What the lab checker does
Enter values from a recent blood test and the checker shows where each falls against commonly cited adult reference ranges, with a plain-English explanation of what the marker measures. It covers markers men over 40 most often ask about: total testosterone, LDL and HDL cholesterol, triglycerides, fasting glucose, hemoglobin A1c, vitamin D (25-OH), TSH, and hs-CRP.
Nothing you type is saved or sent anywhere — the comparison runs entirely in your browser and disappears when you refresh.
Why your lab’s range may differ
Reference ranges are statistical — usually the middle 95% of a healthy reference population — and they vary by lab, testing method, and units. Always compare against the range printed on your own report first. A value just outside the range is not automatically a problem, and a value inside it is not automatically optimal; for example, LDL targets depend on your overall cardiovascular risk.
Getting reliable results
Some markers are sensitive to timing. Testosterone is highest in the morning and is best drawn before 10 a.m. Glucose and triglycerides need a proper fast (usually 8–12 hours). hs-CRP rises temporarily with any infection or a hard workout. One out-of-range result is usually repeated before anything is concluded.
Frequently asked questions
What is a normal testosterone level for a man?
A commonly cited adult male range for total testosterone is roughly 300–1,000 ng/dL, though labs vary and levels change through the day. Symptoms matter as much as the number.
What does hs-CRP measure?
High-sensitivity C-reactive protein is a marker of low-grade inflammation. It is used alongside cholesterol to assess cardiovascular risk and can be temporarily raised by illness or hard exercise.
Is this tool a substitute for my doctor?
No. It is for understanding your numbers. Interpreting results in context — symptoms, medications, history — needs a clinician.