Packham, who is currently taking part in Veganuary - and is an ambassador for the initiative - is concerned about the devastating effects factory farming is having on farm animals, wildlife and the environment.
As a result, he has become the latest patron to join leading farm animal welfare charity Compassion in World Farming (CIWF). As part of his new role, he's spoken out, calling on people to learn more about animal agriculture and change the way they eat.
Speaking about Packham's new role, CIWF CEO, Philip Lymbery, said: "Chris is a wonderful advocate to have on board. We look forward to him supporting our fight to end factory farming."
Vegan or flexitarian
"There's an old expression 'you are what you eat'. I think we need to change it to 'what you eat says who you are' because now each and every one of our diets needs a critical rethink," Packham said in a statement sent to Plant Based News.
"From our health perspective, from the point of animal welfare, to the impact farming has on wildlife and to the way that our food choices shape the environment of the entire planet. Thinking about eating no, less or better quality meat or dairy needs to be on our agenda. As does a better understanding of the way modern farming practices are shaping our world and how we can work together with farmers to improve these for everything and everyone’s benefit.
"Young people in particular need to re-connect to the nature of food and learn the true cost of its production and food labeling, so we can make informed choices must be significantly improved. All this is why I am pleased to be a Patron for CIWF, a body calling for reforms based on science, best practice, and compassion."