Carbopol-Based Curcumin Topical Gel for Wound Care: A Comprehensive Review

Wound healing is a complex biological process involving haemostasis, inflammation, proliferation and tissue remodelling. Delayed healing, particularly in chronic wounds, is associated with persistent inflammation, oxidative stress, microbial colonisation and impaired tissue regeneration. Curcumin, the principal curcuminoid of Curcuma longa, has attracted considerable interest as a topical wound-care candidate because of its anti-inflammatory, antioxidant, antimicrobial and pro-healing activities. However, poor aqueous solubility, limited skin permeation, chemical instability and rapid systemic metabolism restrict its conventional pharmaceutical use. Topical delivery through a hydrogel can improve local retention and provide a suitable moist environment for wound repair. Carbopol-940 is a widely used acrylic-acid-based gelling polymer that can produce clear, bioadhesive and shear-thinning gels at relatively low concentrations. This review examines the physiological basis of wound healing, the pharmacological actions of curcumin relevant to tissue repair, and the formulation rationale for Carbopol-based topical gels. Published evidence on conventional gels, nanoemulgels and curcumin-loaded hydrogel systems is critically considered, with emphasis on solubility enhancement, skin permeation, drug release, rheology, antimicrobial activity and wound-healing outcomes. Recent studies indicate that incorporation of curcumin into advanced delivery systems, including nanoemulsions, micelles and other hydrogel platforms, can improve its biopharmaceutical performance compared with unformulated curcumin. Nevertheless, evidence remains heterogeneous and is dominated by in-vitro and animal studies. Further standardized formulation studies, long-term safety assessments and well-designed clinical trials are required before Carbopol-based curcumin gels can be considered established wound-care therapies.