The report in FoodNavigator seemed pretty boring at first sight:
EcoFlora has developed a natural, acid-stable blue coloring for foods, beverages and cosmetics and it says the creation of a sustainable supply chain differentiates it from other colors on the market.
But then I googled the plant involved (“edible jagua fruit, which grows in the Chocó rainforest” of Colombia). It turns out jagua is Genipa americana, which is cultivated for its edible fruit, but also has other traditional uses.
South American Indians bathe their legs in the clear liquid obtained from the fruit. The liquid has an astringent effect. When the liquid oxidizes, it stains the skin black. These stains are permanent, but only color the top few layers of skin, and thus disappear after about a fortnight, when the skin is naturally shed. As South Americans Indians went into battle, they used to paint themselves with Genipa juice and annatto.
The active compound is called genipin. Apparently, there’s been a “recent explosion in the popularity of Jagua body art.”
There’s nothing in the FoodNavigator piece about where the idea for this “natural, acid-stable blue coloring for foods, beverages and cosmetics” ultimately came from. However…
EcoFlora says it is committed to working with some of the poorest communities in the region to harvest the fruit in a manner which is environmentally sustainable and beneficial to the local economy.
Well, that’s something, I suppose.