Understand your health record.
Plain-English guides to your lab results — how to read your blood work, understand individual markers, and track what matters over time.
Guides & pillars
How to read your results, own your record, and make sense of the whole picture.
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.
How to check your immunization record before changing doctors
Check your immunization record before changing doctors by auditing portals, pharmacies, IIS records, paper files, source proof, conflicts, and unresolved gaps.
How to document partial medical records when only some files arrive
Document partial medical records with received-vs-missing tracking, source names, date ranges, file names, follow-up proof, and safe next steps.
How to export medical records for a specialist
Export medical records for a specialist with a focused packet, manifest, accepted delivery channel, receipt confirmation, and visible record gaps.
How to follow up when a medical records request goes unanswered
Follow up on unanswered medical records requests with a dated proof trail, written status questions, partial-record tracking, and careful escalation steps.
How to Get Your Medical Records: Your HIPAA Right of Access
You have a legal right to a copy of your own medical records and lab results. A practical guide to how to request them — the portal, the written request, the ~30-day timeline, formats, fees — and what to do with them once they're in your hands.
How to keep a missing-record log when portals are incomplete
Track missing medical records from incomplete portals with a simple log for contacted organizations, date ranges, proof, follow-ups, and status.
How to track ferritin, ApoB, and A1c over time
Track ferritin, ApoB, and A1c over time while preserving dates, units, report ranges, source labs, context, and questions for clinician review.
Is It Safe to Upload Your Health Records to ChatGPT?
Before uploading health records to ChatGPT, compare regular chat and Health, check training and retention, minimize identifiers, and verify deletion.
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.
Medical record request template for patients and caregivers
Use these medical record request templates to ask for specific records, date ranges, formats, delivery methods, and caregiver authorization.
Personal health record checklist for chronic conditions
Use this chronic-condition personal health record checklist to organize timelines, medications, labs, notes, diagnoses, questions, and missing records.
TEFCA and medical record access in plain English
Understand TEFCA patient access: how IAS Providers work, what to review before choosing one, why results may be incomplete, and fallback options.
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.
What records to request before changing primary care doctors
Request records before changing primary care with a source archive, focused first-visit packet, medication list, transfer log, and gap check.
What to ask a records department before a specialist appointment
Ask a records department better questions before a specialist appointment: record types, imaging files, deadlines, delivery format, and proof.
Biological Age Test: What It Measures and How to Use the Result
A biological age test estimates how your labs compare with population aging patterns. Learn what PhenoAge measures and how to use it safely.
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.
Connect Your Health Records to Claude (and ChatGPT) With MCP
How to let Claude read your real lab history through Libby's MCP integration — so 'analyze my labs' means your actual numbers, not a generic person's. What MCP is in plain terms, what it enables, and how you stay in control of your data.
How to Export Your Quest & LabCorp Results (PDF/CSV) — and Actually Keep Them
Step-by-step: how to download your results from MyQuest and the LabCorp patient portal as a PDF, when a CSV helps, and the part everyone skips — keeping those results usable over years instead of losing them in a folder.
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 prepare a health summary for a new doctor
Create a one-page health summary for a new doctor with priorities, current medicines, selected history, evidence labels, records, and 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.
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.
Personal Health Record Apps: One Record You Own for Life
Your health data is scattered across portals, PDFs, and apps. Here's what a personal health record (PHR) app is, how it differs from a patient portal, and what to look for in one that tracks your lab results over time.
How to Share Your Lab Results With a New Doctor
A practical guide to sharing lab results with a new doctor: how to gather your records from patient portals, decide what a specialist actually needs to see, and hand off a clean, longitudinal view instead of a pile of PDFs.
Why medical records are still scattered when portals exist
Learn why patient portals do not create one complete medical record, then map each source, preserved copy, provenance check, gap, and next action.
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.
Condition & panel guides
Full panels read together — thyroid, PCOS, perimenopause, longevity.
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.
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.
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.
Marker glossary
One clear explainer per marker — what it is and how to read your level.
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.
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.
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.
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.
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.
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.
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.
Comparisons
How Libby stacks up against other tools — and where your results should live for life.
Libby vs. Healthmatters.io: Two Ways to Track Your Labs Over Time
Healthmatters.io lets you upload lab results and track biomarkers over time — and so does Libby. An honest, feature-by-feature comparison of the closest structural twin to Libby: how results get in, unit reconciliation, biological age, and using your record with ChatGPT or Claude.
Function Health Results: What to Do With Them (and Where They Can Live)
Function Health runs 100+ biomarkers on a membership. But where do your results live long-term, and what do you do with them? An honest look at Function versus a personal health record you own — and how to keep your panel for life.
Libby vs. Apple Health (and a Folder of PDFs): Where Your Lab Results Should Live
Apple Health is excellent for wearables and vitals — but where should your blood test results actually live? An honest comparison of Apple Health, a folder of lab PDFs, and a dedicated lifelong record for tracking markers over years.
Libby vs. InsideTracker: Algorithmic Advice vs. a Record You Own
InsideTracker tests your blood and returns algorithmic recommendations. But where do those results live across every other lab, and can you use them with any AI or clinician? An honest Libby vs. InsideTracker comparison — and why an InsideTracker 'alternative' is often a neutral record you own.
Libby vs. SiPhox Health: The At-Home Test and the Record That Outlives It
SiPhox Health runs at-home blood panels on its own dashboard. But where do those results live for life, across every other lab? An honest comparison of SiPhox and Libby — and why a SiPhox 'alternative' is usually a durable record you own, not a different test.
Libby vs. Superpower: Where Your Annual Panel Should Live for Life
Superpower is a longevity membership built around a big annual biomarker panel. But where do those results live between tests, and across every other lab? An honest Libby vs. Superpower comparison — and why a Superpower 'alternative' is usually a record you own.