Fact Fly: Why Does Spicy Food Burn?

Fact Fly: Why Does Spicy Food Burn?

June 11, 2026 · 29 min

About this episode

This episode explores the science behind why spicy food burns and the evolutionary reasons for its heat.

The Fact Fly's One Big Question Why does spicy food actually burn — and why does black pepper make you sneeze when you haven't even touched it? Join Lauren and the Fact Fly as they investigate the fiery science behind everyone's favorite fake emergency! From the TRPV1 receptor — your mouth's built-in biological fire alarm — to the committed molecular prank that capsaicin has been pulling on mammals for millions of years, this episode reveals that spicy food isn't burning you at all. It's just very convincingly lying to your brain. You'll climb the Scoville Scale from diplomatic bell pepper to the terrifying Carolina Reaper, find out exactly why water makes spicy food worse (and milk makes it better), and discover the remarkably clever reason peppers evolved to be spicy in the first place — a millions-of-years-old plot twist involving birds, squirrels, and some very strategic seed distribution. Plus: why do some people actually enjoy the heat? The answer involves endorphins, context, and what the Fact Fly is now calling "collecting the prize for surviving a fake emergency." Perfect for spice lovers, cautious eaters, and anyone who has ever reached for a glass of water and made…

People in this episode

Host: Lauren

Topics covered

Keywords

Mentioned in this episode

Organizations: Fact Fly

Products: capsaicin

Places: Carolina Reaper, Scoville Scale, black pepper, mammals, birds, squirrels

More episodes of The Reading Bug Podcast - Original Adventures, Bedtime Stories and Music for Kids

Explore listener stats, chart rankings, contacts and more on the The Reading Bug Podcast - Original Adventures, Bedtime Stories and Music for Kids podcast page.