Vegan Outreach has conducted a large randomized, prospective study examining diet changes three to five months after reading a variety of booklets promoting veganism and awareness of animal suffering.
We compared four booklets: Your Choice, Even If You Like Meat, Speciesism, and A Simple Way to Live (focused on chicken reduction).
Although few significant differences between booklets were observable in a population of this size (n=1,539), large, measurable decreases in animal consumption were readily seen.
The study also showed that people who newly avoid eating mammals due to reading the booklets are also likely to avoid eating chickens.
In this population, an average of one person adopted a mostly vegan diet (reducing their consumption of all non-vegan foods to less than once per week) for every 75 Vegan Outreach booklets read.