What the Health
As part of his animal rights activism, Phoenix produced the popular, yet controversial, Netflix documentary What the Health. The film engages with the benefits of veganism, encouraging a vegan lifestyle while examining the harm of consuming processed meats.
His strict vegan lifestyle also invades his professional life: Phoenix refuses to wear costumes made of real leather, and so for his roles in Gladiator, Quills and Walk the Line, he requested that his costumes would be made from synthetic materials, and so it was.