The evidence is convergent. Multiple independent sources reach the same conclusion, the underlying mechanism is well-characterized, and even the field's most cautious voices treat it as worth doing.
Minoxidil, sometimes also referred to by the brand name ROGAINE, was actually a drug that was developed to treat hypertension. This is a cardiac drug that lowers blood pressure, and it does that by causing vasodilation. It allows more blood flow, not just to the hairs on your scalp, but to hairs everywhere on your body.
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This is minoxidil also known as Rogaine. It was first discovered in the 1960s from a group that was trying to lower blood pressure. So what it does is it stimulates nitric oxide production.
minoxidil is clearly a vasodilator it's used for people with blood pressure problems as well i've had when i worked in cardiology as a physician assistant minoxidil was a fourth line treatment for resistant secondary hypertension and minoxidil is a very potent vasodilator so wouldn't it make sense with all these other mechanisms that something that vasodilates the blood supply of the scalp could improve hair regrowth