I always used deodorant before I went vegan. Now, I often skip it, because there's just no need. I smell better.
"When humans consume flesh from animals, foul-smelling molecules, such as putrescine and cadaverine, are created and absorbed into the bloodstream — and then deposited in the fat tissues," Dr. Klaper says. "As people on leaner diets melt down their fat stores, these fat-soluble molecules flow back into circulation and find their way into skin oil, thus resulting in body odour. As weeks go by on a completely plant-based diet, most people notice that their previously gamy, 'locker-room' body odour becomes far less offensive, or, commonly, disappears altogether." The same thing happened to my partner after he went vegan — and I swear, we aren't smelly! (Here's another recent article on the topic that backs this up.)