I have personally experienced this. I got Vaginal Odor when I was supplementing liberally with Baking Soda..
After some research, I found that Baking Soda can deplete B-vitamins in the body. I supplemented with B-vitamins and 1 mg of Folic acid. The Vaginal odor was gone gone gone!
Now I use Baking Soda carfully and not by heaping teaspoonfuls. I dont want the Folic Acid deficiency anymore.
Folic acid
Folic acid is needed by the body to utilize vitamin B12. Antacids, including sodium bicarbonate, inhibit folic acid absorption.1 People taking antacids are advised to supplement with folic acid.