Get a tube of 20% zinc oxide ointment from a drug store or Walmart. After your shower and dry off, smear this on instead of deodorant. My wife and I have used this for many, many years and NEVER have under arm odor. It works better than any deodorant we have ever used. We don't even need it everyday. I use a dab about the size of two green peas under each arm every other day, but you can experiment with the amount and frequency. If you use too much, your pores might get temporarily clogged, so don't over do it. Zinc oxide is the main ingredient in many diaper creams. It simply kills the bacteria which cause underarm odor.
Warning about the zinc oxide ointment for body odor. I agree, it works great. I've been using it for the past 2 weeks, every other day like one of the posts suggests. But... it's not just zinc oxide you're applying -- there's also light mineral, white beeswax and white petrolatum listed as ingredients. Not great things to have absorbed near your armpit lymph nodes! After reading the contents on my tube this morning, I may go back to ACV even though the zinc oxide has been great.
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