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( Sterol) Sterols, or steroid alcohols are a subgroup of steroids with a hydroxyl group at the 3-position of the A-ring.^[1] They are amphipathic lipids synthesized from acetyl-coenzyme A via the HMG-CoA reductase pathway. The overall molecule is quite flat. The hydroxyl group on the A ring is polar. The rest of the aliphatic chain is non-polar.

Sterols of plants are called phytosterols and sterols of animals are called zoosterols. Important zoosterols are cholesterol and some steroid hormones; notable phytosterols include campesterol, sitosterol, and stigmasterol. Ergosterol is a sterol present in the cell membrane of fungi, where it serves a role similar to cholesterol in animal cells.

Sterols and related compounds play essential roles in the physiology of eukaryotic organisms. For example, cholesterol forms part of the cellular membrane in animals, where it affects the cell membrane's fluidity and serves as secondary messenger in developmental signaling. In humans and other animals, corticosteroids, such as cortisol act as signalling compounds in cellular communication and general metabolism.

Phytosterols may block cholesterol absorption sites in the human intestine thus helping to reduce cholesterol in humans.^{[citation needed]}

Sterol Subcategories Sterol Articles Top 10 Low Cholesterol Foods by Andrea Pelin The foods that don`t have cholesterol, are high in soluble fibers, and also contain antioxidants should be consumed in any diet and include: Vegetables Spinach, tomatoes, celery, sweet potatoes, broccoli, green, leafy vegetables, onio... High Cholesterol In The Blood Or Hyperlipidemia by India Internet The pathological conditions in which there are high levels of fats in the blood. The medical term for these conditions is hyperlipidemia, which is made of three parts; hyper-, is a prefix meanings more or extra, lipid is fat, and emia is a suffix ind... High Fiber Diet Plan: The Pros And Cons by Mark Green An oft-overlooked, but very heart healthy diet is a high fiber diet plan. Obviously this high fiber diet plan is high in fiber, but additionally it also tends to include a diet that is lower in caloric intake as well. The reason the high fiber diet p... Is It Really Possible to Prevent, Manage or Reverse Obesity, Diabetes, Heart Disease. by smith Poinl They are the biggest killers in America : Diabetes, high cholesterol, high blood pressure and heart disease. The most common causes of these deadly conditions are: Physical inactivity, obesity, stress, smoking, poor food, snack and beverage choices. ... Memory Loss: Susceptible to Older People with Active Social Life by Chicco Tatoy Memory loss comes with aging, and this alone can give out devastating effects on the individual, especially those among the older set. In a recent study conducted by the Harvard School of Public Health, the researchers found evidence that older peopl... Tai Chi for Your Head and Your Heart by Simon Evans We’ve written before about the benefits of Tai Chi for your brain fitness and your immune system. In fact, we go into some detail on this topic in a couple sections of our new book, BrainFit for Life. Now a new study shows some stri... Organic Green Tea - Just What is Organic Anyway? by Kev Woodward A traveller saw two fields of tea bushes at the side of the road. In one field, the farmer was happily picking the fresh green young leaves, however in the other, the farmer was spraying his plants to destroy the insects that were ruining his crop. S... Dieting Myths Debunked by Dave Tishendorf You no doubt have heard your fair share of dieting myths, some of which you may not have recognized as myths. For example: ** The PT dieting myth: Weight loss is very difficult, and you need to have a personal trainer to achieve a decent amou... Cholesterol Diet by John Brenner Detox Diet: Detox Cleanse Diseases such as cancer. A proper even if occasional detox diet is necessary to relieve our bodies of harmful toxins and chemicals and maintain a healthy normal and long-lived life. Why detox you ask? Well for thou...