Question: when does stefan stop drinking human blood in season 1

title: Stefan Salvatore
text: Stefan and Elena begin a relationship and he revealed to her that he is a vampire . However , Damon returns to Mystic Falls , too , and also falls in love with Elena . Further on in the series , Damon and Stefan start to bond as brothers again and it becomes apparent that they do love each other . Because of his addiction to human blood , Stefan only drank animal blood in the beginning of the series , which made him weaker than other vampires . In season two , Stefan starts to take small amounts of Elena 's blood each day to mitigate its effect on him and to increase his strength . When Katherine returns it is discovered that she had always loved Stefan and not Damon ; however , Stefan is in love with Elena and not interested in Katherine . Stefan starts to build a friendship with Caroline Forbes after she is turned into a vampire . After Klaus gives Stefan his blood to save Damon from a werewolf bite , he turns Stefan into a Ripper again . 

Answer: answer: Stefan and Elena begin a relationship and he revealed to her that he is a vampire. Because of his addiction to human blood, Stefan only drank animal blood in the beginning of the series.