How to treat high blood lipids?

Diet/exercise & meds. High lipids (cholesterol) is treated with a low saturated fat, high fiber diet, cardiovascular exercise, and medications. Your doctor can make specific recommendations based on which lipids are elevated.
Diet/exercise+|-meds. Lipids with familial/genetic abnormalities are to be treated, on top off diet and exercise. You may eat cardboard for 3 months and still have issues. No question exercise and diet are the mainstay of treatment, but the earlier you start treatment if indeed a familial type lipid disorder, the bigger the difference in long term risks for stroke, heart attacks and overall blood vessel disease.
Statins. For elevated cholesterol. Fibrates, Lovaza or vascepa for elevated triglycerides. But the medications are after failed diet and exercise.