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In recent years, world production has increased further from 90m bags to 100m bags, and Coffea robusta accounts for around 40% of this.
Coffea robusta has a high concentration of chlorgenic acid (which reduces redness associated with excessive sunlight exposure) and caffeine (which limits photodamage, decreases skin roughness and wrinkle formation, and reduces the appearance of crow's feet).
Tea and cranberry juice are known to have this antiadhesive effect, so Italian researchers analyzed green and roasted versions of Coffea arabica and Coffea robusta, commercial coffee samples, and caffeine and other coffee components.
African beans of the species Coffea robusta were slightly more effective than South American beans of Coffea arabica.
The Coffea Robusta originates in the lowland equatorial climates of Africa with temperatures varying little beyond 24-26[degrees]C, at least 2000-mm of rainfall spread over most of the year and air humidity approaching saturation.