Complex sentence: Minoxidil does not, however, provide any protection to the follicles from further DHT damage, and when a follicle eventually becomes completely destroyed by DHT, minoxidil will no longer be able to have any more regrowth effects on that follicle.
Split into simpler sentences: Minoxidil does not, however, provide any protection to the follicles from further DHT damage. When a follicle is destroyed by DHT minoxidil will no longer be able to have any more regrowth effects on that follicle.