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.
Green or Dark Yellow Phlegm. A thick and dark yellow phlegm may be a sign of a viral or bacterial infection, sinus infection, or lower respiratory tract infection. Typically, this occurs when the immune system sends white blood cells, known as neutrophils, to the area of infection.his causes the mucus to stagnate and dry out, leading to a white discharge. Meanwhile, coughing up gray phlegm may be a sign that the body is trying to get rid of resins or tars that accumulated from excessive smoking or inhalation of large amounts of air pollutants like smog or dust.