Am new to mumsnet. I have been using bicarbonate of soda since teen years or from when I needed to, I am near 50 yrs old and am still using this, also use this as foot deodorant as well. Other so called nonaluminum deodorant sold in shops have a list of other chemicals.
I have already suggested this to my daughter, although only 9, may soon have that "smelly underarm odour problem".