To date, about 130 varieties of cranberries have been identified, some of which are dark red to black in color. Sweetened dried cranberries keep for a much longer time if they are stored properly.
From Wikipedia: “Dried cranberries are made by partially dehydrating fresh cranberries, a process similar to making grapes into raisins. They are popular in trail mix, salads, and breads, with cereals or eaten on their own. Dried cranberries are sometimes referred to as "craisins," though the word "Craisin" is a registered trademark of Ocean Spray Cranberries, Inc. and cannot be officially applied to dried cranberries from other manufacturers.
Most commercially produced dried cranberries contain added sugar. They may also be coated in very small quantities of vegetable oil to keep them from sticking together, and with sulfur as a preservative. Natural food stores tend not to use these additions.
Many home recipes for dried cranberries involve allowing the cranberries to sit overnight in a water and sugar solution, prior to freeze-drying or air-drying. This can deprive the cranberries of some natural nutrients that would be contained in fresh cranberries.”
“Dried cranberries can be used as an addition in various foods including salads, oatmeal, cookies, muffins, loaves, breads and trail mix. They can act as a direct replacement for raisins or any dried fruit. Because dried cranberries are a dried fruit, spoilage is less of a concern than for fresh fruit. Dried cranberries can be a useful product to carry while traveling because of their extended shelf life.
Dried cranberries are sometimes packaged with other flavorings. Dried cranberries can also come covered in chocolate.”
“Dried cranberries contain the same nutrients as fresh cranberries (notably dietary fiber and antioxidants). However, commercial drying processes substantially reduce the vitamin A and vitamin C content. The nutrient density is also reduced if sugar is added. ...
Dried cranberries contain no cholesterol, or saturated or trans fats. Consuming dried cranberries will supply very little amounts of an individual's daily requirement for vitamins and minerals. The most substantial daily amount supplied is the mineral manganese, at 5% of the daily recommended intake. Having 1/4 cup of dried cranberries will supply one serving of fruits and vegetables. The Canadian food guide recommends 7–10 servings of fruits and vegetables daily to reduce stroke, heart disease, and cancer risks. In Canada, Ocean Spray Craisins are given the Health Check symbol. This symbol is only given to food products that meet the registered dieticians' nutrient requirements. In Canada, Craisins are also considered to be a nut free product. However, the Trail Mix product includes nuts.”
“Cranberries with minimal processing contain the highest amount of antioxidants, although dried cranberries retain some antioxidants.
Some antioxidants include phenolic acids, flavonoids, proanthocyanidins, and anthocyanin. It is the anthocyanin that provides pigment to supply cranberries with their robust red color.
The added sugar can be a drawback for this product. Essentially, the sugar is added to improve texture and water content, and to reduce tartness.
Dried cranberries made with less sugar may be helpful for individuals with Type 2 Diabetes. Because less sugar is added, there is a lower glycemic index and thus less of an "insulinresponse" occurs. However, this has not been the case in recent studies of participants with higher response times on glycemic intake/glucose output testing batteries.”