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It sounds like you are either eating an extremely low-fat, high carbohydrate diet or suffering from Syndrome X (aka insulin resistance/metabolic syndrome).  Both of these drop healthy HDL and raise triglycerides leaving you susceptible to heart disease (even with normal LDL).   You need to adjust your diet to include less carbs and more healthy protein and good fats.  Nobody knows exactly what macronutrient percentages provide optimum health, but if you eat a 1/3rd good fat, 1/3rd good carbs, 1/3rd healthy protein it should improve your situation.  And eat plenty of fruits and vegetables.   Good Fats - Monounsaturated (raises HDL, decreases LDL) and Polyunsaturated Fats (lower both HDL and LDL).  Basically stay away from saturated fat (beef), egg yolk (cholesterol) and trans fat (fried food, anything partially rehydrogenated).  You need to have 20-30% of your calories from CANOLA OIL (MONO), WALNUTS (OMEGA-6's), and FISH(OMEGA-3's).  Additionally, omega-6 and omega-3 fats are essential fatty acids that can't be produced by the body and must be ingested from fish and nuts.   Good Carbs - These are unrefined grains like brown rice, oatmeal, barley, and beans.  White bread, pasta, and white rice have all the fiber and vitamins removed and should be avoided.   30-50% of your calories should come from good carbs (less puts you in ketosis and more raises your triglycerides because the liver converts excess glucose to triglycerides for fat storage).   Good Protein - These are proteins low in saturated fat like egg whites, chicken, fish, and tofu.  Pork and beef have tons of saturated fat and raise both HDL and LDL.  Fish are extremely important because they have long chain omega-3's and iodine.  20-30% of calories is about right.   The easiest way to do this is oatmeal with blueberries for breakfast, fruits/nuts between meals, and stir fried veggies with brown rice with some meat for dinner/lunch (cook only with canola oil, it is mostly monounsaturated and has the highest smoke point which limits conversion to trans fat by heat).   Also exercise often and get your bodyweight close to its ideal (21-23 body mass index BMI).   Look up Jack Lalanne.  He's the only one of the old fitness gurus that is still alive at 94 (Fix had a heart attack and Atkins died from CHF/obesity).  He has it right about protein, carbs, and fruits/vegetables.  However, keep in mind that his low fat diet isn't perfect and that the importance of good fats (mono and poly) is a recent medical discovery.