Ulva lactuca, a green marine macroalga, is known for its potential health benefits due to bioactive compounds such as phlorotannins (PhT). This study aimed to identify and characterize the PhT profile in Ulva lactuca, evaluate their bioaccessibility, and explore their potential therapeutic targets through pharmacological network analysis. The study identified twenty PhT, showing a bioaccessibility of 54 %. Pharmacological network analysis revealed 54 potential targets associated with various disease pathways, including cancer. The findings highlight the nutritional value of Ulva lactuca and suggest the therapeutic potential of its PhT, offering new insights for future research and health applications.