Fact #20: Some canned foods contain more nutrients than fresh!
The canning process increases the availability of certain nutrients. Canned pumpkin contains more beta carotene than fresh pumpkin, canned tomatoes have more lycopene than fresh tomatoes, canned fish has higher calcium levels than fresh fish and canned blueberries have more key anthocyanins (antioxidants) than fresh blueberries. Also, a study at Cornell University confirmed that the short, high temperature heating process used by the canner actually improves the nutritional value of asparagus, green beans, spinach, tomatoes, corn and carrots.
Fact #22: The ridges on steel cans increase their strength and durability.
• Common Knowledge; no source needed
Food cans need to be able to withstand the retort (heat sterilization) process where pressure inside the can builds. The added strength from the concentric ridges on the body of food cans also allows them to be stacked onto pallets more efficiently.