Hematocrit

Hematocrit measures the percentage of your blood made up of red blood cells and is a key marker for oxygen delivery, endurance, and cardiovascular strain. It’s especially important to monitor on TRT and performance-enhancing protocols, since elevated hematocrit can raise blood viscosity and increase clotting and blood pressure risk.

Start here

The essentials for hematocrit — then explore the latest posts below.

How to lower hematocrit on trt safely and effectively

How to lower hematocrit on trt safely and effectively

Dr. Alexander Grant, MD, PhD avatar
Dr. Alexander Grant, MD, PhD: Urologist & Men's Health Advocate
Dec 11, 2025 · 10 min read

The safest way to lower hematocrit on TRT is to reduce testosterone peaks—by lowering the dose and/or switching from infrequent injections to more frequent micro-dosing or a steadier transdermal method—because testosterone increases red blood cell production through kidney-driven erythropoietin (EPO) signaling. Since elevated hematocrit affects roughly 5% to 66% of men on therapy, the goal ...

Special OfferLab panels included: $300/year free for all members