No. Many aluminium-free deodorants contain baking soda (sodium bocarbonate), which a base/alkaline substance that many people react badly to. As a substance, it is very safe and used in many household applications, but on your skin it changes the skin's pH from mildly acidic to alkaline, which causes irritation that can be quite severe. If you have sensitive skin, it is recommended to do a patch test before using a deodorant with baking soda in it, or to use a baking soda -free alternative. Check out the full review for some great options to try.