Which of the following is part of safe reheating practice?

• A. Reheat to 170°F for 5 seconds
• B. Reheat to 160°F for 30 seconds
• C. Reheat to 165°F for 15 seconds and reheat only once
• D. Reheat to 155°F for 15 seconds

Answer: (C)

Safe reheating means giving leftovers a heat treatment that reliably lowers harmful bacteria to safe levels. The standard target is reaching an internal temperature of 165°F and holding it for at least 15 seconds. This combination is enough to inactivate common foodborne pathogens that can be present in prepared foods.

Reheating only once is also part of safe practice because cycling foods through cooling and reheating creates opportunities for bacteria to grow between heats. Once the food has reached the safe temperature, keeping it there and serving it promptly minimizes the chance of regrowth.

The other scenarios don’t meet these protections: either the temperature is below 165°F, or the time isn’t long enough at the required temperature, so the heat treatment wouldn’t reliably kill pathogens.