lab results
38 articles tagged lab results.
How to Combine Lab Results From Different Labs Into One Timeline
Quest, LabCorp, Function, and hospital portals each report your labs their own way — different units, different reference ranges, different formats. Here's why unifying them is genuinely hard, how to do it by hand, and how Libby automates it into one timeline.
Markers That Move Together: Reading Your Labs in Groups
Lab markers cluster and move as groups — lipids, the insulin-resistance cluster, thyroid, iron, and liver. Why reading the pattern across related markers beats reading any single value in isolation.
Understanding Lab Reference Ranges: What 'Normal' Really Means
What a lab reference range actually is, how labs derive it from a reference population, why 'normal' varies by lab, age, and sex — and the crucial difference between a reference range, a guideline treatment target, and an invented 'optimal' number.
Albumin: What It Is and How to Read Your Blood Level
What albumin measures, the reference ranges labs actually use, why liver, nutrition, and inflammation all affect it, and how to track albumin over time — plus why 'optimal' is debated.
ALP (Alkaline Phosphatase): What It Is and How to Read Your Level
What ALP measures, the reference ranges labs actually use, why liver and bone both drive it, and how to track your alkaline phosphatase over time — plus why 'optimal' is debated.
ALT (Alanine Aminotransferase): What It Is and How to Read Your Level
What ALT measures, the liver-enzyme reference ranges labs and guidelines actually use, and how to track your ALT over time — plus why a single 'optimal' number is debated.
ApoB: What It Is and How to Read Your Level
What apolipoprotein B (ApoB) measures, the reference ranges cardiology guidelines actually use, and how to track your ApoB over time — plus why a single 'optimal' number is debated.
AST (Aspartate Aminotransferase): What It Is and How to Read Your Level
What AST measures, the reference ranges labs actually use, why the AST-to-ALT ratio matters, and how to track your AST over time — plus why a single 'optimal' number is debated.
Blood Test Markers Glossary: Every Marker, Grouped by Body System
A plain-English blood test markers glossary — common lab markers grouped by body system, each with a one-line explainer and a link to its full guide with reference ranges and how to track it over time.
DHEA-S: What It Is and How to Read Your Level
What DHEA-S (DHEA sulfate) measures, why 'normal' ranges drop steeply with age and differ by sex, the referenced ranges, and how to track DHEA-S over time alongside other hormones.
eGFR and Creatinine: What They Are and How to Read Your Kidney Numbers
What creatinine and eGFR measure, the reference ranges KDIGO and labs actually use, and how to track your kidney function over time — plus why a single 'optimal' number is debated.
Estradiol (E2): What It Is and How to Read Your Level
What estradiol (E2) measures, why a 'normal' level depends heavily on sex, menstrual-cycle phase, and menopausal status, the referenced ranges, and how to track estradiol over time.
Fasting Glucose: What It Is and How to Read Your Level
What fasting glucose measures, the reference ranges the ADA uses for normal, prediabetes, and diabetes, and how to track it over time — plus why a single reading is noisy.
Ferritin: What It Is and How to Read Your Iron-Storage Level
What ferritin measures, the reference ranges WHO and labs actually use, why it doubles as an inflammation marker, and how to track ferritin over time — plus why 'optimal' is debated.
Free T3: What It Is and How to Read Your Level
What Free T3 (free triiodothyronine) measures, the typical lab reference ranges, why 'optimal' is assay-dependent and debated, and how to track Free T3 over time with TSH and Free T4.
Free T4: What It Is and How to Read Your Level
What Free T4 (free thyroxine) measures, the typical lab reference ranges, why 'optimal' is assay-dependent and debated, and how to track Free T4 over time alongside TSH and Free T3.
HbA1c: What It Is and How to Read Your Level
What HbA1c measures, the reference ranges the ADA uses for normal, prediabetes, and diabetes, and how to track it over time — plus why it can mislead in some people.
HDL Cholesterol: What It Is and How to Read Your Level
What HDL cholesterol measures, the reference ranges from ATP III and the AHA, and how to track your HDL over time — plus why 'higher is always better' turns out to be wrong.
Homocysteine: What It Is and How to Read Your Level
What homocysteine measures, the reference ranges labs and AHA actually use, its link to B vitamins and cardiovascular risk, and how to track it over time — plus why 'optimal' is debated.
How to compare Quest and Labcorp results over time
Compare Quest and Labcorp results without forcing unlike tests into one trend: preserve reports, check five gates, and prepare clinician questions.
How to organize years of blood test results
Organize years of blood test results into a verified timeline with source files, exact units and ranges, missing-record notes, and clinician questions.
How to Read Your Blood Test Results
Read blood test results without guessing: preserve the exact test, value, units, range, date, source, context, and questions for clinician review.
hs-CRP: What It Is and How to Read Your Level
What high-sensitivity CRP measures, the cardiovascular risk categories from the AHA and CDC, and how to track it over time — plus why one high reading usually means retest.
How to Use Your Lab Results With ChatGPT (and Claude)
Can ChatGPT read your blood test results? Yes — but only if you give it your actual numbers, with structure and history. Here's how to feed an AI your real labs, why generic advice fails without them, and how to do it while keeping your data yours.
LDL Cholesterol: What It Is and How to Read Your Level
What LDL cholesterol measures, the reference ranges from ATP III and ACC/AHA, and how to track your LDL over time — plus why 'optimal' depends on your personal risk.
The Longevity Blood Panel: What to Test and Track
The longevity blood panel explained — ApoB, Lp(a), hs-CRP, HbA1c, albumin and more, why each marker matters for healthspan, and why the trend beats any single number. Educational, not medical advice.
Lp(a): What It Is and How to Read Your Level
What lipoprotein(a) measures, the thresholds the EAS and NLA use for elevated risk, and how to track it over time — plus why it's mostly genetic and hard to lower.
Omega-3 Index: What It Is and How to Read Your Level
What the omega-3 index measures, the target zones researchers propose, why it isn't an official guideline range, and how to track it over time — plus why 'optimal' is debated.
PCOS Labs: The Hormone Panel Guide (Testosterone, DHEA-S, Glucose & More)
A plain-English guide to the PCOS hormone panel — what testosterone, DHEA-S, estradiol, fasting glucose, and HbA1c measure, why they're ordered, and how to track them with your clinician. Educational, not medical advice.
Perimenopause & Menopause Labs: Which Blood Tests Matter
A guide to perimenopause and menopause labs — estradiol, FSH, TSH, ferritin, glucose and the cardiometabolic markers worth tracking through the transition, and why hormone tests can mislead. Educational, not medical advice.
RDW (Red Cell Distribution Width): What It Is and How to Read Your Level
What RDW measures, the reference ranges labs actually use, why variable red-cell size matters for nutrition and aging, and how to track it over time — plus why 'optimal' is debated.
Testosterone: What It Is and How to Read Your Level
What total and free testosterone measure, the Endocrine Society's harmonized reference range, why 'optimal' depends on age and sex, and how to track testosterone over time.
How to Read a Thyroid Panel: TSH, Free T4, and Free T3 Explained
How to read a thyroid panel — what TSH, free T4, and free T3 measure, how clinicians interpret them together, and how to track your thyroid results over time. Educational, not medical advice.
Triglycerides: What They Are and How to Read Your Level
What triglycerides measure, the reference ranges from ATP III and ACC/AHA, and how to track them over time — plus why fasting and recent meals change the number so much.
TSH: What It Is and How to Read Your Level
What TSH (thyroid-stimulating hormone) measures, the reference ranges the American Thyroid Association and labs actually use, why the 'optimal' upper limit is debated, and how to track TSH over time.
Vitamin B12: What It Is and How to Read Your Blood Level
What a vitamin B12 test measures, the reference ranges labs actually use, why the 'gray zone' needs confirmatory tests, and how to track B12 over time — plus why 'optimal' is debated.
Vitamin D (25-Hydroxyvitamin D): What It Is and How to Read Your Level
What a vitamin D test measures, the deficiency thresholds the Endocrine Society and IOM actually use, and how to track 25-OH-D over time — plus why 'optimal' is genuinely debated.
What to give ChatGPT before asking about lab results
Prepare cleaner lab context for AI conversations with dates, units, reference ranges, symptoms, medications, and questions to verify with a clinician.