Cockroaches are omnivorous, meaning that they eat a variety of different food items. Their favorite foods include meat and sweets. However, they will also eat other items such as paper, leather, and the glue on the back of stamps. In addition to these items, cockroaches also consume dead insects, human hair, and fingernails. When food is scarce, they often feed on each other. Some species can survive for over a month without food or water.
It is not known exactly how long a cockroach can survive without food. Although some species have been known to survive for months without food, many species will die after just a week. However, they do not survive as long without water. In addition, cockroaches are extremely sensitive to dehydration. If they go more than a week without food, they will quickly lose weight. If food is unavailable for a long time, cells will die at a much faster rate, and mitosis will slow down by up to 50%.
In addition to being cold-blooded, cockroaches will also reduce their activity levels when food is not available. They conserve energy by adjusting their body temperature to the temperature of their surroundings. When temperatures rise, they will become more active, while when temperatures drop, they will hibernate. In a way, a cockroach can live up to a month without food if it is properly prepared.