Green, leafy vegetables, esp. kale, collards, swiss chard are a few vegetables which help. Fiber in apples (pectin) may reduce LDL levels. It is VERY important to eliminate all forms of sugar for a few weeks, reintroduce (ONLY one for a month or so) a slightly sweet food, and switch different types of sweet foods to see which sweet food is more tolerable.
There is considerable controversy over whether high cholesterol is in itself a cause of heart disease (the lipid hypothesis), or a symptom of an inflammatory condition that is the true cause of heart disease (the inflammation hypothesis). According to the latter theory, chronically high levels of inflammation creates small lesions on arterial walls; the body sends LDL to heal those lesions, but it ultimately accumulates and oxidizes, causing blockages. From this perspective, the best lifestyle approach to lower cardiovascular disease risk is to lower inflammation in the body rather than LDL levels.
While cholesterol is normally kept in balance, an unhealthy diet high in hydrogenated fats and refined carbohydrates can disrupt this delicate balance, leading to increased cholesterol levels. This imbalance is manifested in elevated LDL (bad cholesterol) and low HDL (good cholesterol), which increases the risk of heart attack or stroke. Other causes can include physical inactivity, diabetes, stress and hypothyroidism.
What is cholesterol ratio and why is it important? There are two types of cholesterol. One is harmful, and builds up in the arteries, but the other can actually benefit the body. In this MNT Knowledge Center article, learn about the difference between 'good' and 'bad' cholesterol. How do they affect the body? How can you manage high cholesterol? Read now
A study of over 1 million US veterans showed a U-shaped relationship between HDL and total mortality, with 50mg/dL as the level associated with the lowest mortality. [7, 2] In addition, an analysis of the Framingham study demonstrated that LDL and triglyceride levels modify HDL’s predictive value; CHD risk was found to be higher when low HDL was combined with high LDL and/or triglycerides as compared with the presence of low HDL levels alone. [8, 2] The relationship between HDL and CHD risk is also confounded by the presence of pro-atherogenic and inflammatory markers. 
Obesity results not only in increased LDL cholesterol but also in reduced HDL cholesterol. If you are overweight, reducing your weight should increase your HDL levels. This is especially important if your excess weight is stored in your abdominal area; your waist-to-hip ratio is particularly important in determining whether you ought to concentrate on weight loss.
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Remember, some of the best ways to raise HDL cholesterol levels while simultaneously lowering LDL cholesterol include not smoking, exercising more, decreasing body weight, eating healthier fats, reducing refined carb intake, keeping alcohol consumption moderate, increasing niacin intake and watching your prescription drug use. Do these things and watch your HDL go up while your risk for heart disease and stroke goes down.
And according to some powerful experiments by software engineer-turned-biohacker Dave Feldman, you can actually increase and decrease your cholesterol at will. It all depends on how much fat you eat — and, directly against mainstream dietary knowledge, the correlation is inverted. In other words, eating more fat will actually lower your cholesterol.