Food is a type of raw material needed to keep the player characters in top shape. 

In the absence of Food at the base, Hunger effect   is applied, reducing their maximum health and Stamina stats for all characters in the player's group until the food again becomes available in the sufficient amount.

Food Rations can be found in the game world.

Food is slowly produced by the Farm facility at the base after being initialy charged with Food Rations.