Frozen lunches and dinners may claim to be healthy on the packaging, but most are highly processed and unhealthy. "One of the most popular brands of frozen meals provides an average 64 grams of fat and 1,020 calories per meal, which is more fat than most of us should have in an entire day," says Ficek. "And although there are diet frozen meals out there, often they are heavily processed and loaded with sodium and preservatives."