Fat: From 2 Different Sources
A food that has more energy-producing power, weight for weight, than any other. Animal fat is a mixture in varying proportions of stearic, palmitic, and oleic acids combined with glycerin. Butter contains about 80 per cent of fat; ordinary cream, 20 per cent; and rich cream 40 per cent – whilst olive oil is practically a pure form of fat. When taken to a large extent in the diet, fat requires to be combined with a certain proportion of either CARBOHYDRATE or PROTEIN in order that it may be completely consumed, otherwise harmful products, known as ketones, may form in the blood. Each gram of fat has an energy-producing equivalent of 9·3 Calories (see CALORIE).
Fats are divided into saturated fats – that is, animal fats and dairy produce; and unsaturated fats, which include vegetable oils from soya bean, maize and sun?ower, and marine oils from ?sh (e.g. cod-liver oil). (See also ADIPOSE TISSUE; LIPID; OBESITY.)
Body fat Most of the body’s fat is stored in ADIPOSE TISSUE which is mainly sited beneath the skin and around various internal organs. Some, however, is stored in liver, muscle and other cellular structures such as bone marrow (see BONE). Various methods can be used to estimate the body’s fat content but all are indirect and not very accurate, depending as they do on hard-to-measure di?erences in composition between fat and lean tissues. The average body fat of healthy young men and women is below 20 per cent and 25 per cent respectively of their body weight. In economically developed countries, middle-aged men and women usually undergo a steady increase in body fat. This is probably not a feature of ageing, however, since in developing nations, which have di?erent diets and greater levels of physical activity, increased age does not bring with it an increase in body fat. One widely used means to estimate whether a person has excess fat is to measure his or her skinfold thickness on the arms and torso. The distribution of fat can be a pointer to certain disorders: those adults, for example, who deposit their fat abdominally rather than on their hips – an android rather than a gynaecoid distribution – are particularly susceptible to disease of the CARDIOVASCULAR SYSTEM and to DIABETES MELLITUS.
Adipose tissue comprises fat deposited as a result of eating more food than is metabolised by exercise and the body’s basic energy needs. Surplus fat can in some circumstances be a useful energy store. For example, hibernating animals ‘burn o?’ the fat stored during the summer months and are much leaner when they wake up in the spring. Excessive quantities of adipose tissue result in OBESITY, an increasingly serious problem among all age groups, including children, in countries with developed economies.
n. a substance that contains one or more *fatty acids in the form of *triglycerides and is the principal form in which energy is stored by the body (in *adipose tissue). It also serves as an insulating material beneath the skin (in the subcutaneous tissue) and around certain organs (including the kidneys). Fat is one of the three main constituents of food (see also carbohydrate; protein); it is necessary in the diet to provide an adequate supply of *essential fatty acids and for the efficient absorption of fat-soluble vitamins from the intestine. Excessive deposition of fat in the body leads to *obesity. See also brown fat; lipid.
(CFS) is a recently designated semi-disease, often attributed to EBV (the Epstein-Barr virus) or CMV (Cytomegalovirus) infections, characterized by FUOs (Fevers of Unknown Origin) and resulting in the patient suffering FLS (Feels Like Shit). In most of us, the microorganisms involved in CFS usually provoke nothing more than a head cold; in some individuals, however, they induce a long, grinding, and debilitating disorder, characterized by exhaustion, depression, periodic fevers...a crazy-quilt of symptoms that frustrates both the sufferer and the sometimes skeptical physician. MCS (Multiple Chemical Sensitivities) are another syndrome that is often lumped with CFS, and they may often be two faces of the same condition. I am not using all these acronyms to mock the conditions, but as an irony. There is too much (Acronym Safety Syndrome) in medicine, reducing complex and frustrating conditions to insider’s techno-babble, somehow therein trivializing otherwise complex, painful and crazy-making problems. The widest use of acronyms (AIDS, HIV, CFS, MCS, MS etc.) seems to be for diseases hardest to treat, least responsive to procedural medicine, and most depressing to discuss with patients or survivors.... chronic fatigue syndrome
The number of fatal cases of specific disease, divided by total number of known cases and it is usually expressed as percent. Case fatality is one index of disease severity and is of more interest in acute than in chronic disease.... case fatality rate
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
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
See MYALGIC ENCEPHALOMYELITIS (ME).... post-viral fatigue syndrome
See also MYALGIC ENCEPHALOMYELITIS (ME). A condition characterised by severe, disabling mental and physical fatigue brought on by mental or physical activity and associated with a range of symptoms including muscle pain, headaches, poor sleep, disturbed moods and impaired concentration. The prevalence of the condition is between 0.2 and 2.6 per cent of the population (depending on how investigators de?ne CFS/ME). Despite the stereotype of ‘yuppie ?u’, epidemiological research has shown that the condition occurs in all socioeconomic and ethnic groups. It is commoner in women and can also occur in children.
In the 19th century CFS was called neurasthenia. In the UK, myalgic encephalomyelitis (ME) is often used, a term originally introduced to describe a speci?c outbreak such as the one at the Royal Free Hospital, London in 1955. The term is inaccurate as there is no evidence of in?ammation of the brain and spinal cord (the meaning of encephalomyelitis). Doctors prefer the term CFS, but many patients see this as derogatory, perceiving it to imply that they are merely ‘tired all the time’ rather than having a disabling illness.
The cause (or causes) are unknown, so the condition is classi?ed alongside other ‘medically unexplained syndromes’ such as IRRITABLE BOWEL SYNDROME (IBS) and multiple chemical sensitivity – all of which overlap with CFS. In many patients the illness seems to start immediately after a documented infection, such as that caused by EPSTEIN BARR VIRUS, or after viral MENINGITIS, Q FEVER and TOXOPLASMOSIS. These infections seem to be a trigger rather than a cause: mild immune activation is found in patients, but it is not known if this is cause or e?ect. The body’s endocrine system is disturbed, particularly the hypothalamopituitary-adrenal axis, and levels of cortisol are often a little lower than normal – the opposite of what is found in severe depression. Psychiatric disorder, usually depression and/or anxiety, is associated with CFS, with rates too high to be explained solely as a reaction to the disability experienced.
Because we do not know the cause, the underlying problem cannot be dealt with e?ectively and treatments are directed at the factors leading to symptoms persisting. For example, a slow increase in physical activity can help many, as can COGNITIVE BEHAVIOUR THERAPY. Too much rest can be harmful, as muscles are rapidly weakened, but aggressive attempts at coercing patients into exercising can be counter-productive as their symptoms may worsen. Outcome is in?uenced by the presence of any pre-existing psychiatric disorder and the sufferer’s beliefs about its causes and treatment. Research continues.... chronic fatigue syndrome (cfs)
(Greek) One’s destiny Fayte, Faite, Faete, Faet, Fait, Fayt... fate
(Arabic) The perfect woman; in the Koran, a daughter of Muhammad Fatimah, Fateema, Fatyma, Fateama, Fatime, Fatyme, Fateem, Fateam, Fatuma, Fatiema, Fateima... fatima
(Arabic) A captivating woman Fatina, Fateena, Fateenah, Fatyna, Fatynah, Fatin, Fatine, Faatinah, Fateana, Fateanah, Fatiena, Fatienah, Fateina, Fateinah... fatinah
Contain Frangula 2.5 per cent, Senna leaves 65.25 per cent, Ispaghula 6.75 per cent, Meadowsweet 5.125 per cent, Mate leaves 13.5 per cent, Nettles 6.75 per cent. Non-persistent constipation. ... father pierre’s monastery herbs
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
See fats and oils; nutrition.... saturated fats
See fats and oils.... unsaturated fats
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
an autosomal *dominant disorder due to a mutation in the gene for the *prion protein (PrP): it is an example of a *spongiform encephalopathy. Patients present with intractable progressive insomnia, disturbances of the autonomic nervous system, and eventually dementia.... fatal familial insomnia
see stress fracture.... fatigue fracture
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
Nutrients that provide the body with its most concentrated form of energy. Fats, which are also called lipids, are compounds containing chains of carbon and hydrogen with very little oxygen. Chemically, fats consist mostly of fatty acids combined with glycerol. They are divided into 2 main groups, saturated and unsaturated, depending on the proportion of hydrogen atoms. If the fatty acids contain the maximum possible quantity of hydrogen, the fats are saturated. If some sites on the carbon chain are unoccupied by hydrogen, they are unsaturated; when many sites are vacant, they are polyunsaturated. Monounsaturated fats are unsaturated fats with only one site that could take an extra hydrogen. Animal fats, such as those in meat and dairy products, are largely saturated, whereas vegetable fats tend to be unsaturated.
Fats are usually solid at room temperature; oils are liquid. The amount and types of fat in the diet have important implications for health. A diet containing a large amount of fat, particularly saturated fat, is linked to an increased risk of atherosclerosis and subsequent heart disease and stroke.
Some dietary fats, mainly triglycerides (combinations of glycerol and 3 fatty acids), are sources of the fat-soluble vitamins A, D, E, and K and of essential fatty acids. Triglycerides are the main form of fat stored in the body. These stores act as an energy reserve and also provide insulation and a protective layer for delicate organs. Phospholipids are structural fats found in cell membranes. Sterols, such as cholesterol, are found in animal and plant tissues; they have a variety of functions, often being converted into hormones or vitamins.
Dietary fats are first emulsified by bile salts before being broken down by lipase, a pancreatic enzyme. They are absorbed via the lymphatic system before entering the bloodstream.Lipids are carried in the blood bound to protein; in this state they are known as lipoproteins. There are 4 classes of lipoprotein: very low-density lipoproteins (VLDLs), low-density lipoproteins (LDLs), high-density lipoproteins (HDLs), and chylomicrons. LDLs and VLDLs contain large amounts of cholesterol, which they carry through the bloodstream and deposit in tissues. HDLs pick up cholesterol and carry it back to the liver for processing and excretion. High levels of LDLs are associated with atherosclerosis, whereas HDLs have a protective effect. (See also nutrition.)... fats and oils
see nonalcoholic fatty liver disease; acute fatty liver of pregnancy.... fatty liver
see case fatality rate.... hospital fatality rate
(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
(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.... omega-3 fatty acids
see CFS/ME/PVF.... postviral fatigue syndrome
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
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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