For this reason, you should always put a coin in your freezer

Foods That Must Always Be Thrown After Thawing

Some foods aren’t safe to consume if they thawed and were then frozen again. Meats, poultry, fish, and dairy are particularly susceptible to bacterial multiplication. Once you feel that coin has disappeared into the ice, it is better to err on the side of caution and just discard those higher-risk foods.

In addition to perishable foods, leftovers and homemade meals should be discarded if you think they thawed. The changes in texture and taste may not be noticeable, but the risk of contamination is real.