Canned Food Canned food is a food preservative added her Omoad colored or flavored food materials with a view to prolong life for a longer period. Saved damage food (canned): 1-that saved food (canned) containing an acidic substance to save the food mold of a cause severe or chronic inflammation in the stomach and lead to stomach ulcers.   2 - that this canning low fiber and contain significant calories and this causes cancer of the colon and rectum as these sodas contain high calories in a small amount of food which helps to eating large amounts of them leading to obesity or obesity in all multiplied like diabetes and the heart and blood vessels. 3-canning that lead to the formation of stones in the gallbladder also cause chronic constipation. 4. that the colored material and preservatives have many big damage some of them cause cancer and some of them cause a rash and some of them cause health problems. Methods of canned food preservation: 1. store cans saved: There are very useful to store canned goods in the dewy and dry places, especially if we want to storage for a long time and must monitor these tins from time to time, especially in summer. 2. Use of canning saved: That the duration of the contents of the can to keep open a very short there very useful to use it as soon as possible and save them in a cool place out of its case the original reservation until the next meal max. General tips for the consumer: 1. reduce and possibly avoid canned food and materials that contain colored materials, as well as abnormal industrial food. 2. Not a lot of soft drinks and beverages as well as of saved especially for children, such as juices that may cause tooth decay. 3-not a lot of processed potatoes in laboratories especially with regard to the clipboard oils harmfulness