Do You Need to Heat Canned Fish Before Eating? Correct and Safe Ways to Consume It

Canned fish It is a popular staple dry food among Thais, whether students, dormitory residents, or working adults, because it is easy to buy, affordable, and has a long shelf life. However, one classic question many people still wonder and debate about is “Do you need to heat canned fish before eating?” Or is opening the can and eating directly harmful to health? Thairath Online has gathered in-depth information from the production process and food safety advice to clarify this question accurately.

Revealing the truth: Is canned fish already cooked inside the packaging?

According to food technology information, "canned fish does not need to be heated before eating." Consumers can safely open the can and eat immediately because, in industrial production, all standard canned fish brands undergo a process called Commercial Sterilization.

This process involves placing raw fish and sauce into cans, sealing them tightly, then subjecting them to high heat under pressure (Retort) at approximately 115–121 degrees Celsius for a sufficient time to destroy microorganisms and bacterial spores, especially Clostridium botulinum, which causes food poisoning. Therefore, the fish inside the can is 100% cooked and safe even before reaching consumers.

Why do some people choose to heat canned fish?

Although eating it straight is safe, many people reheat canned fish for reasons such as:

• Reducing fishy odor Heat helps dissolve the fish oils, making the tomato sauce thicker and richer, effectively reducing the fishy smell.
• Better texture Warm food feels fresher and stimulates appetite more than room temperature food.

Warning! Incorrect ways to heat canned fish risk chemical contamination and explosions

While heating can enhance flavor, it is crucial to avoid boiling or microwaving the fish inside the can. Metal cans reflect microwave waves, which may cause sparks and explosions. Also, directly heating the can over fire risks melting the can's inner coating (such as BPA), contaminating the food and posing long-term health hazards.

Safe ways to eat and heat canned fish

• Transfer to another container before heating Always pour the canned fish into a heat-resistant ceramic or glass bowl before microwaving or heating in a pan.
• Inspect the can's condition Before opening, check that the can has no dents, swelling, rust, or leaks. Damaged cans may allow bacteria to enter and grow, causing food spoilage.