HSA | FSA CARDS ARE NOW ACCEPTED

Hematocrit (HCT) Blood Test

The Hematocrit (HCT) Test measures the percentage of your blood that is made up of red blood cells. Because red blood cells carry oxygen, hematocrit is a practical snapshot of your blood’s oxygen-carrying capacity and can help flag anemia, dehydration, or conditions with increased red cell mass when interpreted with other results. 

Why Measure Hematocrit?

  • Screen for anemia: Evaluate fatigue, weakness, or shortness of breath.
  • Assess hydration: Dehydration can raise HCT; over-hydration can lower it.
  • Monitor change: Track responses to nutrition or medical treatment over time. 

How the PlexusDx Test Works

  • At-home finger-prick with prepaid return mailing.
  • Digital results typically ~2 business days after lab receipt.
  • Order directly; HSA/FSA accepted.

Understanding Results

Your provider interprets HCT alongside hemoglobin, ferritin, and symptoms to determine whether iron deficiency, fluid status, altitude, or other factors are most relevant. Reference ranges vary by laboratory.

FAQs

Do I need to fast?
Not typically. Follow the PlexusDx kit instructions for best results. 

What raises or lowers HCT?
Hydration status, iron availability, altitude, smoking, and some medical conditions can shift hematocrit.