This level of 120 is high but not alarming
can cause high levels of SGPT,there could be other reasons for high levels of SGPT like
Consumtion of pain killers or herbal medicines
Just take care of your diet by avoiding alcohol and fatty foods along with avoiding sweets and junk foods.
Get your SGPT levels checked up again after 4 weeks and if they are still high you must consult a Gastroenterologist
and get investigated properly to look for the cause of high SGPT.