Grabbing a plum to snack on during the day is a sweet way to keep your cholesterol levels in check: The fruit contains anthocyanins — a.k.a. antioxidants — that help out your heart by lowering blood pressure and cholesterol. According to one study, eating three or more servings of anthocyanin-rich fruit each week can lower your heart attack risk by 34 percent.
Can my HDL be too high? It is well known that not all cholesterol is bad for you. Of HDL and LDL cholesterol, HDL packs some great benefits. This MNT Knowledge Center article examines when high HDL cholesterol is good, and whether higher is always better? Learn how to find the right balance along with some healthful ways to achieve high HDL. Read now
Stick to a Low-Carb Diet – Also known as a ketogenic diet, a low-carb diet can lead to several health benefits, including weight loss, reduced blood sugar levels, and, of course, an increase in your HDL cholesterol. This is great for those who suffer from diabetes, metabolic syndrome, or obesity, but in truth, anyone can benefit from this type of diet!
HDL particles are heterogeneous. They can be classified as a larger, less dense HDL2 or a smaller, denser HDL3.  Normally, most of the plasma HDL is found in HDL3.  To add to the complexity of HDL classification, HDL is composed of 4 apolipoproteins per particle. HDL may be composed of apo A-I and apo A-II or of apo A-I alone. HDL2 is usually made up only of apo A-I, while HDL3 contains a combination of apo A-I and apo A-II. HDL particles that are less dense than HDL2 are rich in apo E.
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. 
A study published in January 2016 in the journal Nutrients found that an antioxidant-rich diet raises HDL cholesterol levels in relation to triglycerides, and might be associated with a reduced risk of stroke, heart failure, and inflammatory biomarkers. Antioxidant-rich foods include dark chocolate, berries, avocado, nuts, kale, beets, and spinach.