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How does the caffeine content of Robusta compare with that of Arabica?
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Roasted coffee beans, ground coffee, and instant coffee in paper bags.
When comparing the two primary species of coffee plants, Coffea arabica and C. canephora (commonly known as Robusta), there is a significant difference in their chemical composition.
Robusta coffee contains twice the caffeine content of Arabica. Because of this higher concentration and its hardier nature, which makes it cheaper to produce, Robusta is frequently selected for use in inexpensive commercial coffee brands. In contrast, Arabica is generally prized for being a milder, more flavorful, and more aromatic brew, though it is a more delicate plant that requires specific growing conditions.123