People with high blood pressure have lower blood volume than healthy people.

people with high blood pressure have lower blood volume than healthy people.
Usually they'll have high PTH, serotonin,lactate,aldosterone and low DHT, CO2.
increasing calcium, sodium,potassium and magnesium intake might be very beneficial.
The study
- Hemodynamic role of extracellular fluid in hypertensionCirc Res · 1976 · PMID 773571