Brazil has declared the acai berry a national fruit, a move to stamp its ownership on the popular ¡°superfood¡± as concerns grow about foreign companies staking claims to the Amazon¡¯s biological riches.

Acai has been a savory staple in the Amazon for centuries, eaten as a thick paste alongside fish and manioc flour.

The dark purple berry went global in the early 2000s after it was reinvented as a sweet sorbet, often topped with granola and fruit, and marketed for its antioxidant-rich properties.