by methanol tested agave varieties and determination of the optimum storing time before extraction in accordance with consumer subjective observations there was recognized the possibility that the agave syrup could have nutraceutical activity applicant considered of great importance to know about the effects that the storing time has over the breast colon and liver cancer cell growth inhibitory activity at the same time there was evaluated the effects of several agave plants coming from different places in order to determine if the place of origin has any significance over the overall effects of the plant there were tested 3 agave syrups obtained from different places and their extracts were obtained by methanol at an 80 as described in examples 2 fig2 shows that breast cancer cells maintain a viability percentage greater than 90 if there are used extracts from agave syrup stored by less than six months however viability percentages didn 39 t come down from 80 even when there were used agave extracts stored for approximately 4 months with regard to colon cancer fig3 comprises a graphic that shows the decrease of the cellular viability with respect to the storing period of the used agave syrup the graphic show that it is necessary to store the agave syrup for more than eight weeks in order to obtain significant effects the agave syrups obtained from three different places decreased the cellular viability to approximately 50 after being stored for approximately four months additionally the effect of the extracts over the liver cancer cells which are shown in fig4 with respect to the storing period of the agave syrup appears to be the same for the breast cancer cells therefore applicant deduced that the agave syrup must be stored for at least 16 weeks in order to extract the active.