Four times the hair, against minoxidil alone
One hundred men were split into two groups for twelve weeks. One used 5% minoxidil twice a day. The other used the same minoxidil and added microneedling once a week. The microneedling group gained 91 hairs per square centimetre against 22, and 82 percent of them put their own improvement above half, against 4.5 percent.
