Minoxidil
The second mainstay against hair loss — a topically applied vasodilator. Over-the-counter and effective, but it's a lifelong commitment: stop, and the loss returns.
How it works
Minoxidil widens blood vessels and prolongs the growth phase (anagen) of hair follicles, so more and thicker hairs regrow. The exact mechanism isn't fully understood, but the effect is well documented. As with finasteride, the benefit lasts only with continued use.
Dosage
Topical (5%) as solution or foam, 1–2×/day. Effect only with continued use. Low-dose oral minoxidil is increasingly used off-label — that form is prescription only.
Considerations
Topical minoxidil is well supported and available over the counter. Early on there's often a temporary 'shedding' phase (increased shedding) before new growth begins. It's a medication, not a supplement — and only works as long as you keep using it. Oral minoxidil belongs in a physician's hands.
