Can you put on weight as you eat 20 green olives a day?

Yes, it is possible to gain weight by eating 20 green olives a day, depending on your overall diet and caloric intake. While olives are relatively low in calories, they are high in healthy fats, which can add up if not accounted for in your daily caloric balance. If the calories from the olives, combined with other foods you consume, exceed your daily energy expenditure, you may gain weight. Moderation and awareness of total calorie intake are key.