Most food poisoning is preventable with a handful of habits in your kitchen. The basics come down to four principles: keep things clean, keep raw meat away from other foods, cook to the right temperature, and refrigerate promptly. Each one targets a different way bacteria multiply and spread, and skipping even one creates an opening for illness.
Wash Hands, Surfaces, and Produce the Right Way
Illness-causing bacteria survive on your hands, countertops, cutting boards, and utensils, even when they look clean. Wash your hands with plain soap and water for at least 20 seconds, scrubbing the backs of your hands, between your fingers, and under your nails. Do this before you start cooking, after handling raw meat or eggs, and any time you switch tasks in the kitchen. Antibacterial soap isn’t necessary; regular soap works.
After preparing raw meat, poultry, seafood, or eggs, wash every surface and utensil that touched them with hot, soapy water before using them again. For extra protection, you can sanitize countertops with a diluted bleach solution: about two teaspoons of standard household bleach (5.25–6.25% concentration) per gallon of water.
Rinse fruits and vegetables under plain running water before eating or cooking them. Don’t use soap, detergent, or commercial produce washes. Produce is porous, and soap residues can absorb into the food even after rinsing, potentially making you sick. The effectiveness of commercial produce sprays hasn’t been verified either. One exception: don’t wash raw meat, poultry, or eggs. Rinsing them splashes bacteria onto your sink and nearby surfaces without actually removing pathogens.
Keep Raw Meat Separate From Everything Else
Cross-contamination is one of the most common and easily avoidable causes of food poisoning. It happens when juices from raw meat, poultry, or seafood touch foods that won’t be cooked before eating, like salad greens or bread. The fix is simple: use two cutting boards. Dedicate one to raw meat, poultry, and seafood, and a separate one to produce and ready-to-eat foods. Both wood and nonporous boards work, as long as you keep them separate and wash them thoroughly after each use.
The separation starts at the grocery store. Place packages of raw meat and seafood in plastic bags so their juices can’t drip onto other items in your cart or grocery bags. At home, store them in sealed containers or leakproof bags on the lowest shelf of your refrigerator, where drips can’t reach other food. When grilling or serving, use a clean plate for cooked meat rather than the same plate that held it raw.
Cook to Safe Internal Temperatures
Color and texture are unreliable indicators of doneness. A burger can look brown inside and still harbor live bacteria, while a safely cooked chicken breast might have a slight pink tint near the bone. The only reliable method is a food thermometer inserted into the thickest part of the meat.
Here are the minimum internal temperatures that kill harmful bacteria:
- Beef, pork, lamb, and veal steaks, chops, and roasts: 145°F (63°C), then let the meat rest for at least 3 minutes before cutting
- Ground meats (burgers, meatloaf, sausage): 160°F (71°C)
- All poultry (chicken, turkey, duck, whether whole, ground, or in parts): 165°F (74°C)
- Fish and shellfish: 145°F (63°C)
- Leftovers and microwaved food: 165°F (74°C)
Ground meat needs a higher temperature than steaks because grinding mixes surface bacteria throughout the meat. With a whole steak, bacteria sit on the outside where heat hits first. With ground beef, they’re distributed evenly, so the entire interior needs to reach a safe temperature.
If you’re keeping food warm after cooking, for a buffet or a slow dinner, it needs to stay at 140°F (60°C) or above. A chafing dish, warming tray, or slow cooker on the warm setting all work. Anything between 40°F and 140°F is the “danger zone” where bacteria multiply fastest.
Refrigerate Within Two Hours
Bacteria double rapidly at room temperature. Perishable food left out for more than two hours should be thrown away, not saved. If the temperature is above 90°F, like at a summer barbecue or in a hot car, that window shrinks to one hour.
Your refrigerator should be set to 40°F (4°C) or below, and your freezer to 0°F (-18°C) or below. Don’t rely on the built-in dial markings, which are often vague. Pick up an inexpensive appliance thermometer and check periodically, since fridge temperatures can drift when the door is opened frequently or the unit is overpacked.
When storing leftovers, divide large batches into shallow containers so they cool down faster. A deep pot of soup sitting in the fridge can stay warm in the center for hours, giving bacteria time to grow. Shallow containers bring the temperature down quickly and evenly. Get leftovers into the fridge within two hours of cooking or removing them from a warming source.
Thaw and Marinate in the Refrigerator
Thawing meat on the counter is one of the most common kitchen mistakes. The outer layers warm up to room temperature long before the center thaws, creating prime conditions for bacterial growth. The safest approach is thawing in the refrigerator, which keeps the entire piece of meat below 40°F throughout the process. For faster thawing, submerge sealed packages in cold water and change the water every 30 minutes, or use the microwave’s defrost setting and cook the food immediately afterward.
Marinating follows the same logic. Always marinate meat, poultry, and seafood in the refrigerator, never on the counter. If you want to use leftover marinade as a sauce, boil it first to kill any bacteria from the raw meat juices.
Know Which Foods Carry the Most Risk
Some foods are more likely to harbor harmful bacteria than others, even when they look and smell fine. Raw or undercooked sprouts (alfalfa, bean, clover) are a persistent source of outbreaks because bacteria can get inside the seed before the sprout ever grows, where no amount of rinsing reaches them. Cooking sprouts thoroughly is the only way to eliminate the risk.
Unpasteurized juice and cider can contain bacteria that pasteurization would normally kill. Soft cheeses made from unpasteurized (raw) milk, including queso fresco, brie, camembert, and blue-veined varieties, carry similar risks. Check labels: if the cheese or juice says “unpasteurized” or “raw milk,” it hasn’t gone through the heating process that destroys common pathogens.
Reheat Leftovers Properly
Leftovers need to reach 165°F (74°C) all the way through when you reheat them, regardless of the original cooking temperature. This applies whether you’re using a microwave, oven, or stovetop. In the microwave, stir food partway through and let it sit for a minute or two after heating to allow the temperature to equalize, since microwaves heat unevenly. Use a food thermometer to confirm.
As a general rule, use refrigerated leftovers within three to four days. If you won’t eat them in that window, freeze them. Frozen leftovers stay safe indefinitely, though quality declines over time.