December 4, 2025
Hair today, pull tomorrow
Human hair grows through 'pulling' not pushing, study shows
Internet loses it: fans, bootstraps, and cow licks as hair science flips
TLDR: Scientists found hair is pulled upward by moving follicle cells, not pushed by growth. Commenters turned it into memes—ceiling fans, bootstraps, and cow licks—while others claimed brushing folk wisdom was vindicated, sparking playful debate about what this means for baldness and future treatments.
Hair doesn’t get pushed out—it gets pulled up by a tiny cellular motor, says a new study from Queen Mary University of London and L’Oréal using 3D time‑lapse imaging of living human hair follicles in the lab. Blocking cell division didn’t stop growth, but messing with actin—the protein that helps cells move—slowed it by 80%. Translation: the follicle’s outer layer is doing the heavy lifting, literally, and the internet lost its collective wig. Read the science here: Nature Communications.
Cue the chaos: one commenter announced a baldness recovery plan involving a ceiling fan to help hair “pull” itself back. Another prescribed mustard plus a cow lick for maximum pull and spiritual exfoliation. Meanwhile, bootstraps jokes flooded in—“so it IS possible to pull yourself up”—and a folk‑wisdom victory lap broke out as someone recalled being told brushing “encourages growth.” The thread split between meme lords and mini‑scientists. Meme crew: Baron von Münchausen yanking himself by his own hair. Skeptics: this was done in lab‑kept follicles, so don’t expect your hairbrush to become a miracle device tomorrow. Still, the vibe is giddy: if hair is pulled, could smarter “motor‑boosting” treatments help bald spots? For now, it’s fans, cows, and jokes—plus a rare day when grandma’s brushing advice gets a tiny scientific wink.
Key Points
- •Human hair is pulled upward by coordinated cell movements in the outer root sheath, not pushed by dividing cells.
- •3D time‑lapse microscopy tracked individual cells in living human hair follicles cultured ex vivo.
- •Blocking cell division did not stop hair growth, but disrupting actin reduced growth rate by over 80%.
- •Computational models required a pulling force to match observed hair movement speeds.
- •Findings redefine follicle mechanics and suggest applications in hair disorders, drug testing, tissue engineering, and regenerative medicine.