ACTION AND ABSORPTION POSSIBILITY OF ALUM INUM IN INFUSED GREEN TEA, BLACK TEA, OOLONG TEA AND INSTANT COFFEE SOLUTION AT SIMULATED HUMAN GASTRIC-JUICE

In vitro studies on possibility of aluminium absorption into human bod y were carried out using green tea, black tea, oolong tea and instant coffee. Aluminium in green tea and black tea infusions and instant cof fee solution were not found as ion form, but aluminium in oolong tea i nfusion was found as ion form in the range of 10-26% of total aluminiu m. In the case of simulated human gastric juice, aluminium in green te a and black tea did not ionize. About 50% of aluminium in instant coff ee was found in ion form and ionized ratio of oolong tea increased 5-1 0% compared with the former experiment. These results suggest that dai ly intake of teas may not give any adverse effect to human health.