A blood test tracker that keeps your whole history

Most people get a lab report, glance at it, and file it somewhere. A year later the numbers are gone and the only thing left is the current result — which on its own is the least useful way to read bloodwork.

Why track blood work over time

A reference range tells you where most people sit. It does not tell you where you normally sit. A ferritin of 45 is unremarkable in isolation and worth noticing if you were at 120 two years ago. Tracking turns each result into a data point instead of a verdict.

What Dosely does

• Every panel, kept. Log a test once and keep up to 45 biomarkers, each checked against its range.
• A chart per marker. Tap any biomarker to see its full history.
• Scan the report. Photograph a lab PDF or printout and have the values read for you.
• Supplements alongside. See what a marker did after you started taking something.
• Everyday numbers too. Sleep, water, weight, blood pressure and optional blood sugar.

Track a single marker right here

Each marker below has a plain-language explanation and a tracker you can use in the browser, without installing anything.

• What does a high or low ferritin mean?Ferritin measures your iron stores. Here are the typical ranges, what a high or low result can point to, and when it is worth talking to a doctor.
• Vitamin D levels: what your number meansWhat a 25-hydroxyvitamin D result means, the ranges most labs use, why the units matter, and how quickly the number changes.
• TSH levels and what they say about your thyroidWhat a TSH result means, why high TSH suggests an underactive thyroid rather than an overactive one, and what gets checked next.
• Vitamin B12 levels: what your result meansWhat a vitamin B12 blood test measures, the ranges labs use, why a borderline result often needs a second test, and what commonly causes a low level.

Common questions