Omega-3 fatty acids Health Dictionary

Omega-3 Fatty Acids: From 1 Different Sources


(n-3 fatty acids) polyunsaturated fatty acids with a double bond at the third carbon atom in the chain. Omega-3 fatty acids are essential for brain development and are also associated with many health benefits, including protection against heart disease and possibly stroke and inflammatory conditions. There are three major types: alpha-linolenic acid (ALA), eicosapentaenoic acid (EPA), and docosahexaenoic acid (DHA). The main source of EPA and DHA is fish oils. Vegetarians rely on EPA and DHA being synthesized by the body from dietary sources of ALA. See also essential fatty acids.
Health Source: Oxford | Concise Colour Medical Dictionary
Author: Jonathan Law, Elizabeth Martin

Amino Acids

Chemical compounds that are the basic building-blocks of all proteins. Each molecule consists of nitrogenous amino and acidic carboxyl groups of atoms joined to a group of carbon atoms. Polypeptides are formed by amino-acid molecules linking via peptide bonds. Many polypeptides link up in various con?gurations to form protein molecules. In humans, proteins are made up from 20 di?erent amino acids: nine of these are labelled ‘essential’ (or, as is now preferred, ‘indispensable’) amino acids because the body cannot manufacture them and is dependent on the diet for their provision. (See also INDISPENSABLE AMINO ACIDS.)... amino acids

Essential Fatty Acids

Three acids – arachidonic, linolenic and tinoleic – which are essential for life, but which the body cannot produce. They are found in natural vegetable and ?sh oils and their functions are varied. EFAs have a vital function in fat metabolism and transfer and they are also precursors of PROSTAGLANDINS.... essential fatty acids

Fatty Degeneration

As a result of ANAEMIA, interference with blood or nerve supply, or because of the action of various poisons, body cells may undergo abnormal changes accompanied by the appearance in their substance of fat droplets.... fatty degeneration

Essential Amino Acids

See INDISPENSABLE AMINO ACIDS.... essential amino acids

Indispensable Amino Acids

This is the new, preferred term for essential amino acids – amino acids which are essential for the body’s normal growth and development, but which the body is unable to produce. Nine essential amino acids exist – HISTIDINE, ISOLEUCINE, LEUCINE, LYSINE, METHIONINE, PHENYLALANINE, THREONINE, TRYPTOPHAN, and VALINE – and they are present in foods rich in protein: dairy products, eggs, meat, and liver.... indispensable amino acids

Omega

(Greek) The last great one; the last letter of the Greek alphabet Omegah, Omegia, Omegiah... omega

Essential Fatty Acids (efa)

A group of unsaturated fatty acids essential for growth and body function. EFA activity requires three polyunsaturated fatty acids (linolenic, linoleic and arachidonic). The most essential are linoleic and arachidonic which are closely involved in metabolism, transport of fats, and maintenance of cell membranes. While linolenic and arachidonic acids can be synthesised in the body, linoleic cannot.

EFA deficiency may be caused by alcohol, particularly Omega-6. Deficiencies may be responsible for a wide range of symptoms from foul-smelling perspiration to psoriasis, pre-menstrual tension and colic. EFAs are precursors of prostaglandin formation.

EFAs are present in oily fish and reduce the adhesion of platelets and the risk of heart disease. They reduce blood cholesterol and increase HDLs.

Common sources: cold pressed seeds, pulses, nuts and nut oils. Evening Primrose oil (15-20 drops daily). The best known source is Cod Liver oil (1-8 teaspoons daily); (children 1 teaspoon daily to strengthen immune system against infection); bottled oil preferred before capsules. To increase palatability pour oil into honey jar half filled with orange or other fruit juice, shake well and drink from the jar.

Margarines, salad dressings, cooking and other refined vegetable oils inhibit complete absorption of EFAs and should be avoided. EFAs require the presence of adequate supply of Vitamins A, B, C, D, E and minerals Calcium, Iron, Magnesium and Selenium. ... essential fatty acids (efa)

Heart – Fatty Degeneration

A deposit and infiltration of fat on the heart in the obese and heavy consumers of alcohol. Distinct from true degeneration in which there is no destruction of tissue. Symptoms. Breathlessness and palpitation on slight exertion. Anginal pain: see ANGINA. Mental dullness. May follow enlargement of the heart and acute infections such as influenza.

Alternatives. Teas. Alfalfa, Clivers, Yarrow, Motherwort.

Tablets/capsules. Poke root, Kelp, Motherwort.

Formula. Equal parts: Bladderwrack, Motherwort, Aniseed, Dandelion. Dose. Powders: 500mg (two 00 capsules or one-third teaspoon). Liquid extracts: 1 teaspoon. Tinctures: 2 teaspoons in water thrice daily. Black Cohosh. Introduced into the medical world in 1831 when members of the North American Eclectic School of physicians effectively treated cases of fatty heart.

Diet. Vegetarian protein foods, high-fibre, whole grains, seed sprouts, lecithin, soya products, low-fat yoghurt, plenty of raw fruit and vegetables, unrefined carbohydrates. Oily fish: see entry. Dandelion coffee. Reject: alcohol, coffee, salt, sugar, fried foods, all dairy products except yoghurt.

Supplements. Daily. Broad-spectrum multivitamin including Vitamins A, B-complex, B3, B6, C (with bioflavonoids), E, Selenium. ... heart – fatty degeneration

Fatty Acids

Organic acids, containing carbon, hydrogen, and oxygen, that are constituents of fats and oils. There are more than 40 fatty acids, which are found in nature and which are distinguished by their constituent number of carbon and hydrogen atoms.

Certain fatty acids cannot be synthesized by the body and must be provided by the diet. These are linoleic, linolenic, and arachidonic acids, sometimes collectively termed essential fatty acids. Strictly speaking, only linoleic acid is essential, since the body can make the other 2 from linoleic acid obtained from food. (See also nutrition.)... fatty acids

Acute Fatty Liver Of Pregnancy

a rare and life-threatening complication of pregnancy that usually presents in the third trimester with symptoms of nausea, vomiting, malaise, and abdominal pain. Liver function tests are abnormal and the features of *pre-eclampsia and often *HELLP syndrome are present. *Hepatic encephalopathy, *disseminated intravascular coagulation, and renal failure may develop, and the condition is associated with a high maternal and fetal mortality. Treatment involves a multidisciplinary approach, usually in an intensive care unit.... acute fatty liver of pregnancy

Fatty Acid

an organic acid with a long straight hydrocarbon chain and an even number of carbon atoms. Fatty acids are the fundamental constituents of many important lipids, including *triglycerides. Some fatty acids can be synthesized by the body; others, the *essential fatty acids, must be obtained from the diet. Examples of fatty acids are palmitic acid, oleic acid, and stearic acid. See also fat; saturated fatty acid; unsaturated fatty acid.... fatty acid

Liver – Fatty

Destruction of normal liver cells and their replacement by fat.

Causes: obesity; environmental chemicals, toxins from fevers (influenza, etc).

Alternatives. Teas. Boldo, Clivers, Motherwort, Chaparral. One heaped teaspoon to each cup boiling water infused 15 minutes. 1 cup freely.

Tablets/capsules. Seaweed and Sarsaparilla.

Formula. Fringe Tree 2; Clivers 1; Bladderwrack (fucus) 1. Dose: Liquid Extracts: 1 teaspoon. Tinctures: 1-2 teaspoons. Powders: 750mg (three 00 capsules or half a teaspoon) thrice daily.

Cider Vinegar. 2-3 teaspoons to glass water. Drink freely.

Evening Primrose oil. 4 × 500mg capsules daily.

Diet. Fat-free. Dandelion coffee. Artichokes.

Supplementation. Vitamin B6. C. K. Zinc. Kelp. ... liver – fatty

Nucleic Acids

Substances found in all living matter that have a fundamental role in the propagation of life. Nucleic acids provide the inherited coded instructions (or “blueprint”) for an organism’s development.

There are 2 types of nucleic acid: deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). In all plant and animal cells, including human cells, DNA permanently holds the coded instructions, which are translated and implemented by RNA. DNA is the main constituent of chromosomes, which are carried in the nucleus (central unit) of the cell.

DNA and RNA are similar in structure, both comprising long, chain-like molecules. However, DNA usually consists of 2 intertwined chains, whereas RNA is generally single-stranded.

The basic structure of DNA has been likened to a rope ladder, the chains forming the 2 sides, with interlinking structures in between forming the rungs.

The ladder is twisted into a spiral shape called a double helix.

Each DNA chain has a “backbone” consisting of a string of sugar and phosphate chemical groups. Attached to each sugar is a chemical called a base, which can be any of 4 types (adenine, thymine, guanine, and cytosine) and forms half a rung of the DNA ladder. The 4 bases can occur in any sequence along the chain. The sequence, which may be many millions of individual bases long, provides the code for the activities of the cell (see genetic code).

RNA is like a single strand of DNA; the main difference is that the base thymine is replaced by another base, uracil.When a cell undergoes mitotic (see mitosis) division, identical copies of its DNA must go to each of the 2 daughter cells. The 2 DNA chains separate, and 2 more chains are formed, side by side with the original chains. Because only certain base pairings are possible, the new double chains are identical to the original DNA molecule. Each of a person’s cells carries the same DNA replica that was present in the fertilized ovum, so the DNA message passes from one generation of cells to the next.... nucleic acids

Bile Acids

the organic acids in bile; mostly occurring as bile salts (sodium glycocholate and sodium taurocholate). They are cholic acid, deoxycholic acid, glycocholic acid, and taurocholic acid.

cebile-acid sequestrant a drug that binds to bile acids, forming a complex that is excreted in the faeces. Bile acids are formed in the liver from *cholesterol and the effect of loss of bile acids is a reduction in total body cholesterol and a decrease in *low-density lipoprotein serum levels. These drugs, which include *colestyramine and *colestipol, are used to treat patients with abnormally high blood cholesterol levels who are liable to develop coronary heart disease.... bile acids

Fatty Liver

see nonalcoholic fatty liver disease; acute fatty liver of pregnancy.... fatty liver

Nonalcoholic Fatty Liver Disease

(NAFLD) a spectrum of conditions affecting the liver in the absence of excessive alcohol consumption. NAFLD is a common cause of referral for patients with abnormal liver function tests. Fatty liver is excessive fat accumulation in the liver seen as an area of brightness within the liver on ultrasound examination. Fatty liver does not lead to irreversible liver damage in the majority of cases. Nonalcoholic steatohepatitis (NASH) is inflammation of the liver associated with accumulation of fat. It is often linked to insulin resistance, diabetes, hypertension, obesity, and *metabolic syndrome. Treatment involves dietary modification, regular physical exercise, weight reduction, and management of underlying conditions (e.g. diabetes, hypertension, and hiperlipidaemia). NASH may predispose to *cirrhosis and may ultimately require liver transplantation.... nonalcoholic fatty liver disease

Saturated Fatty Acid

a *fatty acid in which all the carbon atoms are linked by single bonds and the molecule is unable to accept additional atoms (i.e. it cannot undergo addition reactions with other molecules). These fats occur mainly in animal and dairy products, and a diet high in these foods may contribute to a high serum cholesterol level, which may increase the risk of *coronary artery disease. Compare unsaturated fatty acid.... saturated fatty acid

Unsaturated Fatty Acid

a *fatty acid in which one (monounsaturated) or many (polyunsaturated) of the carbon atoms are linked by double bonds that are easily split in chemical reactions so that other substances can connect to them. These fats occur in fish and plant-derived foods, and a diet high in unsaturated fats is associated with low serum cholesterol levels. Compare saturated fatty acid.... unsaturated fatty acid



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