Food-safety guidance on handling, cooking, storage, spoilage signs and when food should be discarded.
A home refrigerator should stay at 40 °F (4 °C) or below. A practical target is roughly 37–40 °F (3–4 °C), cold enough to slow microbial growth while avoiding accidental freezing of most foods. The number on the control dial often represents cooling power rather than an exact temperature, so an appliance thermometer is the best check.
Protein powder does not stay unchanged forever, but a passed quality date does not automatically make a dry powder unsafe the next day. FDA treats “Best if Used By” as a quality-oriented phrase for most packaged foods. Heat, moisture, and oxygen accelerate flavor, color, solubility, and protein changes. Visible moisture, mold, pests, rancid odor, or a compromised package are reasons to discard it.
Once protein powder is mixed with liquid, it no longer behaves like a dry shelf-stable product. A shake containing milk, plant milk, yogurt, or fruit should be treated as perishable: keep it at 40 °F (4 °C) or below, do not leave it out for more than 2 hours, and for best quality use it within about 24–48 hours. There is no official one-size-fits-all shelf life for homemade protein shakes.
For whole cuts of beef, pork, veal, and lamb, USDA recommends 145°F (62.8°C) followed by at least a 3-minute rest. Ground meat from these species should reach 160°F (71.1°C). Grinding changes the safety target because surface contamination can be redistributed through the interior.
There is no quick cure for a hangover: the body needs time to metabolize alcohol byproducts, rehydrate, and recover. Water, tolerable foods, and rest may ease individual symptoms, but they do not erase the hangover. Coffee, cold showers, or more alcohol do not speed recovery.
Sulfites are used to slow oxidation, browning, and selected deterioration processes. In the EU, sulfur dioxide and sulfites are declared above 10 mg/kg or 10 mg/L as total SO₂ because a minority of sensitive people, particularly some with asthma, can react.
Chicken is considered safely cooked when all parts reach at least 165°F (74°C). For breasts, thighs, and wings, measure the thickest area without touching bone; for a whole chicken, check the breast, innermost thigh, and innermost wing.
A controlled home-yogurt process heats milk to about 185–200°F, cools it to roughly 112–115°F, adds an active yogurt culture, incubates near 110°F for several hours, and refrigerates once the yogurt has set and acidified sufficiently.
For a large egg lowered into already-boiling water and kept at a gentle simmer, about 6 minutes gives a runny yolk, 7–8 minutes gives a jammy center, and roughly 10 minutes gives a firm yolk. These are culinary timing guides; a cold or extra-large egg may need adjustment.
A pasteurized egg has received a validated treatment designed to destroy viable Salmonella. It can still look raw and behave similarly in recipes, but it adds a safety barrier for dishes that do not fully cook the egg.
Microwaving water is common, but there is an uncommon hazard: water can rise above its normal boiling point without obvious bubbles. Moving the cup or adding coffee or sugar can then trigger sudden boiling and eject extremely hot water.
As a general rule, do not put a sheet or container of aluminum foil in a microwave unless the instructions specifically allow it. Metal reflects microwave energy, and wrinkles or sharp edges can concentrate the electric field and cause arcing. USDA allows small smooth shields in limited situations.