The Impossible Whopper Estrogen meme originated in late 2019 following an article that claimed Burger King's plant-based burger contained 18 million times more estrogen than a regular Whopper. While the claim conflated plant-based phytoestrogen with human estrogen, the internet immediately ran with the idea that eating the burger would cause rapid feminization. It became a viral trope often used to joke about 'soy boys' or unexpected physical transformations. Today, the meme is used both by critics of plant-based meat and by the trans community as a self-aware, ironic joke about the burger's supposed 'HRT' properties.