Great tip! I love gardening and work up a big sweat and never had an uncommon issue with BO until this year at age 76. Just washing with my allergy free soap didn't eliminate the odor even after showering. Your tip about vinegar works for me. I am allergic to several ingredient in most deodorants. Tom's fragrance free was the cleanest commercial deodorant product allergen free for me and it worked for years, but stopped about 6 months ago plus it would irritate my underarms if I used it more than every other day. Yes after gardening I'll still get BO but I discovered the benefits of vinegar. At the start of my shower I spray or splash a mixture of equal parts vinegar and water under my arms, wait a minute then rub in well with my lard and glycerin soap, like Grandma's (also allergy free for me). I wait to rinse off until the end of the shower. I do this daily. So far now after months of doing this no irritation. Apple Cider Vinegar was recommended. but I've also read that basic inexpensive White Vinegar also works.
Before, simply using soap wasn't enough to kill the odor totally.
As far a feminine odor which I also developed later in life when hormones were no longer prescribed I've got that solved. No issues anymore because of a vaginal ring with time released estrogen, Estring. Expensive, but so worth it to me. I can't use inserted estrogen creams or foams because of the inactive ingredient in this topical estrogen because in middle age I developed severe Allergic Contact Dermatitis, ACD. This ring, Estring, stays in for 3 months and has restored my natural secretions which clean out the vagina. If you don't have allergies to the inactive ingredients try the topical vaginal creams to save money.
Keep searching like Minnesota10 and I did.