I was going threw my medical book today. I came across blood work from my flight physical. I was reading and came across some notes about high cholesterol. I was wondering are these number really that bad? Also what can I do to improve them. What are some the effects of having cholesterol problems?

My Overall Cholesterol was- 145 ng/dl
My Triglycerides are - 22 ng/dl low
HDL- 38 ng/dl low
LDL- 103 ng/dl high