Food-safety guidance on handling, cooking, storage, spoilage signs and when food should be discarded.
Many lower-sodium salt substitutes use potassium chloride in place of some sodium chloride. They can reduce sodium intake, but they may taste more bitter or metallic and are not appropriate for everyone, especially people with impaired potassium excretion.
Nitrates and nitrites are curing agents, not decorative additives. Nitrite helps suppress C. botulinum, develops the characteristic pink cured color and flavor, and slows rancidity. Their use is limited because nitrite chemistry can also form nitrosamines under some conditions.
Gluten is found in wheat, barley, rye, and their related varieties or derivatives. Rice, corn, potatoes, quinoa, beans, fruits, vegetables, plain meat, fish, eggs, and dairy are naturally gluten-free, but processed foods can add gluten ingredients or cross-contact.
Oats do not naturally contain the gluten proteins found in wheat, rye, and barley. The practical problem is cross-contact during growing, transport, milling, and packaging. People with celiac disease should choose oats that meet gluten-free requirements rather than assuming every bag of oats is safe.
Used frying oil can be reused, but not indefinitely. Its useful life depends on temperature, food debris, moisture, the oil itself, and storage. Straining and cool, sealed storage help; foaming, rancid odor, heavy darkening, or abnormal smoking are reasons to discard it.
A ripe pear should be tender, but the flesh around its core should not become a watery or brown mass. If that area collapses, leaks, smells fermented, or has mold, the pear has moved beyond useful ripeness and should be discarded.
A pear can begin browning around the core after it has ripened too far or exceeded its useful storage life. A small firm-to-soft brown area may reflect overripeness, but watery, collapsing, moldy, or fermented-smelling tissue is a reason to discard the fruit.
An apple can develop brown flesh inside without any bruise showing on the skin. Internal browning can result from maturity and storage conditions; if the brown tissue is wet, mushy, moldy, or fermented-smelling, it should no longer be treated as a simple quality defect.
An apple can develop mold in the seed cavity while its skin still looks firm and healthy. If cutting the fruit reveals fuzzy or powdery fungal growth in the core, discard the whole apple rather than simply scooping out the seeds and eating around it.
A small black spot that is dry and superficial can sometimes be trimmed away if the radish is firm and the flesh directly underneath is clean. If the lesion is sunken, wet, soft, spreading inward, moldy, or foul-smelling, discard the radish.
Firm, glassy, water-soaked-looking flesh around an apple core can be watercore, a maturity-related physiological disorder. It is not rot by itself, although severe watercore shortens storage life and can progress to internal browning and breakdown.
An artichoke that turns brown or nearly black shortly after cutting is usually undergoing enzymatic browning where the flesh meets air. If it was firm and sound before cutting, the quick surface color change does not mean it suddenly spoiled.