, and B12 for energy and nerve health. Annual cadence is the floor, not the ceiling, and the recommended tests in your 60s include: 

  • Annual lipid panel, see Cholesterol/Lipid Panel 
  • Annual A1C, see Hemoglobin A1C 
  • Kidney function (eGFR via CMP) 
  • hsCRP for cardiac inflammation, see High Sensitivity CRP Cardiac 
  • Comprehensive thyroid panel, see Comprehensive Thyroid Panel 
  • Vitamin B12 and Vitamin D 
  • PSA discussion (USPSTF: not routinely recommended after age 70) 
  • Hormone testing if symptomatic, including testosterone for men and hormone panels for women with persistent menopausal symptoms 

The data behind the recommendations: 

  • 27% of adults 65 and older have diagnosed diabetes, and 49% have prediabetes (CDC) 
  • 38% of adults 60 and older are vitamin D deficient (NIH) 
  • 1 in 7 U.S. adults have chronic kidney disease, and 9 of 10 don’t know they have it (CDC) 
  • Cardiovascular disease prevalence reaches 70% of adults aged 60 to 79 (American Heart Association) 

Kidney function is the underrated test of this decade. The CDC’s 9-of-10-unaware figure is exactly why eGFR, embedded in any standard comprehensive metabolic panel, earns its annual slot here. Pair it with a Cholesterol (Lipid) Panel and you’ve covered the two organ systems that drive most age-60-and-older medical events. 

Your 70s and Beyond: Continue, Don’t Coast 

Testing cadence shouldn’t slow down in your 70s. If anything, it tightens. Skipping annual labs misses the early signal of changes that affect quality of life, like nutritional deficiencies, kidney trends, and thyroid drift. The recommended tests in your 70s and beyond include: 

  • Annual lipid panel, see Cholesterol (Lipid) Panel 
  • Annual A1C, see Hemoglobin A1C 
  • CMP for kidney, liver, and electrolytes 
  • Vitamin B12, since absorption efficiency declines further 
  • Vitamin D 
  • TSH, since subclinical hypothyroidism rises with age, see Comprehensive Thyroid Panel 
  • Iron and ferritin, since anemia of aging is common 

The numbers worth knowing: 

  • About 50% of adults 75 and older have anemia by lab criteria (NIH) 
  • 17% of adults 70 and older have subclinical hypothyroidism (Endocrine Society) 
  • About 25% of adults 75 and older are vitamin B12 deficient (NIH) 
  • Annual lab cadence is associated with earlier detection of metabolic and cardiovascular shifts in older adults 

Annual labs in this decade are less about catching new conditions and more about staying ahead of nutrient absorption, anemia, and kidney trajectory. Quality of life in the 70s and 80s tracks closely with the things B12, iron, thyroid, and kidney function reveal, and small shifts caught early are the easiest to manage. 

Where to Get Tested 

Any Lab Test Now offers direct-access testing without a doctor’s referral at 240+ locations nationwide. Most decade-appropriate panels are available as bundled tests, including wellness panels, hormone panels, cardiac panels, and diabetes panels designed to cover the standard recommendations efficiently. Browse General Health Testing, start with the Annual Check-Up Panel, or add the decade-specific tests above.

Take Control of Your Health!