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.
Yellow mucus is caused by white blood cells. When your immune system is fighting a cold virus, one of the first symptoms is clear, runny mucus from the nose. As the cold develops, mucus usually becomes thicker and yellow, then green.ellow mucus is caused by white blood cells. When your immune system is fighting a cold virus, one of the first symptoms is clear, runny mucus from the nose. As the cold develops, mucus usually becomes thicker and yellow, then green.