Coffee bean such fatty acids – 3-methyl-valeric acid (sour, green-herbaceous, unpleasant odor), acetaldehyde (pungent-nauseating odor, even when highly diluted, present in dried green coffee beans at concentrations of about 5 mg/kg), propanal (choking effect on respiratory system, penetrating-nauseating), butanal (nauseating effect, present in dried green coffee beans at 2 to 7 mg/kg), or pentanal (very repulsive nauseating effect). Coffee bean A coffee bean is a seed of the coffee plant and the source for coffee. It is the pit inside the red or purple fruit often referred to as a cherry. Just like ordinary cherries, the coffee fruit is also a so-called
Berry practice has come under scrutiny in the past years because of the low wages and poor living standard for the "berry-pickers", as well as the lack of worker safety. Once ripened, berries are typically of a contrasting color to their background (often of green leaves), making them visible and attractive to frugivorous animals and birds. This assists the wide dispersal of the plants' seeds. Berry colors are due to natural plant pigments, such as anthocyanins, together with other flavonoids localized mainly in berry skins, seeds and leaves. Although berry pigments have antioxidant properties "in vitro", there is insufficient physiological evidence