I would not use the word dangerous, but it is certainly well above normal. I believe it was not helpful for your doctor to brush you off with so Little explanation. Cardiac risk is produced by a number of different factors. Being male is a negative factor. Having raised BP is negative Being a smoker is negative Being diabetic is negative To convert mmoles/l to mgs/dl divide by 0.0259 so 6.6 = 266 mgs/dl and then feed the rest of your results into a cardiac risk calculator. http://hp2010.nhlbihin.net/atpiii/calculator.asp This will put things into perspective. Whatever the result it is worth trying to reduce your level. Decrease your animal fat intake, take more vigorous exercise + Benacol does help a bit. If you make these changes get the nurse to check another test after 6 months and again at a year. Prevention, even at 24, is better than cure.