The açaí market is held at the foot of the fort. This small black fruit is renowned for being rich in vitamin B1, magnesium and iron. It is so nourishing that it is a staple of the inhabitants of the Amazon, who consume it as a juice or sorbet. Considered a natural anabolic steroid, more and more Brazilians are using it to hone the perfect body. From 5am, the market is a bustle of porters and traders whose every move can cause the world's açaí trading prices to fluctuate!