Blood Test After 50: What Men and Women Should Monitor

Turning 50 is a physiological inflection point. Cardiovascular disease risk accelerates, cancer incidence rises sharply, metabolic function declines, and the cumulative effects of decades of lifestyle choices start to materialise in measurable ways. The NHS Health Check programme offers a basic cardiovascular risk assessment every 5 years for 40–74 year olds, but it's a blunt instrument — typically measuring just cholesterol, blood pressure, BMI, and HbA1c, with no hormonal assessment, no organ-specific markers, and no micronutrient testing.

A comprehensive blood test after 50 should go significantly beyond this baseline, addressing the specific risks and changes that accelerate in the sixth decade of life.

Cardiovascular Health: The Full Lipid Panel

Heart disease remains the second leading cause of death in the UK, killing approximately 160,000 people annually. Risk increases markedly after 50 in men and after menopause in women (oestrogen's cardioprotective effect diminishes).

A standard cholesterol test measures total cholesterol, HDL, and total-to-HDL ratio. For comprehensive cardiovascular assessment after 50, you need the full lipid panel: total cholesterol, LDL, HDL, triglycerides, and ideally non-HDL cholesterol (total minus HDL, which captures all atherogenic particles). The NICE cardiovascular risk threshold of total cholesterol above 7.5 mmol/L or a QRISK3 score above 10% triggers statin discussion — but these are population-level tools. Your individual risk depends on the full lipid pattern, not just total cholesterol.

Triglycerides above 2.3 mmol/L indicate metabolic dysfunction and are independently associated with cardiovascular events. HDL below 1.0 mmol/L in men or 1.2 mmol/L in women is a strong negative prognostic marker. The ratio of triglycerides to HDL is increasingly used as a practical insulin resistance marker — above 1.5 (mmol/L units) suggests metabolic syndrome components are present.

HbA1c: Diabetes Screening Becomes Essential

Type 2 diabetes prevalence rises steeply with age — approximately 16% of adults over 65 in England have been diagnosed, with an estimated further 5% undiagnosed. The pre-diabetic range (HbA1c 42–47 mmol/mol) is even more common, affecting an estimated 13.6 million adults in England.

HbA1c is the gold-standard screening test, reflecting average blood glucose over 8–12 weeks. At 50, testing annually is appropriate, moving to every 6 months if results are in the pre-diabetic range. Early identification of pre-diabetes allows lifestyle intervention (weight loss of 5–7%, increased physical activity) that can prevent or significantly delay progression to type 2 diabetes.

Liver and Kidney Function

Non-alcoholic fatty liver disease (NAFLD) affects an estimated 25–30% of UK adults and is now the most common cause of liver disease in the developed world. After 50, the risk of progression to fibrosis and cirrhosis increases. ALT, AST, GGT, ALP, bilirubin, and albumin provide a comprehensive liver assessment. GGT is particularly sensitive to fatty liver and alcohol-related liver disease.

Kidney function naturally declines with age — eGFR drops by approximately 1 mL/min/1.73m² per year after 40. By 50, a significant minority of adults have stage 2 chronic kidney disease (eGFR 60–89) without knowing it. High blood pressure and diabetes — both increasingly common after 50 — are the two leading causes of kidney damage. Monitoring creatinine, urea, and eGFR annually catches declining kidney function before it becomes symptomatic.

Thyroid Function and Antibodies

Thyroid disorders become increasingly common after 50, particularly in women. Subclinical hypothyroidism (elevated TSH with normal free T4) affects approximately 10% of women over 55. Symptoms — fatigue, weight gain, constipation, dry skin, and cognitive slowing — are frequently attributed to ageing itself rather than investigated as a treatable condition.

Testing TSH and free T4 is the minimum. Adding thyroid peroxidase (TPO) antibodies identifies autoimmune thyroiditis, which is the most common cause of hypothyroidism in the UK and predicts future thyroid failure even when current function tests are normal. Positive TPO antibodies with a TSH above 4.0 mIU/L warrants discussion about levothyroxine treatment or at minimum 6-monthly monitoring.

PSA: Prostate Cancer Screening for Men

Prostate cancer is the most common cancer in men in the UK, with approximately 52,000 new diagnoses per year. Incidence increases sharply from age 50 onwards, with peak incidence between 65 and 79. Prostate-specific antigen (PSA) is a blood marker produced by the prostate gland — levels rise with prostate cancer, benign prostatic hyperplasia, prostatitis, and age.

PSA screening is controversial because of the risk of overdiagnosis — detecting slow-growing cancers that would never cause harm. However, PSA does detect aggressive cancers earlier, and the evidence supports informed screening (where men understand the limitations) from age 50. Age-specific ranges are: under 3.0 ng/mL for men aged 50–59, under 4.0 ng/mL for 60–69.

A single raised PSA does not mean cancer — it warrants a repeat test in 6–8 weeks, and if still elevated, referral for multiparametric MRI. The trajectory of PSA over time (PSA velocity) is often more informative than a single reading, making annual testing from 50 a sensible baseline strategy.

Full Blood Count: Detecting Silent Anaemia

Anaemia becomes increasingly common after 50 — up to 11% of men and 10% of women over 65 are anaemic. Causes include iron deficiency (which in this age group should always prompt investigation for gastrointestinal blood loss, including colonoscopy), B12 deficiency (absorption decreases with age), and anaemia of chronic disease.

The full blood count identifies not just anaemia but the type: microcytic (low MCV — suggests iron deficiency), macrocytic (high MCV — suggests B12/folate deficiency), or normocytic (suggests chronic disease or mixed cause). This directs further investigation appropriately.

Vitamin D and B12: Accumulating Deficiencies

Vitamin D production in the skin decreases with age — a 70-year-old produces approximately 75% less vitamin D from the same sun exposure as a 20-year-old. After 50, supplementation becomes increasingly important, particularly for bone health (osteoporosis risk rises significantly in postmenopausal women). Levels below 50 nmol/L are associated with increased fracture risk, muscle weakness, and falls.

B12 absorption also declines with age due to decreasing production of intrinsic factor and hydrochloric acid in the stomach. Approximately 6% of adults over 60 are B12-deficient, rising to 20% in over-80s. Metformin — commonly prescribed for type 2 diabetes — further impairs B12 absorption. Deficiency causes fatigue, cognitive impairment, peripheral neuropathy, and macrocytic anaemia. Testing B12 annually after 50, and more frequently if taking metformin or proton pump inhibitors, is advisable.

Ferritin and Calcium

Ferritin in the over-50s serves a dual purpose. Low ferritin indicates iron deficiency (investigate for GI blood loss). High ferritin (above 300 µg/L in men, 200 µg/L in women) may indicate haemochromatosis, chronic inflammation, or liver disease. Haemochromatosis — a genetic condition causing iron overload — is the most common genetic disorder in Northern European populations (1 in 227 of European descent), and symptoms typically present between 40 and 60.

Calcium is relevant for bone health assessment, particularly in postmenopausal women. Adjusted calcium levels also screen for hyperparathyroidism — more common after 50 — which causes bone loss, kidney stones, and fatigue.

Recommended Blood Tests After 50

The Peak Insights 70 biomarker test (£185) is the most comprehensive option and includes every marker discussed above — full lipid panel, HbA1c, liver function, kidney function, thyroid with antibodies, PSA (for men), full blood count, vitamin D, B12, ferritin, calcium, and more. For adults over 50 who want a thorough annual health check, it provides the broadest coverage available from a single blood draw.

The Core Health 45 biomarker test (£120) covers the essential markers at a lower price point — full lipid panel, HbA1c, liver and kidney function, thyroid, FBC, vitamin D, B12, and ferritin. It's an excellent annual screen, with PSA available as an add-on for men.

Testing Frequency After 50

Annual testing is the minimum recommendation. If any markers are abnormal, more frequent monitoring (every 3–6 months) may be appropriate until they're controlled. The cost of an annual blood test is a fraction of the cost — both financial and personal — of a late-diagnosed chronic condition.