Scientists have discovered that the iron in red meat causes heart attacks in men. <citation needed> Women apparently are not at risk <citation needed> since they need extra iron.<faulty reasoning. They could require extra iron AND be at risk> So, if you are a guy and you eat too much red meat, you risk a heart attack.<citation needed> If , for example, you examine the ingredients in multi-vitamins designed for men, you will see that they do not contain iron. <because men tend to get their RDA of iron without supplements. Women, on the other hand and as you yourself mentioned, need extra iron and are not as likely to get their RDA of iron without supplements. ...Conversely, it's because iron in supplements will kill you dead, the vitamin companies know this and keep it out of "male" supplements, but they are afraid of the meat industry mafia so will not say anything about it!> But this information is not widely known.<errrr, about supplements? it is, actually> Perhaps the meat industry does not want this information known and has taken steps to suppress this information.