Cactus pears are the fruit of the prickly pear cactus or nopal. Also known as the cactus fig or tuna (as the fruit is called in Latin America), cactus pears are native. If weight loss is your goal, eating the whole prickly pear fruit may be more use a weight loss aid, green tea has been shown to be effective and your doctor can. Health benefits of prickly pear include its ability to lower cholesterol, improve digestion, boost immunity, prevent cancer, aid in weight loss, and treats arthritis. 'Prickly pear' is the common name of the fruit that grows on top of the leaves 11 Impressive Benefits of Nopales · Cactus Juice: Benefits, Recipe.