Roasted coffee is a sturdy species of coffee bean with higher acidity and high bitterness; it is used primarily in instant coffee,espresso, and as a filler in ground coffee blends. The bean comes from the Coffea robusta variety of the Coffea canephoraplant (widely known itself by the synonym Coffea robusta) which has its origins in central and western sub-Saharan Africa.Robusta is easy to care for, has a greater crop yield, has almost double the amount of caffeine and more antioxidants,and is less susceptible to disease than arabica coffea. Roasted robusta beans produce a strong, full-bodied coffee with a distinctive, earthy flavour, but usually with more bitterness than arabica due to its high pyrazine content.

About 30% of the coffee produced in the world is robusta. It is mostly grown in Vietnam, where French colonists introduced it in the late 19th century, though it is also grown in Africa and Brazil, where it is often called conilon.In recent years, Vietnam, which produces mostly robusta, has surpassed Brazil, India, andIndonesia to become the world’s single largest exporter of robusta coffee. Brazil is still the biggest producer of coffee in the world, producing one-third of the world’s coffee, though 70% of that is C. arabica.

Roasted Robusta coffee bean
Roasted Robusta coffee bean

Robusta is easier to care for and has a greater crop yield than C. arabica, so is cheaper to produce.Roasted robusta beans produce a strong, full-bodied coffee with a distinctive, earthy flavour, but usually with more bitterness than arabica due to its pyrazine content.Since arabica beans are believed to have smoother taste with less acidity and a richer flavour, they are often considered superior, while the harsher robusta beans are mostly used as a filler in lower-grade coffee blends.However, the powerful flavour can be desirable in a blend to give it perceived “strength” and “finish”, noticeably in Italian coffee culture. Good-quality robusta beans are used in traditional Italian espresso blends, at about 10-15%, to provide a full-bodied taste and a better foam head (known as crema). It is also used as a stimulant, diuretic, antioxidant, and antipyretic, and relieves spasmodic asthma

Robusta is a species of flowering plant in the family Rubiaceae. Though widely known by the synonym Coffea robusta, the plant is currently scientifically identified as Coffea canephora, which has two main varieties, C. c. robusta and C. c. nganda.The plant has a shallow root system and grows as a robust tree or shrub to about 10 m tall. It flowers irregularly, taking about 10–11 months for cherries to ripen, producing oval-shaped beans. The robusta plant has a greater crop yield than that of arabica, and contains more caffeine – 2.7% compared to arabica’s 1.5%. As it is less susceptible to pests and disease,[15] robusta needs much less herbicide and pesticide than arabica.

Originating in upland forests in Ethiopia, robusta grows indigenously in Western and Central Africa from Liberia to Tanzania and south to Angola. It was not recognized as a species of Coffea until 1897, over 100 years after Coffea arabica. It is also reportedly naturalized in Borneo, French Polynesia, Costa Rica,Nicaragua, Jamaica, and the Lesser Antilles.

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