News tagged with cholesterol

Related topics: heart disease · heart attack · cholesterol levels · cardiovascular disease · stroke

Review compares metformin, OCP for teens with PCOS

(HealthDay)—For adolescents with polycystic ovarian syndrome (PCOS), treatment with metformin and oral contraceptive pills can be beneficial, although evidence is limited, according to a review published online April 28 ...

Apr 28, 2016
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No need to fast before a cholesterol test

New research from Denmark, Canada and the US involving more than 300,000 individuals suggests that patients do not need to check their cholesterol levels on an empty stomach. So far fasting has been required before cholesterol ...

Apr 27, 2016
popularity37 comments 1

Sleep loss detrimental to blood vessels

Lack of sleep has previously been found to impact the activation of the immune system, inflammation, carbohydrate metabolism and the hormones that regulate appetite. Now University of Helsinki researchers have found that ...

Apr 22, 2016
popularity183 comments 0

Genetic vitamin K1 levels linked to heart disease

(HealthDay)—Genetically determined vitamin K1 is associated with coronary artery disease (CAD) and myocardial infarction (MI), according to a study published online April 8 in the Journal of Thrombosis and Haemostasis.

Apr 18, 2016
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Cholesterol

Cholesterol is a lipidic, waxy steroid found in the cell membranes and transported in the blood plasma of all animals. It is an essential component of mammalian cell membranes where it is required to establish proper membrane permeability and fluidity. Cholesterol is the principal sterol synthesized by animals, but small quantities are synthesized in other eukaryotes, such as plants and fungi. It is almost completely absent among prokaryotes, which include bacteria. Cholesterol is classified as a sterol.

Since cholesterol is essential for life, it is primarily synthesized de novo within the body. However excessive levels of cholesterol in blood circulation are strongly associated with progression of atherosclerosis. For an adult, typical total body cholesterol synthesis is about 1 gram per day (less if dietary intake is high) and total body cholesterol content is about 35 g. Average dietary intake in western societies is 0.2 - 0.3 grams. Cholesterol is excreted by the liver via the bile into the digestive tract. Typically about 50% of the excreted cholesterol is reabsorbed by the small bowel back into the blood stream.

The name cholesterol originates from the Greek chole- (bile) and stereos (solid), and the chemical suffix -ol for an alcohol, as François Poulletier de la Salle first identified cholesterol in solid form in gallstones, in 1769. However, it was only in 1815 that chemist Eugène Chevreul named the compound "cholesterine".

This text uses material from Wikipedia, licensed under CC BY-SA

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