Canned foods

Tinned food uses a more intense heat treatment that decreases the nutrients more than frozen food. But nutrients in different kinds of produce degrade at different rates.

• Foods with mostly water-soluble nutrients, including Vitamin C and B, are highly sensitive to heat and are better fresh.
• Foods with mostly fat-soluble nutrients, like vitamin E and A, faired much better during heat treatment. Foods include carrots and tomatoes.

Although canned foods result in greater nutrient loss, it can be stable for years.