Luria-Bertani Broth, often abbreviated as LB Broth, is a nutrient-rich liquid medium used for the growth of bacteria, particularly Escherichia coli. It contains peptones, yeast extract, and sodium chloride, providing essential nutrients for bacterial proliferation. LB Broth is commonly used in molecular biology and microbiology laboratories for culturing and maintaining bacterial strains. This broth is favored for its simplicity and effectiveness, allowing researchers to cultivate large quantities of bacteria for various experiments, including cloning and protein expression. Its composition can be modified to suit specific experimental needs, making it a versatile tool in scientific research.