Hello, I'm an expert in the field of food preservation and safety. When it comes to jam, the shelf life can vary depending on several factors such as the type of fruit used, the sugar content, the method of canning, and the storage conditions.

Unopened commercial jars of jam can last for up to a year or more past their expiration date. Once opened, they should be stored in the refrigerator and consumed within 3 to 4 weeks to ensure freshness and safety.

Homemade jam, on the other hand, typically has a shorter shelf life. If stored in a cool, dark place like a pantry, it can last up to a year. However, if it's stored in the refrigerator, it can last longer, potentially up to two years. It's important to check for signs of spoilage such as mold or an off smell before consuming.

Remember, the red color of the jam can fade over time, but this doesn't necessarily mean the jam has spoiled. Always use your senses of sight, smell, and taste to determine if it's still good to eat.

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For homemade jams made using sugar and processed by canning in a hot water bath, you can expect to get about two years of shelf life when stored in a cool, dry place. Once opened, keep your homemade jam in the refrigerator for up to three months.read more >>