9 citations
,
September 2013 in “Journal of histochemistry and cytochemistry/The journal of histochemistry and cytochemistry”
In this study, researchers found that the matriptase-HGF-c-MET pathway may be activated in proliferative cells of human hair follicles and sebaceous glands, suggesting a potential role in hair growth regulation.
86 citations
,
May 2002 in “Journal of comparative neurology”
This study observed that hair follicle innervation in C57BL/6 mice occurs in sequential stages that closely correlate with the development of hair follicles, indicating an interdependent relationship between neuronal and epithelial morphogenesis.
51 citations
,
November 2010 in “Dermatologic Surgery”
This study measured the lengths and depths of different portions of occipital scalp hair follicles and suggested cutting below 1 mm for hair regeneration procedures to avoid damaging the bulge zone.
24 citations
,
September 2002 in “Dermatologic Surgery”
This study describes the anatomy of arrector pili muscles in scalp hair follicular units, proposing a model where a single muscle structure is shared by all follicles within a unit.
Microneedling depth should be customized based on hair type and scalp area, with many users finding 0.5-0.6mm effective for miniaturized hairs to avoid damage. Users report varying pain levels and results, with some preferring shorter needle lengths and others using longer ones like 1.75mm for scalp health and density improvement.
Microneedling should target depths of 0.5mm to 1.5mm for hair loss, with weekly sessions at 1mm recommended. Combining microneedling with Minoxidil is common for improved results.