Category Archives: Health and Medicine (健康・医療)
Blog articles dealing with medicine and health.
By Billy Hammond (Copyright AELS) I see a lot of ads for cosmetic products pushing collagen on TV. Most people aren’t aware that collagen is a family of proteins. There are at least 28 types of collagen which are found in particular locations in the body (some locations have more than one type). Type I collagen is the most abundant protein in humans and is found in extracellular matrix (ECM) of loose connective tissue, bone, tendons, skin and the cornea of the eye. Thus, not all of the types are related to skin care. For example, Type XXI is found in the heart, skeletal muscle, stomach, kidney and placenta. This is something to keep in mind when you see an ad promoting just “collagen.” Also, if you’re really worried about collagen, you might want to consider taking vitamin C to […]
By Billy Hammond (Copyright AELS) People often worry about cholesterol, but cholesterol is needed to stabilize cell membranes and as a precursor to the bile salts and steroid hormones. Cholesterol is either obtained in the diet or synthesized by a pathway that occurs in most cells of the body, but especially in the liver and intestinal cells. The adrenal cortex and gonads also synthesize cholesterol and use it for steroid hormone synthesis. Cholesterol synthesis requires acetyl CoA, which can be produced from glucose, fatty acids or amino acids. Cholesterol gets packaged into chylomicrons in the intestine and Very Low-density Lipoprotein (VLDL) in the liver. It gets transported in the blood in the lipoprotein particles together with triacylglycerols. The chylomicrons are converted into chylomicron remnants. The VLDL gets converted into Intermediate-density Lipoprotein (IDL) and then into Low Density Lipoprotein (LDL) which […]