 [ Symptoms ] does soy milk cause gynecomastia man boobs  my son is lactose intolerant and drinks a lot of soy milk as he is a growing teenager someone told him it was like estrogen and would give him man boobs is this true  thank you [ Disease ] nothing really causes poor hygiene per se it is a choice unfortunately your nephew can easily change but chooses not to you could have a heart to heart talk to him again but a decision to improve his hygiene habits may still be ignored if he had a significant other they may have the influence but as an aunt you can only do so much like any bad habits his lack of personal hygiene may be difficult to change unless he decides to do it