Hematocrit
Hematocrit is the share of your blood volume made up of red blood cells. It moves together with hemoglobin, so the two are almost always read side by side.
Your reading
This app uses 38–50%. Below the range points to anemia or recent blood loss. Above it often just means you were dehydrated when the sample was taken, though altitude, smoking, sleep apnea and testosterone therapy can raise it too.
What may help
- —Being well hydrated on test day for a fair reading
- —Correcting low iron, B12 or folate if your hematocrit is low
- —If you use testosterone, having hematocrit checked regularly, since that is a known side effect
When to talk to a doctor
If it's below 35% or above about 52%, or keeps climbing on repeat tests, since very thick blood raises the risk of clots.
Common questions
What is Hematocrit?
Hematocrit is the share of your blood volume made up of red blood cells. It moves together with hemoglobin, so the two are almost always read side by side.
What is a normal Hematocrit level?
Daygo uses 38–50% as the reference range. This app uses 38–50%. Below the range points to anemia or recent blood loss. Above it often just means you were dehydrated when the sample was taken, though altitude, smoking, sleep apnea and testosterone therapy can raise it too.
How can I improve my Hematocrit?
Being well hydrated on test day for a fair reading. Correcting low iron, B12 or folate if your hematocrit is low. If you use testosterone, having hematocrit checked regularly, since that is a known side effect.
When should I see a doctor about Hematocrit?
If it's below 35% or above about 52%, or keeps climbing on repeat tests, since very thick blood raises the risk of clots.
Source: MedlinePlus (NIH): Complete Blood Count. Reference ranges are standard adult intervals — your own lab may report a different range for your age, sex, or method. This isn't medical advice; always go by the range on your actual results and talk to a clinician about anything that concerns you.