Derma roller for hair loss on a bathroom shelf beside a minoxidil bottle
Derma Roller for Hair Loss: 6 Essential Facts the Trials Show
The comparator nobody mentions. Dhurat’s famous result, 91.4 hairs against 22.2, is quoted everywhere as proof that microneedling grows hair. Both arms were on minoxidil. The trial compared drug-plus-roller against drug, which means it’s evidence for the combination and says nothing about rolling alone. All twelve randomized trials in the 2025 meta-analysis did the same…

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