The Emerging Role of Halloysite Clay Nanotube Formulations in Cosmetics and Topical Drug Delivery.

Natural halloysite clay nanotubes with a 50 nm diameter and a 15 nm inner lumen have recently been explored for numerous medical applications. Due to the tubular morphology and biocompatibility of halloysite, this material can serve as a suitable container for drugs and proteins, allowing their controlled and sustained release over a period ranging from days to weeks. The discovery that it is possible to load a halloysite clay nanotube's inner lumen cavity with a bioactive species has prompted its consideration for pharmaceutical and cosmetic utilization.