Dietary salad was a type of salad that facilitated weight loss.
In 2266, Yeoman Janice Rand brought Captain James T. Kirk dietary salad after Doctor Leonard McCoy changed his diet card because the captain had gained two pounds of body weight. She offered to get him something else, but Kirk instead asked her to bring some for McCoy. The doctor dodged the offer, saying he never ate before the rest of the crew did. (TOS: "The Corbomite Maneuver")