Blood Testing & Analysis
Understanding your blood test results is the most objective way to assess your nutritional status. This section explains what common biomarkers mean, what the reference ranges actually represent and when they should prompt action.
What this section covers
- How to interpret vitamin D, B12, iron panel, magnesium and zinc results
- The difference between deficiency, insufficiency and optimal levels
- When lab ranges differ from functional optimal ranges
- How to work with your doctor to use testing strategically
- At-home testing options — what's reliable and what isn't
Key biomarkers we'll cover
Articles for each biomarker below are in development. They will cover interpretation, reference ranges, deficiency thresholds and links to our supplement fact reviews.
The gold standard test for vitamin D status. What the number means and what level is actually optimal.
Haemoglobin alone doesn't tell the full picture. Ferritin and transferrin saturation matter too.
Standard lab ranges miss a large portion of functional deficiency. Learn why and what to look for.
Serum magnesium is a poor marker of tissue stores. RBC magnesium is far more informative.
Zinc is difficult to assess accurately. Understanding the limitations of current testing methods.
Thyroid function intersects with selenium, iodine and zinc status in important ways.