evidence: Now let me refresh your metric system. There are 1 million nanograms (ng) in one milligram (mg). That means an Impossible Whopper has 18 million times as much estrogen as a regular Whopper. Just six glasses of soy milk per day has enough estrogen to grow boobs on a male. That’s the equivalent of eating four impossible whoppers per day. This claim originated from a news article published in the Tri-State Livestock News on 20 Dec. 2019. Written by doctor of veterinary medicine James Stanger, the article has received more than 4,900 engagements on Facebook, while the claim has circulated in memes which have been viewed more than 10 million times to date. The claim states that the "Impossible Whopper has 44 mg of estrogen and the Whopper has 2.5 ng of estrogen", and suggests that eating Impossible Whoppers would cause men to grow breasts. Scientists who evaluated this claim found it to be inaccurate. They explained that estrogen is a hormone produced in mammals, and therefore cannot be found in plant products such as soy-based meat substitutes used in the Impossible Whopper. While plants do contain compounds similar to estrogen—called phytoestrogens, among which are certain isoflavones—which are capable of binding to estrogen receptors in humans, phytoestrogens do not possess the same level of biological activity as estrogen does.