Except for Infant Formula, Food Dates Are About Quality, Not Safety — Here's How to Actually Tell If Food Is Safe to Eat

The short answer to the question most people bring to their kitchen shelf: with one exception, the dates printed on food packages tell you when a product is at its best, not when it becomes dangerous. That exception is infant formula, the only food category where federal law requires a date tied to nutrient content and safety. For everything else, safety depends on how the food was handled and stored — and on whether it shows signs of spoilage, according to the USDA's Food Safety and Inspection Service.

Beyond the Date: Understanding Food Quality vs. Safety

Walk down any grocery aisle and you'll see the familiar small print: "Best if Used By," "Sell By," a stamped date. Most shoppers read these as expiration deadlines and toss perfectly good food. The USDA's guidance flips that assumption. "Manufacturers provide dating to help consumers and retailers decide when food is of best quality," the agency explains, adding that "except for infant formula, dates are not an indicator of the product's safety and are not required by Federal law."

That distinction matters for both health and household budgets. Food waste driven by misunderstood labels is a real cost, and the USDA frames its dating guidance partly as a food-waste issue. The agency also notes that factors like how long and at what temperature a food was held during distribution, the food's own characteristics, and its packaging all affect how long it stays at optimum quality — which is why a date on one brand's product may differ from a nearly identical one beside it.

Your Food Safety Decision Framework

This matrix walks through the sequence of checks in order: identify the food type, interpret the label, verify handling, then inspect for spoilage. Follow it top to bottom for any item in your kitchen.

Food safety decision matrix: from printed date to eat-or-discard call
Step	Check	If yes	If no
1	Is it infant formula?	Discard if the "Use-By" date has passed — nutrients may have degraded; do not feed even if it appears fine	Go to step 2
2	Does the label say "Expires" or "Exp."?	Treat as a true expiration date and throw it away, per Foodshare's shelf-life guidance	Go to step 3
3	Was it handled and stored properly — refrigerated promptly, kept below 40 degrees F, not left out over two hours (one hour above 90 degrees F), defrosted safely?	Go to step 4	Discard — mishandled food can harbor multiplying pathogenic bacteria regardless of date
4	Any signs of spoilage: off smell, mold, slimy texture, color change?	Discard	The food should be safe to eat past its quality date, per USDA guidance

The framework's logic is that each step overrides the printed date. Formula ends the inquiry immediately; "Expires" labels end it next; mishandling ends it regardless of everything else; and only a food that clears all four checks earns an "eat" decision — even if its "Best By" date passed weeks ago.