When 'normal' isn't: what 80 blood test reports show

Almost half the people had at least one. Between 5 October and 1 November 2026, 80 people uploaded a blood report to FixFirst and reached their results. For 37 of them (46%), at least one marker we flagged sat inside the reference range printed on their own report, with no H or L beside it. Counted marker by marker, 63 of the 306 flagged results that came with a printed range fell inside it, about one in five. The method and its limits are at the end of this post.

HDL cholesterol topped the list, at 13 of the 80 people. On a lab report, HDL's range is a floor: clear it and the result prints as normal. The NHLBI's ATP III summary draws a second line. Below 40 mg/dL is low, and 60 or above is high, a negative risk factor that removes one other risk factor from the count. The 2018 AHA/ACC cholesterol guideline puts the low line for women at 50. FixFirst flags HDL under the sex-specific low line as low, and anything between that line and 60 as below optimal. Of the HDL cases that also made someone's top 3, six sat in that below-optimal gap and two were under the low line for their sex.

ALT, the liver enzyme, came up for 4 people. The American College of Gastroenterology's 2017 guideline puts the healthy upper limit at 29 to 33 IU/L for men and 19 to 25 IU/L for women, and says values above that should be assessed. FixFirst uses 33 and 25. A woman whose ALT is 30 can see a clean result on her report and still sit above the line the gastroenterologists drew.

HbA1c appeared for 3 people. The American Diabetes Association's Standards of Care define prediabetes as an HbA1c of 5.7% to 6.4%. All three had a value at or above 5.7% that their lab's printed range accepted. That is the clearest disagreement in the set: a result inside a diagnostic band, delivered without a flag.

The rest of the list is short. Hematocrit (5 people), bicarbonate (4), and calcium, vitamin D and BUN (3 each) are the other markers that came up more than twice. For most of these, the line is a FixFirst band tighter than the lab's, not a named guideline cutoff, which is why the post leads with HDL, ALT and HbA1c. Vitamin D shows how much the answer depends on whose line you use. FixFirst flags anything under 30 ng/mL, the cutoff from the Endocrine Society's 2011 guideline. Its 2024 update set no target level at all.

What to do with a flag your lab didn't raise. Take it to your doctor as a question, with the guideline attached. "My HDL is 45 and ATP III calls 60 protective" gives a ten-minute appointment something specific to answer. Some of these gaps are judgement calls, and below optimal is our label for the space between two guideline lines, not a diagnosis. The HbA1c cases are different: a value in the ADA prediabetes band is worth raising whatever the report printed. Our guide to optimal versus normal ranges covers the difference marker by marker.

How we counted. FixFirst keeps anonymous usage events, described in our privacy policy: which markers were flagged, their status, and whether the lab's own printed range accepted the value. No values, names or report files. We took each person's latest report from 5 October 2026, the day we started recording the lab-range comparison, through 1 November, on fixfirst.health only and excluding our own test traffic. A marker counts as "lab said normal" only when the lab printed a range for it, attached no H or L flag, and the value sat inside that range. Two limits matter. Eighty people is a small sample, and they chose to upload, so they may be likelier than most to have something worth checking. And because we don't record values, we can't say how far inside the range each one sat.