Behaviors1 mentions

Use 1–2.5 mm Microneedling Needle Lengths

When using microneedling for hair loss, needle lengths of about 1 mm to 2.5 mm appear more effective than shorter needle lengths.

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“I was also able to glean from this review and some of the papers described within it that needle lengths of about one millimeter to 2.5 millimeters seem to be more effective than shorter needle lengths.”

huberman · The Science of Healthy Hair, Hair Loss and How to Regrow Hair · Apr 10, 2023 · 57:24 · open ↗

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