Many deodorants contain paraben preservatives which have been linked to breast cancer. Organic deodorants don't contain parabens. Try Green People Aloe Vera Organic Deodorant. It's £7.95 but as well as being chemical free, it is also fragranced using essential oils which can benefit the skin rather than synthetic ingredients which can irritate. Modern antiperspirants suppress the body’s vital function of perspiration, by blocking pores with aluminium salts such as aluminium chlorohydrate. This one does not.