I’ve seen this on a tv commercial recently. I don’t recall the brand, which is OK because I wouldn’t give them a plug if I did remember it.
It starts out talking about how their deodorant works continuously to stop odor. Turns out that it does this by time-releasing a fragrance.
I had always though that a deodorant would work to prevent or destroy body odor, not mask it. But I check the dictionary and it defines deodorant like this:
a substance that removes or conceals unpleasant smells, esp. bodily odors.
So, masking body odor is a valid function of a deodorant. If you have problems with fragrance chemicals, you may want to keep this in mind when you look for a deodorant you can use.