Shelf Life How Long is Too Long?. U.S.U. Extension Food Quality & Entrepreneurship Karin Allen, Ph.D. FACS Nutrition & Food Science Conference June 11, 2012. Sell By? Use By? Best By?. No Federal requirement for product dating except infant formula
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U.S.U. Extension Food Quality & Entrepreneurship
Karin Allen, Ph.D.
FACS Nutrition & Food Science Conference
June 11, 2012
When is a food spoiled?
Many are not given a sell or use by date
Visual spoilage is commonly used as guideline. For example, if bagged salad still looks fresh, it will be safe to eat as long as it has been refrigerated.
Crackers still in the overwrap have a much longer shelf life. If they smell ok, they’ll taste ok.
Drier cookies have a longer quality shelf life than moist cookies.
Repackaging cookies & crackers doesn’t work unless you back-flush with nitrogen or vacuum package.
Oils in peanut butter will oxidize after jar is opened. If it smells rancid, it is best to discard it.
Oiliness on surface is not a safety issue. It can be mixed back in and used.
“Sliminess” or mold – throw away entire container.