elicitation and condition optimization, including inoculums density, nutrient content and light condition. In vitro cultures of M. alba especially root culture dry powders exerted a strong anti α-glucosidase activity compared with 1- deoxynojirimycin, one of the most effective iminosugars isolated from M. alba (Hunyadi et al, 2012). Moreover, both in vitro cultures showed strong tyrosinase inhibition. These results conclude that in vitro cultures of M. alba are potential sources of bioactive secondary metabolites