Retinoic acid

The other mechanism that closes a human growth plate, and the one where the exposure is almost always a drug: what retinoids do to cartilage, and what their labels require in children who are still growing.

Retinoic acid: vitamin A becomes retinoic acid, which binds an RAR and RXR pair on DNA. In a growth plate it lowers division and brings the swelling step forward, so the plate is spent and closes early. Vit ARARAR + RXRtarget genesRetinoic acidOn the genePlate spentfrom vitamin ARAR with RXRswells sooner

Two mechanisms are documented to shut a human growth plate. One is oestrogen, which does it as part of puberty (see Oestrogen). The other is retinoid excess, and the exposure is iatrogenic.

In this article

  • How the signal works
  • Why excess consumes the plate
  • Premature closure in people
  • What the labels require
  • Compounds
  • Summary

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Educational content, not medical advice. Nothing here is a recommendation to take or stop taking anything — talk to a doctor about your own situation.