The very next sentence from that quote sounds a lot worse and harder to explain away though:
> In at least one case cited in the investigation, baking powder was mixed into food to make tourists physically unwell.
> In at least one case cited in the investigation, baking powder was mixed into food to make tourists physically unwell.
A small amount won't make a different, it'll just stimulate a bit more H+ production from your stomach's proton pumps.
Edit: The article I read claims the scam involved baking powder, which makes even less sense given that it's even more noticeable, bitter and metallic.