The article reports the development of redox-responsive, self-healing supramolecular hydrogels formed from host–guest polymers. The researchers used cyclodextrin (CD) as a host molecule and poly(acrylic acid) (pAA) with ferrocene as a guest polymer. The hydrogels exhibit reversible sol–gel transitions and self-healing properties due to the complementary interactions between β-CD and ferrocene. The redox potential changes can induce a sol–gel phase transition, and the hydrogels can be healed by re-adhering cut surfaces using redox stimuli. The study demonstrates the potential of these materials for applications in drug delivery and vascular embolization.The article reports the development of redox-responsive, self-healing supramolecular hydrogels formed from host–guest polymers. The researchers used cyclodextrin (CD) as a host molecule and poly(acrylic acid) (pAA) with ferrocene as a guest polymer. The hydrogels exhibit reversible sol–gel transitions and self-healing properties due to the complementary interactions between β-CD and ferrocene. The redox potential changes can induce a sol–gel phase transition, and the hydrogels can be healed by re-adhering cut surfaces using redox stimuli. The study demonstrates the potential of these materials for applications in drug delivery and vascular embolization.