magnesium antagonizes calcium influx, it obviously changes contraction of muscles. But here's the thing, arterial stiffness, which we know predispose s on to hy pertension and damage down the track, magnesium supplement long term improves arterial stiffness. The most recent meteranalysis, last three demonstrated that in very high ranking journals, that magnesium b obviously need a g p a or a cardiologist to talk about the doses.