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Vitamin B12 Deficiency: Signs and Optimal Levels

Last updated: June 2026 - Reviewed by the Apexzen editorial team Part of: Blood Biomarkers Guide Key takeaways Vitamin B12 is essential for nerve function and making red blood cells;...

HbA1c (A1c): What It Means and Your Target Range

Last updated: June 2026 - Reviewed by the Apexzen editorial team Part of: Blood Biomarkers Guide Key takeaways HbA1c (A1c) reflects your average blood sugar over roughly the past two...

ALT Liver Enzyme: Normal Levels by Age

Last updated: June 2026 - Reviewed by the Apexzen editorial team Part of: Blood Biomarkers Guide Key takeaways ALT (alanine aminotransferase) is an enzyme found mainly in the liver; a...

Uric Acid: Normal Levels and What High Uric Acid Means

Last updated: June 2026 - Reviewed by the Apexzen editorial team Part of: Blood Biomarkers Guide Key takeaways A uric acid test measures a waste product made when your body...

eGFR: What Your Kidney Function Number Means

Last updated: June 2026 - Reviewed by the Apexzen editorial team Part of: Blood Biomarkers Guide Key takeaways eGFR (estimated glomerular filtration rate) estimates how well your kidneys filter waste...

ApoB: The Cholesterol Particle Number That Matters

Last updated: June 2026 - Reviewed by the Apexzen editorial team Part of: Blood Biomarkers Guide Key takeaways ApoB counts the number of cholesterol-carrying particles that can lodge in artery...