Food safety
Does Hot Sauce Need Refrigeration After Opening?
A classic acidic commercial hot sauce can be very stable after opening; but “hot sauce” is too broad a category for one storage rule.
Articles by topic
Food safety
Food-safety guidance on handling, cooking, storage, spoilage signs and when food should be discarded.
Food safety
Does Mayonnaise Need Refrigeration After Opening?
Put simply: commercial mayonnaise should be refrigerated after opening.
Meat · Food safety
Can You Eat Wagyu Raw or Undercooked Safely?
In short: its genetics, price, and marbling do not remove microorganisms that can contaminate raw meat
Meat · Food safety
Rare, Medium-Rare, or Medium: What Is the Best Doneness for Wagyu?
Put simply: part of the eating experience depends on getting enough heat into the fat
Vegetables & mushrooms · Food safety
Frozen vegetables clumped into a solid block: what it says about the cold chain
A solid block of frozen vegetables can result from partial thawing and refreezing, but clumping alone cannot prove unsafe temperature abuse; ice crystals, package condition, and known temperature history matter more.
Dairy & cheese · Food safety
Ice cream with large ice crystals: why they form and whether it is safe to eat
Large ice crystals usually mean the ice cream warmed and refroze or was stored with temperature fluctuations, causing quality loss; soft or melted ice cream after a power failure should be discarded.
Food safety
Unopened food package swollen before opening: why that is a sign not to taste it
Unexpected swelling in a sealed food package can signal gas production, temperature abuse, or loss of package integrity; do not open or taste it to decide whether it is safe.
Seaweed, spices & more · Food safety
Leftovers with bubbles or gas when you open the container: when to throw them away
Unexpected bubbles, pressure, fizzing, or gas in ordinary refrigerated leftovers can signal fermentation or spoilage; unless the food is intentionally fermented, discard it rather than tasting or reheating it to test.
Food safety
Separated or watery mayonnaise: when it is a quality issue and when to discard it
Commercial mayonnaise can separate from freezing or emulsion breakdown without being spoiled, but an opened jar still needs refrigeration; mold, gas, off odor, contamination, or unsafe temperature history are reasons to discard it.
Food safety
Bulging canned food lid: why you should not open or taste it
A bulging can or jar lid is a serious warning sign of gas production, spoilage, or loss of container integrity; do not open it to smell or taste the food and do not try to salvage the contents.
Food safety
Rust on a food can: when it is superficial and when to discard it
Light surface rust that wipes off can be cosmetic, but heavy rust, pitting, holes, seam damage, leaks, or rust inside the opened can are reasons to discard the food.
Food safety
Dented can: which dents are cosmetic and which can be risky
A small shallow dent away from seams may be cosmetic, but deep dents, sharp creases, or damage on the top, bottom, or side seam can break the seal and are reasons to discard the can.