Yes, they are safe. In recent years, certain studies called the safety of the aluminium salts present in anti-perspirant deodorants into question, which was then echoed by the mass media. These salts were subjected to innumerable tests, conducted both by manufacturers of anti-perspirants and by health authorities.
Following the tests, the salts were proven to be the most effective and safest compound for controlling sweat. The Scientific Committee on Consumer Safety (SCCS) has recently confirmed that it has approved their use in current conditions: the legislation in force in fact establishes that the substances with an anti-perspirant action are permitted in cosmetic formulations only in certain concentrations.
On deodorants with medium-high concentrations of anti-perspirant, there must be a warning not to apply them to damaged or irritated skin. The American FDA has also checked the safety of aluminium chloride compounds and has approved their use in anti-perspirant deodorants. Therefore to date there is no reliable scientific evidence that could put the safety of anti-perspirant deodorants that contain aluminium salts into question.
Aluminium salts have been used in total safety for many years, and the anti-perspirant deodorants that contain them conform fully to the strict and severe requisites of European legislation on cosmetic products.