What is Cholesterol?

Cholesterol is a sterol (a combination steroid and alcohol). Cholesterol is a lipid found in the cell membranes of all tissues, and it is transported in the blood plasma of all animals. Because cholesterol is synthesized by all eukaryotes, trace amounts of cholesterol are also found in membranes of plants and fungi.The name originates from the Greek chole- (bile) and stereos (solid), and the chemical suffix -ol for an alcohol, as researchers first identified cholesterol in solid form in gallstones by Francois Poulletier de la Salle in 1769. However, it is only in 1815 that chemist Eugene Chevreul named the compound "cholesterine".[2]Most of the cholesterol is synthesized by the body and some has dietary origin. Cholesterol is more abundant in tissues which either synthesize more or have more abundant densely-packed membranes, for example, the liver, spinal cord and brain. It plays a central role in many biochemical processes, such as the composition of cell membranes and the synthesis of steroid hormones. Cholesterol is insoluble in blood, but is transported in the circulatory system bound to one of the varieties of lipoprotein, spherical particles which have an exterior composed mainly of water-soluble proteins. The main types, low-density lipoprotein (LDL) and high-density lipoprotein (HDL) carry cholesterol from and to the liver.According to the lipid hypothesis, abnormally high cholesterol levels (hypercholesterolemia) and abnormal proportions of LDL and HDL are associated with cardiovascular disease by promoting atheroma development in arteries (atherosclerosis). This disease process leads to myocardial infarction (heart attack), stroke and peripheral vascular disease. As high LDL contributes to this process, it is termed "bad cholesterol", while high levels of HDL ("good cholesterol") offer a degree of protection. The balance can be redressed with exercise, a healthy diet, and sometimes medication.

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NEJM -- Increased blood pressure during potassium depletion in
We evaluated the effect of a low potassium diet on blood pressure in normotensive (NT) In the NT group, the low potassium diet was associated with lower

Effect of dietary potassium on blood pressure, renal function
Does potassium supplementation lower blood pressure? A meta-analysis of published trials. J Hypertens 1991;9:465-73. Medline; Witteman JCM, Grobbee DE,

Orthostatic Hypotension: Low Blood Pressure: Merck Manual Home Edition
Chocolate, and 7 other foods to lower blood pressure (and too much sodium raises blood pressure). When potassium is high, the body gets rid of sodium.

Chocolate and other foods to cut blood pressure - Health - MSNBC.com
Many of these foods are rich in potassium, fiber, or both, possibly helping lower blood pressure. Include nuts, seeds, or legumes (dried beans or peas)

High Blood Pressure - Lifestyle Changes
To investigate the effect of dietary potassium restriction on blood pressure, we used a randomized crossover design to study 10 healthy, normotensive men

POTASSIUM HELPS LOWER BLOOD PRESSURE
Orthostatic hypotension is an excessive decrease in blood pressure that can also cause a loss of potassium, so taking a potassium supplement may be

Ask the Dietitian - by Joanne Larsen MS RD LD - Salt & Sodium
A sedentary lifestyle, stress, low potassium intake, low calcium intake, and resistance to insulin may also cause your blood pressure to rise.

High Blood Pressure (Hypertension) - Yahoo! Health
Learn about the recent studies of potassium and high blood pressure. that adequate potassium intake from fruits and vegetables can lower blood pressure.

Potassium Recommendation for People with High Blood Pressure
Hopkins scientists have crunched data from 33 previous studies to authoritatively answer an enduring public health question: can potassium lower blood

Low blood pressure in vegetarians: the possible role of potassium.
A reduction in sodium helps lower blood pressure in all people with hypertension. Newer evidence suggests that dietary potassium may play a role in

Potassium and Health
Salt has been blamed in the past as causing high blood pressure. New research though is suggesting that too little calcium or potassium as having some

Diuretics: A cause of low potassium? - MayoClinic.com
The average blood pressure was 126/77 for the vegetarians and 147/88 for the control group (p less than 0.05). Significantly lower blood pressure was found

Your High Blood Pressure Questions Answered â” Potassium
Many diuretics decrease potassium in the blood. Diuretics lower blood pressure by helping your body eliminate sodium and water, which reduces blood volume

Potassium
to pass water more often when started. slight rise in sugar level. unwanted. lower potassium (occasional blood test needed). lower blood pressure (dizzy)

Blood pressure and diabetes
Research has shown that potassium may help lower blood pressure. But potassium should be considered as only part of your total dietary pattern.

Potassium (K) in Blood
Low potassium can result in elevated sodium in cells, because the two balance one another. It may help to lower high blood pressure in some people,

Natural Remedies for High Blood Pressure
Some animal and early human studies did suggest that potassium supplements could help to lower blood pressure. More recent well-designed studies, however,

Blood Pressure - Magnesium, Potassium, Minerals, and Garlic
Abnormal potassium levels may cause symptoms such as muscle cramps or weakness, nausea, diarrhea, frequent urination, dehydration, low blood pressure,


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