Commercial deodorants contain all sorts of nasty extras which irritate the skin. Ingredients in deodorants have now been linked with all sorts of unpleasant side effects and potentially harmful substances to the environment. I’ve tried lots of eco brands but this is by far the cheapest and the most effective method.
Baking Soda/Sodium Bicarbonate
Simple sprinkle a little underneath your arms and rub in gently. Amazingly effective.