Natural products, especially those produced by edible and medicinal plant species, are currently under special investigation as food additives due to their usefulness, accessibility and non-toxic nature. The present study was designed to evaluate the antimicrobial and antioxidant properties of Psidium guajava L. leaves. P. guajava exhibited a broad-spectrum antimicrobial activity since it was active against all Gram positive bacteria, Gram negative bacteria and fungi thus supporting folkloric use in the treatment of some infectious diseases caused by pathogenic microorganisms. A strong...