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Collagen supplements are marketed as a holy grail anti-aging product. Bovine collagen is made from cattle hides, and a new investigation from the Bureau of Investigative Journalism traced the supply chain of some collagen companies all the way to deforestation in the Brazilian Amazon.

Elisângela Mendonça is a London-based Brazilian journalist with the Bureau of Investigative Journalism. Her reporting pulls back the curtain on the dark side of the booming collagen industry.

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