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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Tarik's World Dot Com: Salt restriction necessary in high blood Many people with high blood pressure see salt as a villain. For many people, extra salt really does raise blood pressure. In a few cases, however, High Blood Pressure, Factors That Contribute to Most Americans consume far more salt (sodium) than their bodies need. Heavy sodium consumption increases blood pressure in some people, leading to high High Blood Pressure - Tips to Eat Less Salt and Sodium Simple tips to eating less salt and sodium in your diet. Salt and Blood Pressure - Second Opinions Nevertheless, the argument is that salt increases blood pressure and that raised blood pressure causes stroke, brain haemorrhage and heart disease. Avoid Salt to Reduce Blood Pressure Look beyond the saltshaker to reduce your sodium intake â” most added salt comes from processed foods. Blood pressure risk to children from high salt diets | Science Higher salt diets in children lead to raised blood pressure which increases the risk of heart disease and stroke in later life, according to a study based Salt gives 4-year-olds high blood pressure | the Daily Mail Children as young as four are suffering from raised blood pressure because they are eating too many salty processed foods, researchers say. Health, Medical, & Fitness: High Blood Pressure: Salt or Insulin Nowhere in medicine is there more confusion than the issue of salt as a cause of high blood pressure. At the 2006 meeting of the American Association of LACK OF BLOOD PRESSURE SALT-SENSITIVITY SUPPORTS A PREGLOMERULAR how salt intake affects blood pressure at the very earliest stages of the curve relating blood pressure to steady-state salt intake (or excre- High Blood Pressure - Salt: Limit your intake for better heart health Recently, the Food and Drug Administration held a public hearing about salt. It's considering whether or not to regulate and limit the amount of it in Journal of Human Hypertension - Abstract of article: Salt and To study the relationship between salt intake and blood pressure in children and salt, blood pressure, cross-sectional study, children and adolescents High Blood Pressure: Is Salt Really a Culprit? The salt-high blood pressure debate rages on, with new research showing mineral deficiencies may be more to blame. Study: Reducing salt really does lower blood pressure Cutting back on salt not only lowers your blood pressure, but it lowers it by much more than previously thought, according to a new study in the New England Food Standards Agency - Eat well, be well - Blood pressure Evidence shows that cutting down on salt can reduce blood pressure, Animation showing how salt can affect blood pressure - from our salt website Salt and high blood pressure. Reduce salt to lower high blood pressure Too much salt The amount of salt that we eat has a direct effect on our blood pressure. The more salt we eat, the higher our blood pressure. Low blood pressure This leads to a loss of salt from your body and this may cause low blood pressure, with dizziness or faintness when you stand up suddenly. Ask the Dietitian - by Joanne Larsen MS RD LD - Salt & Sodium Got questions about Salt Intake and High Blood Pressure? Ask Joanne Larsen, Registered Dietitian and nutrition counselor. Salt and Hypertension And all this leads to the final point about salt and blood pressure: the only rationale offered for reducing salt to reduce blood pressure (in some people) |
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