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My colesterol is 240, which is apparently too high.
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That number means jack shit. How much of this is caused by a high or low triglyceride level? What is your LDL (low-density lipid) count, what is your HDL count? Until you get the exact results, 240 could be harmless...or it could be fatal.
Cholesterol is measured in mg/dl (milligrams per deciliter). If you have a fairly normal meal schedule (i.e. moderate, not low or high, cholesterol intake) but do a lot of physical activity, then you're just begging for a high cholesterol count. This is probably a good thing though - aerobic activity increases your HDL levels, the kind of lipids that help protect arterior walls. This count should be above 45 mg/dl, if I remember correctly. Your LDL, or "bad cholesterol" count should be below 155 mg/dl. Your TOTAL cholesterol count is 240 - which means that your HDL + LDL = 240 mg/dl. If you're running at, say, 150mg LDL and 90mg HDL, then you're just fine! This means that your foot intake is probably well managed, with a good exercise schedule.
Example? My Dad's cholesterol is 230'ish, mostly heriditary. However, he's been eating a lot of deer, chicken, and fish lately - so his LDL count is around 157mg...not bad. His physical activity has been exceeding mine, so HDL's comprise of the rest of his levels. I, on the other hand, have a cholesterol of 200. My problem? My HDL's are only around 60's, because I didn't do a lot of jogging or biking for a long period of time - so while I'm technically in "good shape", I'm really no better off than my father who is 30 points over me!
Case in point - because its so high, get a "lipid panel" test. Your doctor will tell you your LDL, HDL and triglyceride levels. It's the only way to know how you truly stand on the health level.