"Possible protection" catalogue for HDL-Cholesterol?

My HDL-Cholesterol is more than 50, the laboratury result described it in " possible protection " range, what does it plan? is it good or bad ?
"apt cholesterol", or HDL-C. A high level of HDL-C seem to protect against cardiovascular diseases, and low HDL cholesterol levels (less than 40 mg/dL) increase the risk for heart disease. When measuring cholesterol, any contained surrounded by HDL particles is considered as protection to the body's cardiovascular health, within contrast to "bad" LDL cholesterol.

http://en.wikipedia.org/wiki/High_densit…

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