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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Caffeine's Effect on Blood Pressure Caffeine's Effect on Blood Pressure. WebMD Medical News . WebMD does not provide medical advice, diagnosis or treatment. See additional information. Effects of caffeine on blood pressure, heart rate, and forearm Systolic blood pressure and MAP were also higher during exercise plus caffeine; however, these increases were secondary to the effects of caffeine on The Coffee Blood Pressure Connection - Caffeine and High Blood Learn about the positive and negative blood pressure effects of caffeine and the coffee of caffeine does not increase the risk of high blood pressure, Coffee and blood pressure In the meantime, it suggests that the effect of drinking 8 cups of coffee a day (75 mg caffeine per cup) on people with normal blood pressure is small. Caffeine and Your Blood Sugar Caffeine does not appear to affect blood sugar when consumed in moderate amounts. you awake at night and causes a temporary rise in your blood pressure. Does Coffee Raise Blood Pressure? (INeedCoffee.com) Does Coffee/Caffeine Consumption Contribute to High Blood Pressure? that regular coffee and caffeine use has little or no effect on blood pressure. BBC NEWS | Health | Caffeine 'does not raise blood pressure' Caffeine 'does not raise blood pressure' Mary's Hospital in London said coffee had a small effect on blood pressure compared to other foods like salt. Caffeine: How does it affect blood pressure? - Yahoo! Health Caffeine can increase blood pressure temporarily. But it's unclear whether it has a long-term effect on blood pressure. Hypertension Risk Status and Effect of Caffeine on Blood Pressure Although the present study does not directly address issues about tolerance to the . Effects of caffeine and cigarette smoking on the blood pressure of Go Ask Alice!: Does caffeine raise blood pressure? Dear Alice, Does caffeine raise your blood pressure? Some folks develop a tolerance to caffeine, and it no longer has this effect. Caffeine: How does it affect blood pressure? - MayoClinic.com Caffeine can temporarily increase blood pressure, but its long-term effects on blood pressure are unclear. |
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