Olives do contain a significant amount of fat. The type of fat that olives contain, however, is not unhealthy. Olives contain monounsaturated fat, which is considered a "good" fat.
Olives are technically a fruit. 135 grams of olives, which is equivalent to one cup, provides 155 calories. Of those 155 calories, roughly 130 are from fat. Saturated fats make up about 17 calories of those fats. The monounsaturated fats make up most of the fat content in olives. Despite their relatively high fat content, olives are still considered a healthy food to eat. Monounsaturated fats help reduce levels of bad cholesterol in the body. These fats are also beneficial to the heart and may help to reduce the risk of heart disease. Monounsaturated fats also help to provide a sensation of fullness, causing people to eat less and feel full longer. When eaten in large amounts, olives are less healthy; they contain high amounts of sodium. However, when eaten in moderation as a snack or in salads, olives offer high nutritional benefits coupled with healthy fats. Olives are high in antioxidants and Vitamin E. Olives also provide a significant amount of Vitamin A and are a significant source of iron, copper and fiber.