An international team of scientists has analysed in detail the functional properties of tubers and root vegetables traditionally grown in South America. The researchers also proposed new applications for these plants - they may prove useful not only in nutrition but also in cosmetics and medicine. Species such as yacón (Smallanthus sonchifolius), arrack (Arracacia xanthorrhiza), Pachyrhizus ahipa from the genus cloudberry and nasturtium tuberosum (Tropaeolum tuberosum) from the Andean plateaux are rich in starch and sugars, and poor in fat, provide significant amounts of vitamins and minerals, and are also a source of fibre and antioxidants.
The main objective of the research team, composed of scientists from Ecuador, Bolivia, Peru, Denmark and Spain, is to draw the attention of the international community to the unique characteristics of these exotic products and to encourage their wider use in the food industry. The experts stress that further research on the functional properties of the South American tubers is necessary - raising awareness of their beneficial health effects can not only contribute to the survival of the ancient culinary tradition but also improve the economic situation of local communities in the Andean regions.
Yacón has long been used as a remedy for kidney disease and digestive problems, and its consumption is also recommended for diabetics. Cancer, in turn, was used in the postpartum period and as a compress with antiseptic and anti-inflammatory properties, and is now used in the production of baby purées. Pachyrhizus ahipa, a sweet-tasting root, was an important remedy for respiratory and throat infections and was also used to prevent gastritis and kidney disease. Tuberous nasturtium, on the other hand, is known to have a positive effect on skin firmness, protective effect on the liver and kidneys, and prevention of prostate diseases.
Many factors contribute to the loss of biodiversity for many species originating in the Andean region. According to experts, an increase in the consumption of traditional tubers and root vegetables is necessary to ensure food security in the region and to preserve the genetic diversity of crops. Traditional agriculture is the basis for the existence of poor rural communities in western South America - increasing production and demand for food from the region can be the key to the survival of not only local crops but also the local population.