US demand is growing for a Brazilian fruit marketers claim has 10 times the antioxidants of grapes.

The Acai berry has already had the seal of approval from Oprah, with her website listing it as one of the “Top 10 Super Foods” and NBC presenter Matt Lauer called it the “Amazon’s Viagra”.

The fruit itself is described as having a unique taste with a hint of grape.

Producers claim that with 10 times the antioxidants of grapes and twice the antioxidants of blueberries, the Brazilian Acai berry is considered to have the best nutritional value of any fruit on earth.

Health companies are now paying attention to the berry, with Monarch Health Sciences recently launching an Acai-based super food drink called MonaVie.