Seaweed, spices & more · Food safety
Does ketchup need refrigeration after opening?
Commercial ketchup is acidic and relatively stable, but refrigeration after opening is the best home routine for preserving color, flavor and quality.
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Legumes & soy · Food safety
Does soy sauce need refrigeration after opening?
Regular soy sauce is relatively stable after opening, but refrigeration preserves flavor. Less-sodium and blended sauces may specifically require refrigeration.
Meat · Food safety
How long does opened deli meat last, and when is it no longer safe?
FoodSafety.gov lists 3 to 5 refrigerated days for opened or deli-sliced luncheon meat. Package directions and handling conditions still come first.
Dairy & cheese · Food safety
Can butter stay out of the refrigerator?
Butter is more tolerant of brief room-temperature storage than many dairy foods, but refrigeration is the most predictable default, especially in a warm kitchen.
Dairy & cheese · Food safety
Can you freeze milk? Yes, but here is what changes
Milk can be frozen, but thawing may leave it separated or slightly grainy. Freeze it fresh, leave expansion space and thaw it in the refrigerator.
Fish & seafood · Nutrition & composition
Albacore vs light tuna: which usually contains more mercury?
Albacore usually contains more mercury than canned light tuna. Species and serving frequency matter most when tuna is a regular part of the diet.
Fruit · Cooking & food science
Why pineapple can make your tongue hurt, and how to prevent it
Fresh pineapple can sting because it is acidic and contains bromelain, a protein-digesting enzyme. Heat inactivates the enzyme, while smaller portions reduce exposure.
Fish & seafood · Nutrition & composition
Tilapia vs salmon: the biggest difference is not protein
Tilapia and salmon provide broadly similar amounts of protein per 100 grams cooked. Salmon stands out far more for long-chain omega-3 fats and vitamin D, while tilapia is leaner and lower in calories.
Fish & seafood · Nutrition & composition
Cod vs tilapia: which has more protein and fewer calories?
Cooked tilapia usually has a little more protein per 100 grams, while cooked cod is generally lower in calories and fat. Both are very lean, high-protein fish.
Fruit · Nutrition concepts
Is coconut a fruit, a nut, or a seed?
A coconut is botanically a drupe, a type of fruit. It contains one large seed, while in cooking it is often grouped with nuts because of how the flesh is used.
Fruit · Comparisons
Mandarin vs clementine: how to tell them apart and what changes
A clementine is a type of mandarin. Clementines are usually small, sweet, easy to peel, and low in seeds, while “mandarin” covers a much broader group of citrus.
Fruit · Nutrition & composition
Can you eat kiwi skin? Here is what it adds
Yes. Kiwi skin is edible when the fruit is sound and washed under running water. Leaving it on adds fiber and lets you eat more of the fruit, though peeling is also perfectly fine.