Yes, mango peel is antimicrobial. Studies have shown that it can inhibit the growth of a variety of bacteria, including Staphylococcus aureus, Escherichia coli, and Salmonella typhimurium.
The antimicrobial activity of mango peel is due to the presence of phenolic compounds, such as mangiferin, gallic acid, and catechin. These compounds have been shown to have antibacterial, antifungal, and antiviral properties.