Table 1.

Biomarkers of interest.

Category	Tests
Blood	Minerals: Zinc, selenium, magnesium, calcium
	Iron metabolism: Hemoglobin, ferritin, soluble transferrin receptors
	Vitamins: Folate, vitamin B2, vitamin C, vitamin D, holo-transcobalamin, MMA, homocysteine
	Lipids: Cholesterol, HDL, LDL, TAG; fatty acids, serum EPA and DHA
	Glucose, hsCRP, uric acid, creatinine
24-h urine	Iodine, urea, sodium, potassium
Spot urine	Iodine, calcium, creatinine

MMA, Methylmalonic acid; HDL, High-density lipoproteins; LDL, Low-density lipoproteins; TAG, Triacylglycerols; EPA, Eicosapentoenoic acid; DHA, Docosahexaenoic acid; hsCRP, high sensitivity C-reactive protein.