Food-safety guidance on handling, cooking, storage, spoilage signs and when food should be discarded.
Most olives picked from the tree are too bitter to enjoy because of oleuropein and other phenolic compounds. Curing is not simply a way to add salt: brine, fermentation, water or alkaline treatments remove or transform much of the bitterness and create a stable table olive. Depending on the style, processing can take from days to many months.
You do not need vinegar or baking soda for routine fruit and vegetable washing. Potable running water and friction are the basics. Some solutions can reduce particular residues under specific conditions, but they do not sterilize produce or work equally on every food.
Rinse fruits and vegetables under potable running water while rubbing the surface, and use a clean brush on firm produce. Wash even before peeling. Washing reduces microbes but does not sterilize food, and dish soap should not be used on produce.
Cooking rice, potatoes or pasta gelatinizes starch; cooling lets some starch chains reorganize into type 3 resistant starch. The increase is real but varies widely with the food, variety, cooking, time, temperature and laboratory method. In one study, white rice rose from 0.64 to 1.65 g of resistant starch per 100 g after 24 hours at 39°F (4°C) and reheating. The potential benefit is not a reason to leave food at room temperature: cool and refrigerate it under normal leftover-safety rules.
Tightly sealed honey is one of the most shelf-stable foods in the pantry: high sugar, low available water and acidity make growth difficult for many microorganisms. That does not make a jar indestructible. Honey can crystallize, darken or lose aroma over time, and added moisture or contamination can allow fermentation. A best-by date is mainly about expected quality, not a switch that makes honey unsafe the next day.
For cooked sliced ham or luncheon meat, a conservative refrigerator window is about 3–5 days after opening at 40 °F (4 °C) or below. Dry-cured ham such as Serrano can have a different storage window, so the package's after-opening instructions matter most.
A slightly soft or wrinkled potato may simply have lost water during storage and is not automatically spoiled. If it is very limp, wet, slimy, foul-smelling, extensively rotten, heavily green or bitter, discarding it is the better choice.
Black areas that develop on shrimp shells, heads or legs are often melanosis, an enzymatic browning process that occurs after harvest. Melanosis mainly affects appearance and does not by itself prove spoilage, but it also cannot certify that shrimp are fresh or safe.
Spoiled Serrano ham may develop a persistent sour, rotten or strongly rancid odor, slimy texture or abnormal mold, especially in sliced packaged ham. Surface darkening, yellowing fat or small hard white crystals can occur through oxidation or curing and are not enough by themselves to diagnose spoilage.
No. USDA says consumers should not wash commercially packaged eggs before storing or using them. U.S. graded eggs have already been washed and sanitized under controlled processing conditions and are kept refrigerated. Rewashing at home is unnecessary and can increase contamination risk if wash water is drawn through shell pores or extra handling cracks the shell.
Opened mozzarella has no single storage time because fresh mozzarella packed in liquid and low-moisture pizza mozzarella are different products. For fresh mozzarella, follow the package's “use within X days of opening” direction and think of roughly 3–5 days as a common practical window; USDA's broader soft-cheese guidance is about a week. Low-moisture mozzarella can last longer, but the specific manufacturer instruction should take priority.
On cartons bearing the USDA grade shield, the three-digit pack date runs from 001 for January 1 to 365 for December 31. If a sell-by or expiration date is used, it may be no more than 30 days after packing; “use by,” “use before” or “best before” quality dating may extend to 45 days including the pack date. These dates do not replace refrigeration: USDA gives shell eggs about 3–5 weeks refrigerated.