Hematocrit is the EQ side people forget to track until it's already a problem. It raises red blood cell count more than anything else in a typical stack - hemoglobin can push toward 20 when you're trying to stay under 17.5. Donate blood before it becomes an issue, not after. And hydrate hard before any bloodwork because dehydration alone can make the number look significantly worse than it actually is. That wired 3am anxiety feeling at 600 plus is real too - if it becomes unmanageable, dropping to 400-500mg per week sorts it for most without losing the compound's benefits.