• Welcome to Phoenix Rising!

    Created in 2008, Phoenix Rising is the largest and oldest forum dedicated to furthering the understanding of, and finding treatments for, complex chronic illnesses such as chronic fatigue syndrome (ME/CFS), fibromyalgia, long COVID, postural orthostatic tachycardia syndrome (POTS), mast cell activation syndrome (MCAS), and allied diseases.

    To become a member, simply click the Register button at the top right.

Nutreval Test: blood vs urine?

ebethc

Senior Member
Messages
1,901
I'm taking the nutreval test & wonder if it's better to submit a blood sample or a urine sample for testing. It seems like a big difference. Does anyone know if one provides more accurate results than the other?

Thanks