Polyhydroxybutyrate (PHB) is a type of biodegradable plastic produced by certain bacteria as a form of energy storage. It belongs to a class of materials known as polyhydroxyalkanoates (PHAs), which are synthesized from renewable resources. PHB is known for its similar properties to conventional plastics, making it a potential alternative for various applications, including packaging and medical devices. Due to its biodegradability, PHB can break down naturally in the environment, reducing plastic pollution. Research into bioplastics like PHB is growing, as they offer a sustainable solution to the environmental challenges posed by traditional petroleum-based plastics.