Canned food may be convenient, but it is not always the healthiest choice. Canned foods often contain high levels of sodium, sugar and preservatives which can have a detrimental effect on overall health. Additionally, the cans themselves may contain hazardous chemicals such as BPA (Bisphenol A), which can leach into the food.
Sodium
Canned foods can be very high in sodium. The average person should consume no more than 2,300 mg of sodium per day, according to the Dietary Guidelines for Americans.
However, many canned soups and other packaged foods contain 500-1,500 mg per serving. Eating too much sodium can lead to high blood pressure and other cardiovascular issues.
Sugar
Canned fruits are often loaded with added sugar to make them sweeter. While some natural sugar is ok in moderation, added sugars should be limited as they provide empty calories and can lead to weight gain and other health issues such as diabetes.
Preservatives
Many canned foods contain preservatives like sodium benzoate or BHA/BHT which are used to prolong shelf life. While the amounts used are usually low, these additives have been linked to cancer in animals and should be avoided when possible.
BPA:
BPA (Bisphenol A) is a chemical found in some plastic and metal cans that has been linked to a variety of health problems including cancer, infertility, diabetes and obesity. To reduce your exposure to BPA it is best to avoid canned foods whenever possible or switch to BPA-free cans if available.
Conclusion
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In conclusion, canned food is not a healthy choice due to its high levels of sodium, sugar and preservatives as well as potential exposure to hazardous chemicals such as BPA.