Optimal Range

“Normal” on a blood test means not diseased — not good for living longer. Enter the markers from your standard blood test below. For each one you’ll see your value against both the lab’s normal range and the healthspan-optimal target, plus the single best-evidenced lever that moves it.

Educational only — not medical advice. This tool does not diagnose, treat, or replace your doctor. Ranges are general population targets, not personalised to you; pregnancy, medications, and existing conditions change what’s right. Always discuss your results with your GP. Marker dataset v0 — pending GP clinical sign-off.

Lipids

ApoB (apolipoprotein B) g/L

LDL cholesterol (LDL-C) mmol/L mg/dL ÷ 38.7 = mmol/L

Metabolic

HbA1c (glycated haemoglobin) % also reported as mmol/mol

Fasting glucose mmol/L mg/dL ÷ 18 = mmol/L

Fasting insulin mIU/L

Inflammation

hs-CRP (high-sensitivity C-reactive protein) mg/L

Cardiovascular

Systolic blood pressure mmHg

Diastolic blood pressure mmHg

Nutrient

Vitamin D (25-hydroxyvitamin D) nmol/L ng/mL × 2.5 = nmol/L

Ferritin µg/L

Organ

eGFR (estimated kidney filtration rate) mL/min/1.73m²

ALT (alanine aminotransferase) U/L

Enter as many or as few as you have. Nothing is sent anywhere unless you choose to save, email, or share your report. We log only anonymous counts (start / complete / act) to learn whether the tool is useful.

Optimal Range is part of drhblo.com. Every target above is sourced and evidence-graded; no grade and no source means it does not ship. This is health education, not a consultation — decisions about your health belong with you and your doctor.

Optimal Range

Your healthspan report