In the discussion of baking soda remedies, I notices more than one comment about baking soda as a deodorant.
I have not tried barking soda for deodorant, since for the last 20 years my wife and I have used zinc oxide as a deodorant. It works better than any commercial deodorant I ever used. You don't even need to used it every day; just every second or third day does the trick, even in the summer. Never fails.
What I am talking about is the tube of 20% zinc oxide that you can pick up at a drug store or at WalMart here in the USA. Just smear on a little dab under each arm pit after your shower. No stains, no smell, no irritation. If you are concerned about safety, look at diaper ointment; it contains 20% zinc oxide.
The only problem I ever had was when I first tried it and used too much and used it every day and it caused a small swelling in my sweat glands under one arm, I think from blocking perspiration. The swelling went away when I started using it just every other day, on which day I used nothing.
The way I happened on this was my mothers giving me a mineral rock she got at a health food store that was supposed to be used for deodorant. I thought she was nutty, but my wife tried it a couple of times and said she thought it worked a little. We wanted to avoid aerosol and deodorants that contained aluminum, so I looked at the health food store for whatever else they had. Since the mineral rock contained zinc as one of the ingredients, I decided to buy a very expensive cream deodorant that contained zinc as one of the ingredients, and it worked very, very effectively, except that it cost a fortune. I happened to see zinc oxide in a tube at the drugstore for only $0.65 per tube (20 years ago) so I tried it instead of the expensive health food zinc cream, and it worked.
I've used Zinc Oxide Ointment as a deodorant for years. Works like a Charm! I apply it after a bath around my armpits and then put on a clean "T" shirt so it doesn't stain clothes. Once a week in winter and two or three times a week in Summer.
Michelbach-le-bas, Alsace, France