Also the healthy facts: 

• oleic acid – up to 77% of olives’ fat content is oleic acid, a monounsaturated fat. Studies show that replacing saturated fats with unsaturated fats can help maintain normal blood cholesterol levels.
• calories – there are about 150 kcal in every 100 gr of olives. That’s about 6 kcal per olives.
• iron – black olives are a particularly good source of iron, accounting for 45.5% of the recommended daily allowance.
• Vitamin E – table olives are a good source of vitamin E which helps protect cells from oxidative damage.
• no harmful fats – table olives are a saturated fat free food.
• olives are easy to digest – due to lignin/cellulose ratio which is lower than 0.5; eating seven olives a day is good for you and your body.