Why does my armpit itch so badly?

[Nars_Glinley]

@Dashellda

I use my own homemade deodorant which is amazing believe it or not I make it from 6 tablespoons of baking soda from the who whole foods store 6 tablespoons of cornstarch from whole foods store too and 12 tablespoons of coconut oil and a few drops of essential oil if you like, like lavender
If it’s warm out just dip your fingers and rub onto your armpits trust me you will be smell free all day it’s amazing and healthy ��

Why do you buy baking soda and cornstarch from the whole foods store? Do you believe that they are different from the garden variety supermarket kinds?