🩸 Iron deficiency anemia (IDA) is surprisingly common in people with POTS and MCAS—and it’s often missed. Yes, it can come from heavy periods (thanks to heparin, a blood thinner released by mast cells), but here’s the twist... 👉 You can be iron deficient even without visible blood loss. Why? Because MCAS can inflame the small intestine, making it harder to absorb iron—even when you’re eating plenty of it or taking supplements. 😵‍💫 The result? Fatigue. Brain fog. Exercise intolerance. Sound f