Olives are a staple of the Mediterranean diet and have many health benefits including improved heart health. Read more here https://authoritynutrition.com/foods/olives/#Health_Benefits
Olives are very easy to incorporate into the diet, and make a great addition to a healthy, real food-based diet. They are on the green list for an LCHF lifestyle http://realmealrevolution.com/real-food-lists#green
They make a prefect snack or picnic food and are delicious hot or cold. These olives shown contain 20% healthy fats, 1% carbs.