Molecules called lipoproteins carry cholesterol in the blood. Two important kinds of lipoproteins are low-density lipoprotein (LDL) and high-density lipoprotein (HDL). When checking LDL and HDL, doctors often include another type of fat called triglycerides. 1  Total cholesterol is a measure of the total amount of cholesterol in your blood and is based on the HDL, LDL, and triglycerides numbers. 2  LDL cholesterol makes up the majority of the bodyâs cholesterol.
Is your yellow nasal discharge light or dark? A dark yellow mucus can indicate a sinus infection (but again is not necessarily so) while a light yellow mucus can be produced by dry air and a thick yellow mucus can indicate the presence of a cold that requires one to drink more water.
What does Yellow Phlegm Mean. Yellow phlegm means that you are suffering from cold and flu or your upper respiratory tract is under the influence of some microbial infection. Dark yellow phlegm or thick yellow phlegm indicates an infection of lower respiratory tract or sinuses. Yellow green phlegm indicates an infection of the end of the respiratory system. If you are suffering from a chronic sinus problem you might experience frequent discharge of dark yellow phlegm through the nose.