Rabu, 29 Mei 2013

Do we need both HDL (High-density lipoprotein) and LDL (Low-density lipoprotein)?

Q. If so, then how do vegans exist?

A. The liver and the intestines both form lipoproteins such as HDL, LDL, IDL and VLDL. Levels of each are determined by multiple factors. For example, the fats that are carried by the lipoprotein particles come from food and from fat synthesized by the liver.

Eating foods high in cholesterol actually has little effect of serum cholesterol levels(1). The body has a sensitive feedback mechanism that tightly regulates the production of cholesterol (2). When dietary consumption of cholesterol increases, less is produced by the liver. High levels of insulin increase the synthesis of cholesterol by the liver and also by individual cells in the body.

Fats do have an effect on the levels of HDL, LDL and VLDL. Saturated fats strongly increase HDL and to a lesser estent, LDL. Polyunsaturated fats tend to lower both HDL and LDL. A higher refined carbohydrate intake can strongly increase the serum levels of triglycerides, which can also increase LDL. The liver produces primarily palmitic and palmitoeic acid from carbohydrates. Palmitic acid is also the predominant fatty acid in animal.

Since production of HDL, LDL and triglycerides is mediated by many factors, it is impossible to make many generalizations about the association of dietary fats and carbohydrates and serum cholesterol. Very low carbohydrate diets can result in a more favorable lipid profile than a low fat diet (3). Strict meat eaters can have a fairly low serum choleserol while vegans can have a higher serum cholesterol. People eating a paleolithic diet and a vegan diet can have similarities, in so much that both ways of eating discourage the consumption of vegetable seed oils, refined carbohydrates and favor eating whole foods.

What will I do inorder to know my rabbit's high density lipoprotein (HDL) and LOw density lipoprotein (LDL)? ?
Q.

A. Why do you need to know this?

If your bun is acting lethargic, or different from normal, you should get him to a vet. Maybe your vet could do a blood test. But I don't know if that's a standard test for rabbits. I don't think heart disease is very common in rabbits.

low-density lipoprotein(LDL) and trygliceride contents are high in cholestrol, precautions and medicines pls.?
Q.

A. Fish balls and turkey genitalias. Also chicken, hot milk, handcuffs, and Macauly Culkin.




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