Had the same problem earlier this year had a reading of 6.8, after 3 months of dieting and losing 12 pounds I'm in the high 5's now. My blood pressure was a mess too I was at 150/100 now im at 129/70. Supplements that I am taking are Hawthorne Berry, garlic, cq10, fish oils and niacin. I am doing a hour walk at night 5-6 times a week and i've cut out all fast food and garbage.
Diet and cardio are number 1, if you are on heavy doses of anavar or winstrol that can fuck your lipid's too.