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Roasted Coffee Beans Offer Health Benefits Roasted coffee beans are rich in antioxidants and caffeine. However the amount of coffee beans you can consume without exceeding safe levels of caffeine is different for each person. Consuming too much coffee beans can cause side effects like heartburn, stomach upset and increased bowel movements. Black coffee is the most healthy coffee since it doesn't contain any milk or sugar. However, even a cup of black coffee can have high amounts of calories. High in an