This baking soda free formula contains two great ingredients to combat smells-
zinc ricinoleate- traps and absorbs odour causing molecules. 
magnesium hydroxide- balances the pH in your underarms to create an unfriendly environment for odour causing bacteria as well as absorbing odours
 
Cornstarch absorbs sweat and the oils will moisturise and soften your armpits. To apply rub a small pea sized amount into each armpit.
 
If you are new to natural deodourants there's some things you need to know! Aluminium based products block pores whereas natural deodourants let the natural sweat process happen but combat the odour causing bacteria on the skin. To balance this bacteria there's an detox period of about four weeks where you become more sweaty and stinky but if you push through this will pass!
Natural deodourants don't last the 24 hours like aluminium based ones and I find I have to reapply after 12 hours. You may sweat more than a aluminium based deodourant but it should be odourless.