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Roasted Coffee Beans Offer Health Benefits Roasted coffee beans provide health benefits such as antioxidants and caffeine. The amount of coffee beans that you can consume without exceeding the safe caffeine levels varies from one person to the next. Consuming too many coffee beans can lead to negative effects such as stomach upset, heartburn and increased stool movements. The healthiest type of coffee is black coffee which doesn't have milk or sugar. However, even a cup of black coffee can