"Within range" is not the same as thriving.
Lab reference ranges are built on the population average. That is exactly why the average shouldn't be your target.
Your results come back with a column called "reference range". If your number sits inside it, the printer marks it blue. If it sits outside, it marks it red. Your doctor reads the red marks. The rest gets ignored.
The trouble is that the blue range isn't built on healthy people. It is built on the average.
How a reference range is built.
A lab takes a sample of people: the ones who walk in for a test over a given period. It measures the marker. It drops the top 2.5% and the bottom 2.5%. Everything in between is called "normal".
That means the range reflects how the Italian population is doing, not how you should be doing. A population where more than one adult in two is vitamin D deficient, and one in three has ferritin below the optimal level.
If your target is the average, the average is your ceiling. We don't think the average is a good place to aim for.
Normal vs. optimal.
- Vitamin D: lab range 30 to 100 ng/mL. Optimal: 50 to 80.
- Ferritin: range 15 to 300 ng/mL. Optimal: 60 to 120 for women, 100 to 200 for men.
- hsCRP: range under 10 mg/L. Optimal: under 1.
- HbA1c: range under 6.5%. Optimal: under 5.4%.
These aren't made up targets. They are the numbers the literature ties to the lowest risk of chronic disease. The space between "normal" and "optimal" is huge, and it is where most people who feel vaguely tired without knowing why tend to live.
What changes with Rosa.
We read your values against the optimal target, not just "within range". And more importantly, we compare you against yourself: your panel six months ago. Because your own curve matters more than anyone else's average.
