Ferritin [Mass/Vol]
Ferritin is your iron storage protein—it’s the best marker for how much iron your body actually has in reserve. Low ferritin can tank your energy, recovery, endurance, and focus—often before hemoglobin or RBC markers crash. High ferritin, on the other hand, may reflect inflammation or iron overload. It’s one of the most critical markers for oxygen delivery, especially if you train hard, fast, or sweat a lot.solve real problems with clean design and honest materials.
$8.44 USD