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How Long Does Jello Last? Jello - How long does Jello Last? An unopened box of Jello gelatin can last indefinitely, whereas prepared Jello will only last about a week. The shelf life of jello can vary due to the type, packaging, storage method, and thickening agent used. Jello is typically created by adding boiling water to a powdered mix or purchased in ready made serving containers.
Calories in sugar-free jello. *Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs. Some of these foods were entered by users and are subject to error.