““According to the American Heart Association, optimal levels are as follows (note: those levels have been converted from US mg/dL measures): Total cholesterol (3.7–5.1 mmol/L, below 3.7 has been associated with depression) High-density lipoprotein (HDL) (>= 1.5 mmol/L) Low-density lipoprotein (LDL) (<2.6 mmol/L) Triglycerides (<1.1 mmol/L). If your lipids are off, make sure to get your diet under control, as well as taking fish oil and exercising regularly. Of course you should see your physician. Also, knowing the particle size of LDL cholesterol is important. Large particles are less toxic than smaller particles.””