Is it toxic to drink canned drinks when heated

Heating canned beverages for consumption usually does not produce toxicity, but may affect taste and packaging safety. The epoxy resin coating on the inner wall of aluminum cans is relatively stable at conventional heating temperatures, but high temperatures or prolonged heating may cause coating damage or trace metal precipitation.

The design storage temperature of commercially available canned beverages is generally below 50 degrees Celsius, and the risk of drinking them when heated with warm water for a short period of time is relatively low. Common heating methods include water-resistant heating or low-temperature heating with a milk warmer, avoiding direct boiling or microwave heating. Aluminum cans may deform above 100 degrees Celsius, causing local peeling of the inner wall coating, but a very small amount of aluminum precipitation usually does not reach the toxic dose. Acidic beverages such as carbonated drinks may accelerate metal dissolution. It is recommended to heat them in a glass container after opening.

Beware of risks in special circumstances. Some inferior tank bodies may have coating process defects, resulting in increased migration of substances such as bisphenol A at high temperatures. Repeatedly heating the same can of beverage may result in prolonged contact time between the contents and metal. Heating sugary drinks in diabetes patients may accelerate Maillard reaction to produce acrylamide. In such cases, it is recommended to choose aseptic paper packaging drinks for heating.

It is recommended to control the heating temperature below 60 degrees Celsius for daily consumption, and the heating time should not exceed 10 minutes. Sensitive groups such as infants, pregnant women, etc. should prioritize choosing Tetra Pak packaged drinks labeled as heatable. If there is obvious deformation of the tank after heating, suspended solids or metallic smell in the liquid, drinking should be stopped immediately. Proper storage of unopened canned beverages should avoid direct sunlight and high temperature environments. It is recommended to consume within 2 hours after opening.