For many of us, it’s second nature: cook a large batch of rice, save the extra, and pop it in the fridge for another meal. It’s convenient, efficient, and a common part of meal prep routines around the world.

But what many people don’t realize is that cooked rice—if not handled properly—can become a source of foodborne illness, even when stored in the refrigerator.

Why Rice Needs Special Care

The main concern is a naturally occurring bacteria called Bacillus cereus. These bacteria are found in soil and can cling to uncooked rice grains. While cooking kills most bacteria, Bacillus cereus spores can survive high heat.

If rice is left at room temperature for too long before being refrigerated, these spores can multiply. And even if the rice is reheated, the toxins produced by the bacteria may still remain—since they’re not always destroyed by heat.

Common Symptoms to Watch For

Foodborne illness from Bacillus cereus can appear quickly—typically within 1 to 5 hours—and may cause nausea, vomiting, or diarrhea. For most healthy adults, symptoms are short-lived, but children, older adults, and individuals with weakened immune systems may be more vulnerable to discomfort.

How to Store Rice Safely

The good news? It’s easy to reduce the risk by following a few simple food safety tips:

Cool quickly: Don’t leave cooked rice sitting out for more than an hour. Spread it in a shallow container or tray to speed up cooling before placing it in the refrigerator.
Use airtight storage: Store rice in a sealed container and place it in the coldest part of the fridge. Avoid leaving it uncovered or near the door where temperatures fluctuate.
Use within 1–2 days: Even when stored properly, rice should be eaten within a couple of days to reduce risk.
Reheat only once: Only warm the amount you plan to eat, and make sure it reaches at least 165°F (74°C). Avoid reheating the same portion multiple times.
Use more than just your senses: Spoiled rice won’t always look or smell bad. When in doubt, it’s safest to discard it.

Final Thoughts

While refrigerators help slow the growth of harmful bacteria, they don’t eliminate all risks—especially if food wasn’t handled properly before chilling. That’s why timing and storage methods matter so much.

Rice is a delicious and versatile food, and there’s no need to avoid leftovers altogether. Just be mindful of how you prepare, store, and reheat it. A little care can go a long way in keeping your meals safe and enjoyable.