evidence: Will the estrogen in an Impossible Burger grow man boobs? The answer will surprise you! But this whole debate is representative of some serious problems we have with nutrition and health claims. [...] The graphic compares a beef hamburger’s estrogen level to that of the new Impossible Burger. And then states that it is so much estrogen that four burgers a day would cause "male breast growth." [...] So we can see that the actual base of the argument is factual. There is quite a bit more estrogen-like compounds in the Impossible Burger than in the beef hamburger. But now let’s look at the second half of the claim.