My Grandma Reheats the Same Rice for Days — Is That Why People Get Food Poisoning?

Yes — and it’s one of the few food safety myths that’s actually true.

Why rice is riskier than other leftovers Raw rice can carry spores of a bacteria called Bacillus cereus, which survive cooking. If cooked rice sits at room temperature for hours, those spores wake up and multiply, producing a toxin that reheating does not destroy. The rice looks and smells normal even when it’s risky — that’s what makes it sneaky.

How to store and reheat rice safely Cool rice within an hour of cooking, refrigerate it, and only reheat it once. Rice left out overnight on the counter should be thrown out — reheating won’t fix it.

Takeaway: the danger isn’t the rice itself, it’s how long it sat out before you reheated it.

FAQ How long can cooked rice sit at room temperature? No more than 1–2 hours before bacterial growth becomes a real risk. Can you reheat rice twice? It’s best to reheat rice only once, and only if it was cooled and stored properly.