Cannibal Ferox (1981), directed by Umberto Lenzi and starring Giovanni Lombardo Radice and Lorraine De Selle, follows a group of travellers in the Amazon rainforest who encounter violent conflict with local tribes. The film presents a narrative built around an expedition into a remote environment.

Shameless Screen Entertainment

THE MOST VIOLENT FILM EVER MADE … BANNED IN 31 COUNTRIES!

A decade on from starting the cannibal genre, director Umberto Lenzi has the final word, pushing the vomit envelope beyond the sick with his utterly nasty, nihilistic apotheosis that is CANNIBAL FEROX. So unredeemable that its own makers denounced it as barbaric..!

An academic, Gloria (Lorraine De Selle), journeys to the Amazon jungle where things go awry when her party encounters sadistic druggy villain Mike (Giovanni Lombardo Radice aka John Morghen), as the travellers venture further into the heart of darkness, they soon discover what it means to be the hunted prey.

CANNIBAL FEROX aka ‘Make Them Die Slowly’, topped the official Video Nasty list for its raw graphic scenes of torture, mutilations, murder and cannibalism. This new 2K restoration additionally features new grading which revives, for the 1st time, the original edgy look of the 16mm film stock it was shot on – finally presenting the film as it was first created by director Umberto Lenzi, on location in the Amazonian green inferno.

Från IMDB:
Three friends embark on a trip through the Amazon jungle to disprove cannibalism, where they meet a pair of fugitive drug smugglers forcing a vicious cannibal tribe to harvest cocaine.