A slow poison [SEP] I really liked the Charcoal & Magnesium variety, used it for one month, wasn't able to find it in the store so I switched to Lavender & Sage..  After a few days of using Lavender & Sage I got a painful alkaline burn.  I have discovered this is due to the high baking soda content of these products.  I tried to switch back to the Charcoal & Magnesium and encountered the same issue :(  I really want to keep using them but my armpits got dark and were extremely painful.  I am now using the sensitive-skin variety which is baking soda free.  Not sure why they don't just make all of them baking soda free, as it's not a good thing to have in contact with your skin all day