Looks like the most effective and reliable thing to do is to get your body to metabolize it out of your system faster,
or at least never swallow any garlic.
https://www.gastrojournal.org/article/S0016-5085(99)70416-6/fulltext
Quote:
Furthermore, aggressive oral hygiene did not prevent the expulsion of allyl methyl sulfide in the breath of individuals who swallowed the garlic.
This contrasts with several studies in the literature reporting that inhibition of production of volatile sulfur-containing gases with oxidizing gums and washes and aggressive teeth brushing and scraping of the tongue eliminates breath malodor resulting from oral sources (Acta Ondontol Scand 1997;55:198-200, J Periodontol 1997;68:1176-1181, J Periodontal Res 1992;27:233-238).
These findings provide a logical elucidation of the nearly universal experience that no matter how much you brush, floss, gargle, and spit, that garlic bouquet just won't quit.
_________________
"There are a thousand things that can happen when you go light a rocket engine, and only one of them is good."
Tom Mueller of SpaceX, in Air and Space, Jan. 2011