Hello Your daughter is having high cholesterol 220 mg /dl . You didn t mentioned the lipid profile as sometimes we have seen that HDL ( good cholesterol ) is high , while LDL( bad cholesterol ) is low . Also didn t mention VLDL & TRIGLYCERIDE values. As you mentioned that there is a risk on both maternal and paternal side . The age of patient is very young , risky on both side. You should be worried but not too much. Your daughter s cholesterol is not that high to be very worried . Your daughter may easily get back normal range. I see similar cases amongst young peoples who visit my clinic . In the first meeting , I advise my patient to go life style modifications for 3 months. I retest them again after 3 months & if they continue to be in high range I advise them to take medicine. 1 High fiber diet , green leafy vegetable fruits . 2 Cut down the processed food , white bread , doughnuts , white sugar pizza should be completely avoided. 3 A 40 minute physical activities every day morning walk or evening walk ora visit to a gym or swimming pool. Due to high risk ( in both families ) , this is a concerning . Your daughter need to investigated with E K G & echocardiogram to isolate the case. I would recommend your daughter to consult a cardiologist and get his opinion. In your daughter case must consult cardiologist every years for just safety. Good luck.