Nestle’s announcement came after Greenpeace released a report on Wednesday which looked into how the company was sourcing palm oil.

Switzerland’s Nestle, which uses the edible oil in its food products such as KitKat bars, said it had replaced Sinar Mas with another supplier for further shipments after conducting its own investigations into its palm oil supply chain.

“We will continue to pressure our suppliers to eliminate any sources of palm oil which are related to rainforest destruction and to provide valid guarantees of traceability as quickly as possible,” Nestle said in a statement.

It added that it had only bought from Sinar Mas for manufacturing in Indonesia, and no palm oil bought from Sinar Mas had been used by Nestle for manufacturing in any other country.

Environmentalist group Greenpeace highlighted the practices of Nestle’s suppliers’ and their impact on rainforests, peatlands and the habitat of endangered orangutans in their report on Wednesday.

Anglo-Dutch Unilever, the world’s largest user of palm oil, said in December it had suspended purchases from Sinar Mas on similar concerns.

Greenpeace alleges that Sinar Mas, Indonesia’s biggest palm oil producer and the second biggest in the world, has been responsible for widespread deforestation and peatland clearance, practices which release vast amounts of carbon dioxide.