The 'Sell By' Ban: Comparing Food Shopping Under California's New 'BEST' vs. 'USE' Date Standard

The era of staring at a milk carton and wondering what 'Sell By July 7' actually means is officially over in the nation's largest grocery market. As of this month, California's AB 660 has taken full effect, banning consumer-facing 'sell by' dates on food packaging. The legislation forces a massive simplification of the grocery aisle, replacing decades of arbitrary phrasing with a strict two-tier system designed to separate food quality from food safety.[2]

For decades, shoppers navigated a chaotic landscape of more than 50 different date phrases, ranging from 'Enjoy By' to 'Display Until.' This inconsistency was not just annoying; it was incredibly expensive. The FDA and environmental groups estimate that consumer confusion over date labels causes roughly 20 percent of all household food waste, as shoppers routinely throw away perfectly safe food out of an abundance of caution.[2][3]

Under the new mandate, California requires manufacturers to use one of two standardized phrases: 'Best if Used By' to indicate peak quality, or 'Use By' to indicate a hard safety limit. The traditional 'Sell By' date, which was historically used purely for stock rotation by store clerks and never intended as a consumer safety metric, is now strictly prohibited from being visible to the public.[4]

The first category in this new framework is the 'Best if Used By' standard. This label is entirely about peak flavor, texture, and freshness. It explicitly tells consumers that the food does not magically expire or become toxic the moment the clock strikes midnight on that date. For shoppers, this standard is a green light to rely on their own sensory judgment—smell, sight, and taste—after the printed date has passed.[1][4]

The argument for the 'Best' standard is rooted in massive economic and environmental savings. ReFED data shows that standardizing quality dates reduces the premature disposal of shelf-stable goods by up to 30 percent. However, the argument against it is that it still requires a degree of consumer confidence; some shoppers remain intimidated by the prospect of evaluating a slightly older block of cheese or an unopened box of crackers without a strict numerical rule to follow.

The second category is the 'Use By' standard, which serves as a strict safety boundary. This label is reserved for highly perishable items where consuming them after the date poses a genuine microbiological health risk. When a shopper sees 'Use By' on a package of raw chicken or unpasteurized juice, it means the product must be consumed or frozen by that exact date, with no exceptions.[4]

The argument for the 'Use' standard is that it provides a definitive, science-backed safety net for high-risk foods. The Natural Resources Defense Council notes that clearly delineating these safety dates from quality dates significantly lowers the risk of accidental food poisoning. The argument against it is that it requires absolute strict adherence; consumers cannot rely on the 'sniff test' once a 'Use By' date has passed, because the bacteria that cause severe foodborne illness do not always produce a bad odor.[3]

For grocery stores, the transition has required a massive logistical overhaul behind the scenes. Without 'Sell By' dates printed on the consumer label, retailers can no longer rely on a quick visual scan to manage inventory rotation. Instead, supermarkets are shifting to scannable QR codes and internal barcode data, allowing employees to track shelf life digitally without confusing the customer.

The financial implications for households are substantial. The average American family throws away roughly $1,500 worth of uneaten food every year, much of it driven by label anxiety. By standardizing the language and removing the ambiguous 'Sell By' metric, California aims to keep edible food in the refrigerator and out of the landfill, directly lowering the effective cost of weekly groceries.[3]

Because California represents such a massive share of the United States grocery market, national food manufacturers are largely adopting the new labels nationwide rather than printing separate, bespoke packaging for a single state. This means the 'Sell By' ban, while technically a state law, is effectively becoming a de facto national standard, reshaping how the entire country shops for food.[1][2]

Ultimately, the 'Best if Used By' standard fits well when shopping for pantry staples, canned goods, hard cheeses, and snacks—items where a slight degradation in texture or flavor is the only consequence of aging. It does not fit when dealing with raw proteins, deli meats, or unpasteurized products, where quality degradation is indistinguishable from bacterial danger.[4]

Conversely, the 'Use By' standard fits well when purchasing those high-risk perishable items with strict microbiological limits. It does not fit for shelf-stable goods, where applying a strict safety date would lead to the exact kind of unnecessary waste and financial loss that this new legislation was designed to eliminate.[3][4]