Relevent sentences from the abstract: At this rate, about 4 μg of aluminium is absorbed from a single use of ACH on both underarms. This is about 2.5% of the a

Relevent sentences from the abstract: At this rate, about 4 μg of aluminium is absorbed from a single use of ACH on both underarms. This is about 2.5% of the aluminium typically absorbed by the gut from food over the same time period. Therefore, a one-time use of ACH applied to the skin is not a significant contribution to the body burden of aluminium.