A new report has discovered a potential link between deodorants and breast cancer. The research comes because high levels of aluminium have been found in the breast tissue of cancer patients who have had mastectomies. There have been previous warnings that aluminium from deodorants can be absorbed through the skin, especially through shaved armpits. Once it has been absorbed through the body aluminium can mimic the hormone oestrogen and can be involved in the development of breast cancer.