It turns out that onions contain some pretty cool compounds that might just have anti-diarrheal properties. For example, quercetin, a type of flavonoid found in onions, has been shown to have anti-inflammatory effects, which could help soothe an irritated stomach. And, who knows, maybe the tear-jerking effects of cutting an onion can even help stimulate digestion (just kidding, but wouldn't that be something?)!
Now, let's get to the fun part: onion-based remedies! In some cultures, people mix raw onion with other ingredients like ginger and yogurt to create a soothing stomach paste. And, in other parts of the world, onion soup is a popular remedy for when you've got the runs. Who knew onions could be so... versatile?