ChatGPT is a good talker. It isn’t your report.
General AI reads blood tests well. What it doesn’t have is you: your lab’s ranges, your age and sex, your last report. Move the age slider and watch the same TSH value change meaning — on our real ranges.
The honest table
Nine things that matter when you read a blood test — and who has them.
| What matters | ChatGPT | Blood Lab 360 |
|---|---|---|
| Reads the whole report (PDF or photo) | Partlytables and photos often break | Yes |
| Shows you what it read, so you can check | No | Yes |
| Ranges for your age and sex | Often lostguesses the range if you don’t type it¹ | Yes — 26 range sets |
| A source for every range | No | Yes |
| Same report, same answer every time | Noanswers to the same clinical question match only 26–68 % of the time² | Yes |
| Makes things up (hallucinates) | Oftencan invent a range, a study or a “normal” value that does not exist | Ratings neverevery colour comes from a fixed rule in our knowledge base, no AI involved; the chat answers only from your report and sourced ranges, and says so when it does not know |
| Trends across your reports | No | Yes (Premium) |
| A 90-day plan for your values | General tips | Yes (Premium) |
| Ask follow-up questions | Yes | Yes — about your report (Premium) |
| Where your data goes | US servers | Your browser · EU |
¹ Frontiers in Artificial Intelligence, 2025 — 726,000 requests: without a typed range the model guesses it (median variation 26.5 %). ² Frontiers in Digital Health, 2025. We don’t claim AI is wrong. We claim it doesn’t know you.
What ChatGPT does better
We would rather you trust us because we are honest than because we hid the other side.
It will talk about your diet, your sleep, your mother’s diabetes. We stay inside your report and our sourced base.
Already on your phone. Our free plan covers one report; the full toolkit is €19.99 once.
It knows conditions we don’t rate. That is exactly why we recommend using it after your values are explained properly — with the explanation pasted in.
What peer-reviewed studies found
We don’t say AI is wrong. We say it doesn’t know you — and the studies show where that bites. Each card links to the paper.
Without a typed reference range, general models guess it. Across 726,000 requests the guessed lower limit varied by a median 26.5 %, and 8 % of outputs were not in the requested format.
Frontiers in Artificial Intelligence, 2025 ↗Age and sex get lostAccuracy depended on context: it rose from 0.80 to 0.92 when models were given reference ranges, and age and sex biases appeared (blood pressure, BMI).
npj Digital Medicine, 2026 ↗It misses patternsEven the best-rated model gave some answers that were inaccurate or not tailored to the person.
JMIR, 2024 ↗Same question, different answersAsked the same clinical question several times, chatbots gave consistent answers only 26–68 % of the time (guideline questions on sciatica).
Frontiers in Digital Health, 2025 ↗Too calm and too alarmed — at onceIn a structured triage test of ChatGPT Health (960 responses), 51.6 % of emergencies were under-triaged and 64.8 % of non-urgent cases over-triaged.
Nature Medicine, 2026 ↗Confident on false inputFed a false detail, models repeated it confidently in 50–82 % of cases.
Communications Medicine, 2025 ↗A simple rule
You just got a report
Upload it here first. You get a rating for your age and sex, a source for every range, and a plan — without typing anything.
Blood Lab 360You want to talk it through
Copy the explained report into ChatGPT or Claude. Now the conversation is about you, not about the average adult.
BothSomething feels urgent
Neither. Chest pain, severe symptoms, a value we mark red — call your doctor or emergency services.
Your doctorHow to take our explanation into ChatGPT
- Upload your report and open the explanation (free).
- Tap “Copy for AI” — it copies your values, age, sex, our ratings and the sources as plain text.
- Paste it into ChatGPT or Claude and ask your question. The model now argues from your ranges and sources, not from a guess.
- Bring both to your doctor — the explained report and the questions the chat helped you write.
Good to know
Is ChatGPT wrong about blood tests?
Usually not. The best models flag out-of-range values with high accuracy. The problem is what it doesn’t know: your lab’s ranges, your age and sex, your last report — and that it answers differently each time.
Can I use both?
Yes, and we recommend it. Get your explained report here, then copy it into ChatGPT as context. General AI is a good conversation partner once it knows your numbers, ranges and sources.
Where does the data come from?
From 131 markers in our knowledge base, each with a published source (WHO, ESC/EAS, European Thyroid Association, EFSA, AHA/CDC, Endocrine Society and others) and 26 age- and sex-specific range sets.
Does Blood Lab 360 use AI too?
For reading the file and for the chat, yes — but the ratings come from fixed, sourced ranges, not from a language model. The same report always gets the same rating.
Can ChatGPT read blood test results?
Yes, it can read the numbers and explain the terms. It does not know your lab’s range, your age and sex or your last report unless you type them in, and it can answer the same question differently. Give it the lab range and units for every value, and check anything important with your doctor.
Is it safe to upload my blood test to ChatGPT?
Remove your name, birth date, insurance number and barcode first. Health data is a special category under GDPR. Switch off model training in Data Controls or use a Temporary Chat. ChatGPT Health is currently available only to adults in the U.S., not in the EU.
What is a good ChatGPT prompt for blood test results?
State your age and sex, list each value with its unit and the lab’s reference range, add medicines, fasting and pregnancy, and ask for uncertainty, questions for your doctor and sources. Our blog has a copy-ready template.
Where does my report go?
It is processed and stored in your browser. For the chat, your measured values are sent to our AI processor with your separate consent. ChatGPT Health is currently available only in the U.S.; consumer ChatGPT is not a medical device.