Diabetic diet
Encyclopedia
There is much controversy regarding what diet to recommend to sufferers of diabetes mellitus
Diabetes mellitus
Diabetes mellitus, often simply referred to as diabetes, is a group of metabolic diseases in which a person has high blood sugar, either because the body does not produce enough insulin, or because cells do not respond to the insulin that is produced...

. The diet most often recommended is high in dietary fiber
Dietary fiber
Dietary fiber, dietary fibre, or sometimes roughage is the indigestible portion of plant foods having two main components:* soluble fiber that is readily fermented in the colon into gases and physiologically active byproducts, and* insoluble fiber that is metabolically inert, absorbing water as it...

, especially soluble fiber, but low in fat (especially saturated fat
Saturated fat
Saturated fat is fat that consists of triglycerides containing only saturated fatty acids. Saturated fatty acids have no double bonds between the individual carbon atoms of the fatty acid chain. That is, the chain of carbon atoms is fully "saturated" with hydrogen atoms...

). Recommendations of the fraction of total calories to be obtained from carbohydrate
Carbohydrate
A carbohydrate is an organic compound with the empirical formula ; that is, consists only of carbon, hydrogen, and oxygen, with a hydrogen:oxygen atom ratio of 2:1 . However, there are exceptions to this. One common example would be deoxyribose, a component of DNA, which has the empirical...

 intake range from 1/6 to 75% – a 2006 review found recommendations varying from 40 to 65%. Diabetics may be encouraged to reduce their intake of carbohydrates that have a high glycemic index
Glycemic index
The glycemic index, glycaemic index, or GI is a measure of the effects of carbohydrates on blood sugar levels. Carbohydrates that break down quickly during digestion and release glucose rapidly into the bloodstream have a high GI; carbohydrates that break down more slowly, releasing glucose more...

 (GI), although this is also controversial. (In cases of hypoglycemia
Hypoglycemia
Hypoglycemia or hypoglycæmia is the medical term for a state produced by a lower than normal level of blood glucose. The term literally means "under-sweet blood"...

, they are advised to have food or drink that can raise blood glucose quickly, followed by a long-acting carbohydrate (such as rye bread
Rye bread
Rye bread is a type of bread made with various percentages of flour from rye grain. It can be light or dark in color, depending on the type of flour used and the addition of coloring agents, and is typically denser than bread made from wheat flour...

) to prevent risk of further hypoglycemia.) However, others question the usefulness of the glycemic index and recommend high-GI foods like potatoes and rice.

History

There has been long history of dietary treatment of diabetes mellitus
Diabetes mellitus
Diabetes mellitus, often simply referred to as diabetes, is a group of metabolic diseases in which a person has high blood sugar, either because the body does not produce enough insulin, or because cells do not respond to the insulin that is produced...

 – dietary treatment of diabetes mellitus was used in Egypt as long ago as 3,500 B.C., and was used in India by Sushruta and Charaka
Charaka
Charaka, sometimes spelled Caraka, born c. 300 BC was one of the principal contributors to the ancient art and science of Ayurveda, a system of medicine and lifestyle developed in Ancient India...

 more than 2000 years ago. In the eighteenth century, these authors note, John Rollo argued that calorie restriction in the diabetic diet could reduce glycosuria
Glycosuria
Glycosuria or glucosuria is the excretion of glucose into the urine. Ordinarily, urine contains no glucose because the kidneys are able to reclaim all of the filtered glucose back into the bloodstream. Glycosuria is nearly always caused by elevated blood glucose levels, most commonly due to...

 in diabetes. However, more modern history of the diabetic diet may begin with Frederick Madison Allen
Frederick Madison Allen
Frederick Madison Allen was a doctor who is perhaps best remembered today for his work on a diet for sufferers of diabetes mellitus. Born in Iowa, he later studied medicine in California, after which time he was employed in a poorly paid position at Harvard University, before his work in New...

, who, in the days before insulin
Insulin
Insulin is a hormone central to regulating carbohydrate and fat metabolism in the body. Insulin causes cells in the liver, muscle, and fat tissue to take up glucose from the blood, storing it as glycogen in the liver and muscle....

 was discovered, recommended that people with diabetes ate only a low-calorie
Calorie
The calorie is a pre-SI metric unit of energy. It was first defined by Nicolas Clément in 1824 as a unit of heat, entering French and English dictionaries between 1841 and 1867. In most fields its use is archaic, having been replaced by the SI unit of energy, the joule...

 diet to prevent ketoacidosis
Ketoacidosis
Ketoacidosis is a metabolic state associated with high concentrations of ketone bodies, formed by the breakdown of fatty acids and the deamination of amino acids. The two common ketones produced in humans are acetoacetic acid and β-hydroxybutyrate....

 from killing them. This was an approach which did not actually cure diabetes, it merely extended life by a limited period. The first use of insulin by Frederick Banting
Frederick Banting
Sir Frederick Grant Banting, KBE, MC, FRS, FRSC was a Canadian medical scientist, doctor and Nobel laureate noted as one of the main discoverers of insulin....

 in 1922 changed things, and at last allowed patients more flexibility in their eating.

Exchange scheme

In the 1950s, the American Diabetes Association
American Diabetes Association
The American Diabetes Association is a United States-based association working to fight the consequences of diabetes, and to help those affected by diabetes...

, in conjunction with the U.S. Public Health Service
United States Public Health Service
The Public Health Service Act of 1944 structured the United States Public Health Service as the primary division of the Department of Health, Education and Welfare , which later became the United States Department of Health and Human Services. The PHS comprises all Agency Divisions of Health and...

, brought forth the "exchange scheme". This was a scheme that allowed people to swap foods of similar nutritional value (e.g. carbohydrate) for another, so, for example, if wishing to have more than normal carbohydrates for dessert, one could cut back on potatoes in one's first course. The exchange scheme was revised in 1976, 1986 and 1995.

Later developments

However, not all diabetes dietitian
Dietitian
Dietitians supervise the preparation and service of food, develop modified diets, participate in research, and educate individuals and groups on good nutritional habits. The goals of dietitians are to provide medical nutritional intervention, and to obtain, safely prepare, serve and advise on...

s today recommend the exchange scheme. Instead, they are likely to recommend a typical healthy diet: one high in fiber, with a variety of fruit and vegetables, and low in both sugar and fat, especially saturated fat. A diet that is high in plant fibre was recommended by James Anderson (Anderson & Ward, 1979; cited in Murray & Pizzorno, 1990).
This may be understood as continuation of the work of Denis Burkitt and Hugh Trowell on dietary fibre, which in turn, may be understood as a continuation of the work of Price (Murray & Pizzorno, 1990)

In 1976, Nathan Pritikin
Nathan Pritikin
Nathan Pritikin was an American nutritionist and longevity research pioneer.Pritikin was born and raised in Chicago, Illinois. He attended the University of Chicago from 1933 to 1935 but did not achieve a degree...

 opened a centre where patients were put on programme of diet and exercise (the Pritikin Program). This diet is high on carbohydrates and fibre, with fresh fruit, vegetables, and whole grains. A study at UCLA in 2005 showed that it brought dramatic improvement to a group of diabetics and pre-diabetics in only three weeks, so that about half no longer met the criteria for the disease.

On the other hand, in 1983, Dr Richard K. Bernstein
Richard K. Bernstein
Richard K. Bernstein, MD is a physician and an advocate for a low-carbohydrate diabetes diet to help achieve normal blood sugars for diabetics. Bernstein has type 1 diabetes. His private medical practice in Mamaroneck, New York is devoted solely to treating diabetes and prediabetes...

 began treating diabetics and pre-diabetics successfully with a very low carbohydrate diet, avoiding fruit, added sugar, and starch. Both the Pritikin approach and the Bernstein approach prescribe exercise.

Carbohydrates

The American Diabetes Association
American Diabetes Association
The American Diabetes Association is a United States-based association working to fight the consequences of diabetes, and to help those affected by diabetes...

 in 1994 recommended that 60–70% of caloric intake should be in the form of carbohydrate
Carbohydrate
A carbohydrate is an organic compound with the empirical formula ; that is, consists only of carbon, hydrogen, and oxygen, with a hydrogen:oxygen atom ratio of 2:1 . However, there are exceptions to this. One common example would be deoxyribose, a component of DNA, which has the empirical...

s. As mentioned above, this is controversial, with some researchers claiming that 40% or even less is better, while others claim benefits for a high-fiber, 75% carbohydrate diet.

An article summarizing the view of the American Diabetes Association
American Diabetes Association
The American Diabetes Association is a United States-based association working to fight the consequences of diabetes, and to help those affected by diabetes...

 contains the statement: "Sucrose-containing foods can be substituted for other carbohydrates in the meal plan or, if added to the meal plan, covered with insulin or other glucose-lowering medications. Care should be taken to avoid excess energy intake." Sucrose
Sucrose
Sucrose is the organic compound commonly known as table sugar and sometimes called saccharose. A white, odorless, crystalline powder with a sweet taste, it is best known for its role in human nutrition. The molecule is a disaccharide composed of glucose and fructose with the molecular formula...

 does not increase glycemia more than the same number of calories taken as starch
Starch
Starch or amylum is a carbohydrate consisting of a large number of glucose units joined together by glycosidic bonds. This polysaccharide is produced by all green plants as an energy store...

. It is not recommended to use fructose
Fructose
Fructose, or fruit sugar, is a simple monosaccharide found in many plants. It is one of the three dietary monosaccharides, along with glucose and galactose, that are absorbed directly into the bloodstream during digestion. Fructose was discovered by French chemist Augustin-Pierre Dubrunfaut in 1847...

 as a sweetener. Benefits may be obtained by consumption of dietary fibre in conjunction with carbohydrate; as Francis (1987) points out, evidence suggests that carbohydrate consumed with dietary fibre will have a less major impact on glycemic rise than the same amount of carbohydrate consumed alone.

What has not generally been included in diabetic diet recommendations is the variation in effect from different carbohydrates. It has been recommended that carbohydrates for diabetics should be complex carbohydrates
Complex carbohydrates
Complex carbohydrates may refer to:*oligosaccharides, a saccharide polymer containing a small number of component sugars...

.

Despite a common belief that table sugar contributes to the development of diabetes, it has medium (55–69) glycemic index
Glycemic index
The glycemic index, glycaemic index, or GI is a measure of the effects of carbohydrates on blood sugar levels. Carbohydrates that break down quickly during digestion and release glucose rapidly into the bloodstream have a high GI; carbohydrates that break down more slowly, releasing glucose more...

 that actually produces lower blood glucose levels than the same number of calories obtained from some other sources of carbohydrates. The Canadian Diabetes Association
Canadian Diabetes Association
The Canadian Diabetes Association is an organization based in Toronto, Ontario, Canada. Its mission is to lead the fight against diabetes mellitus by helping Canadians with diabetes live healthy lives while work is continued to find a cure...

 recommended that table sugar be included as part of the diabetes diet.

Low-carbohydrate alternatives

Some studies show that a low-carbohydrate diet
Low-carbohydrate diet
Low-carbohydrate diets or low-carb diets are dietary programs that restrict carbohydrate consumption usually for weight control or for the treatment of obesity. Foods high in digestible carbohydrates are limited or replaced with foods containing a higher percentage of proteins and fats...

 or low GI diet may be effective in dietary management of type 2 diabetes, as both approaches prevent blood sugars from spiking after eating.

Dr. Richard K. Bernstein
Richard K. Bernstein
Richard K. Bernstein, MD is a physician and an advocate for a low-carbohydrate diabetes diet to help achieve normal blood sugars for diabetics. Bernstein has type 1 diabetes. His private medical practice in Mamaroneck, New York is devoted solely to treating diabetes and prediabetes...

 is harshly critical of the standard American Diabetes Association
American Diabetes Association
The American Diabetes Association is a United States-based association working to fight the consequences of diabetes, and to help those affected by diabetes...

 diet plan. His plan includes very limited carbohydrate intake
Low-carbohydrate diet
Low-carbohydrate diets or low-carb diets are dietary programs that restrict carbohydrate consumption usually for weight control or for the treatment of obesity. Foods high in digestible carbohydrates are limited or replaced with foods containing a higher percentage of proteins and fats...

 (30 grams per day) along with frequent blood glucose monitoring, regular strenuous muscle-building exercise, and, for diabetics using insulin, frequent small insulin injections if needed. His treatment target is "near normal blood sugars" all the time.

Another critic of the ADA program is futurologist and transhumanist Ray Kurzweil, who together with Dr Terry Grossman co-authored Fantastic Voyage: Live Long Enough to Live Forever (published 2004). They describe the ADA guidelines as "completely ineffective". Their observations are that the condition, particularly in its early stages can be controlled through a diet which has sharply reduced carbohydrate consumption. Their guidelines for patients with type 2 diabetes is a diet that includes a reduction of carbohydrates to one sixth of total caloric intake and elimination of high glycemic load carbohydrates. As a previously diagnosed diabetic who no longer has symptoms of the disease, Kurzweil is a firm advocate of this approach. However, Kurzweil's prescription changed somewhat between his 1993 book The 10% Solution for a Healthy Life in which he recommended that only 10% of calories should come from fat, and Fantastic Voyage which recommends 25%.

Vegan/vegetarian

Based on the evidence that the incidence of diabetes is lower in vegetarians, some studies have investigated vegan interventions. These studies have shown that a vegan diet may be effective in managing type 2 diabetes. Switching diabetics to a vegan diet lowered hemoglobin A1C and LDL levels. A vegan diet may improve blood filterability. Vegan diets may lower advanced glycation endproducts.

Some of the protection that vegetarian diets provide may come from the diet's protection against obesity.

Diabetes U.K. state that diabetes should not prevent people from going vegetarian – in fact, it may be beneficial to diabetics to go vegetarian, as this will cut down on saturated fats. Recent evidence suggests that diabetics may benefit from as many as eight portions of fruit and vegetable a day.

Certain foods are considered particularly beneficial for diabetics, such as legumes,
nuts, fruits and vegetables; legumes, other vegetables and fruits are all considered beneficial due to their high levels of dietary fibre. (SOURCE:
http://www.symptomfind.com/nutrition-supplements/diabetes-nutrition-tips/)

Timing of meals

For people with diabetes, healthy eating is not simply a matter of "what one eats", but also when one eats. The question of how long before a meal one should inject insulin
Insulin
Insulin is a hormone central to regulating carbohydrate and fat metabolism in the body. Insulin causes cells in the liver, muscle, and fat tissue to take up glucose from the blood, storing it as glycogen in the liver and muscle....

 is asked in Sons ken, Fox and Judd (1998). The answer is that it depends upon the type of insulin one takes and whether it is long, medium or quick-acting insulin. If patients check their blood glucose at bedtime and find that it is low, it is advisable that they take some long-acting carbohydrate before retiring to bed to prevent night-time hypoglycemia
Hypoglycemia
Hypoglycemia or hypoglycæmia is the medical term for a state produced by a lower than normal level of blood glucose. The term literally means "under-sweet blood"...

.

Special diabetes products

Recently, Diabetes UK
Diabetes UK
Diabetes UK is a patient, healthcare professional and research charity dedicated to improving the lives of people with diabetes and to working towards a future without the chronic condition diabetes....

 have warned against purchase of products that are specially made for people with diabetes, on the grounds that:
  • They may be expensive,
  • They may contain high levels of fat
  • They may confer no special benefits to people who suffer from diabetes.


Research has shown the Maitake mushroom (Grifola frondosa) has a hypoglycemic
Blood sugar
The blood sugar concentration or blood glucose level is the amount of glucose present in the blood of a human or animal. Normally in mammals, the body maintains the blood glucose level at a reference range between about 3.6 and 5.8 mM , or 64.8 and 104.4 mg/dL...

 effect, and may be beneficial for the management of diabetes. The reason Maitake lowers blood sugar is because the mushroom naturally acts as an alpha glucosidase inhibitor. Other mushrooms like Reishi,
Agaricus blazei
Agaricus blazei
Agaricus subrufescens is a species of mushroom, commonly known as almond mushroom, mushroom of the sun, God's mushroom, mushroom of life, royal sun agaricus, jisongrong or himematsutake and by a number of other...

,
Agrocybe cylindracea
and Cordyceps
Cordyceps
Cordyceps is a genus of ascomycete fungi that includes about 400 described species. All Cordyceps species are endoparasitoids, mainly on insects and other arthropods ; a few are parasitic on other fungi. The best known species of the genus is Cordyceps sinensis, first recorded as yartsa gunbu in...

have been noted to lower blood sugar levels to a certain extent, although the mechanism is currently unknown.

Alcohol and drugs

Moderation is advised with regard to consuming alcohol and the use of some drugs. Alcohol inhibits glycogenesis
Glycogenesis
Glycogenesis is the process of glycogen synthesis, in which glucose molecules are added to chains of glycogen for storage. This process is activated during rest periods following the Cori cycle, in the liver, and also activated by insulin in response to high glucose levels, for example after a...

 in the liver and some drugs inhibit hunger symptoms. This, together with impaired judgment, memory and concentration caused by some drugs can lead to hypoglycemia
Hypoglycemia
Hypoglycemia or hypoglycæmia is the medical term for a state produced by a lower than normal level of blood glucose. The term literally means "under-sweet blood"...

.

Specific diets

The Pritikin Diet
Pritikin diet
The Pritikin Program for Diet and Exercise was created by Nathan Pritikin. The book based on the diet became a best-seller and was entitled "The Pritikin Program for Diet and Exercise."-Overview:...

consists of fruit, vegetables, whole grains, and so on, and is high in carbohydrates and roughage. The diet is accompanied by exercise.

G.I. Diet
G.I. Diet
The Low-Glycemic Index Diet was developed by Dr. David J. Jenkins, a professor of nutrition at the University of Toronto and later turned into a successful line of diet books by author and former president of the Heart and Stroke Foundation of Ontario, Rick Gallop. According to the publishing...

– lowering the glycemic index
Glycemic index
The glycemic index, glycaemic index, or GI is a measure of the effects of carbohydrates on blood sugar levels. Carbohydrates that break down quickly during digestion and release glucose rapidly into the bloodstream have a high GI; carbohydrates that break down more slowly, releasing glucose more...

 of one's diet can improve the control of diabetes. This includes avoidance of such foods as potatoes cooked in certain ways, and white bread, and instead favoring multi-grain and sourdough breads, legumes and whole grains—foods that are converted more slowly to glucose in the bloodstream.

Low Carb Diet – It has been suggested that the gradual removal of carbohydrates from the diet and replacement with fatty foods such as nuts, seeds, meats, fish, oils, eggs, avocados, olives, and vegetables may help reverse diabetes. Fats would become the primary calorie source for the body, and complications due to insulin resistance would be minimized. However, it's vitally important that such a diet be low in saturated fats.

High fiber diet – It has been shown that a high fiber
Dietary fiber
Dietary fiber, dietary fibre, or sometimes roughage is the indigestible portion of plant foods having two main components:* soluble fiber that is readily fermented in the colon into gases and physiologically active byproducts, and* insoluble fiber that is metabolically inert, absorbing water as it...

 diet works better than the diet recommended by the American Diabetes Association
American Diabetes Association
The American Diabetes Association is a United States-based association working to fight the consequences of diabetes, and to help those affected by diabetes...

 in controlling diabetes, and may control blood sugar levels with the same efficacy as oral diabetes drugs.

Paleolithic diet
Paleolithic diet
The modern dietary regimen known as the Paleolithic diet , also popularly referred to as the caveman diet, Stone Age diet and hunter-gatherer diet, is a nutritional plan based on the presumed ancient diet of wild plants and animals that various hominid species habitually consumed during the...

– The Paleolithic diet has been shown to improve glucose tolerance in humans with diabetes type 2, humans with ischemic heart disease and glucose intolerance, and in healthy pigs. These are a limited number of studies in a limited number of subjects, but the knowledge about the benefits of the Paleolithic diet in diabetes is emerging. The scientific foundation for the Paleolithic diet and the relationship between what humans eat and diseases of the western world (including diabetes, hypertension
Hypertension
Hypertension or high blood pressure is a cardiac chronic medical condition in which the systemic arterial blood pressure is elevated. What that means is that the heart is having to work harder than it should to pump the blood around the body. Blood pressure involves two measurements, systolic and...

, obesity
Obesity
Obesity is a medical condition in which excess body fat has accumulated to the extent that it may have an adverse effect on health, leading to reduced life expectancy and/or increased health problems...

, ischemic heart disease, stroke
Stroke
A stroke, previously known medically as a cerebrovascular accident , is the rapidly developing loss of brain function due to disturbance in the blood supply to the brain. This can be due to ischemia caused by blockage , or a hemorrhage...

) is the subject of a comprehensive textbook, which is geared towards both professionals and interested laypeople alike, and which spans over 2000 references.
  • Vegan diet – A low-fat vegan diet improves glycemic control similar to the ADA diet.

See also

  • Diabetes management
    Diabetes management
    Diabetes is a chronic disease with no proven cures but a lot of research is underway. It is associated with an impaired glucose cycle that alters the patient's metabolism. Management of this disease may include carefully managing diet, exercising, taking oral diabetes medication, using some form...

  • Diabetic diet (low-carb)
  • Glycemic index
    Glycemic index
    The glycemic index, glycaemic index, or GI is a measure of the effects of carbohydrates on blood sugar levels. Carbohydrates that break down quickly during digestion and release glucose rapidly into the bloodstream have a high GI; carbohydrates that break down more slowly, releasing glucose more...

  • Low GI Diet
  • Low-carbohydrate diet
    Low-carbohydrate diet
    Low-carbohydrate diets or low-carb diets are dietary programs that restrict carbohydrate consumption usually for weight control or for the treatment of obesity. Foods high in digestible carbohydrates are limited or replaced with foods containing a higher percentage of proteins and fats...

  • National Institutes of Health
    National Institutes of Health
    The National Institutes of Health are an agency of the United States Department of Health and Human Services and are the primary agency of the United States government responsible for biomedical and health-related research. Its science and engineering counterpart is the National Science Foundation...


Further reading

  • Murray, M. & Pizzorno, J. (1990). Encyclopaedia of Natural Medicine. London: Littlebrown and Company. ISBN 1-85605-498-5
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