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The Standard of World Meal Intake for Fat and Carbohydrate has Changed

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  • Editorial   
  • Clin Med Case Rep 2018, Vol 1(1): e101

The Standard of World Meal Intake for Fat and Carbohydrate has Changed

Hiroshi Bando*
Medical Research, Tokushima University, Tokushima, Japan
*Corresponding Author: Hiroshi Bando, Medical Research, Tokushima University, Nakashowa 1-61, Tokushima 770-0943, Japan, Tel: +81-90-3187-2485, Fax: +81-88-603-1030, Email: [email protected]

Received Date: Sep 25, 2017 / Accepted Date: Sep 28, 2017 / Published Date: Oct 07, 2017

Introduction

The standard nutrition has been changed in several decades. From mid-20th century, it has been believed that abstinence of lipids would prevent arteriosclerosis. One of the source would be from classical Seven Countries study [1]. At that time, fatal diseases were classified such as all causes, all causes less infective and parasitic diseases and violence, diseases of the circulatory system and degenerative heart disease [2].

There was a correlation between mortality rate from degenerative heart disease and fat intake ratio as percent of total [1]. It was significant linear correlation: 1) highest country is USA with 7.0 in deaths at 1000 and 40% in fat intake ratio, 2) lowest country is Japan with 0.6 in death/1000 and 7% in fat intake, 3) Canada, Australia, England and Italy were linearly situated between USA and Japan.

In the 1970s, exceptionally high mortality rates of cardiovascular disease (CVD) was observed in Finland, and they started the health program. It concentrated heavily on changing the population’s diet, especially with respect to the quality of the fat consumed: a reduction in saturated and an increase in unsaturated fat intake [3]. It showed both the feasibility and great potential of CVD prevention and heart health promotion through general dietary changes in the population [4].

After that, there have been lots of nutritional research worldwide concerning the ratio of three major nutrients, influence to cardiovascular disease, saturated and unsaturated fatty acid. High saturated fatty acid diet was supposed to be related to influence the development of cardiovascular disease.

Recently, it has been reported that saturated fatty acids and lipids does not affect the mortality rate or cardiovascular disease incidence rate, as well as the converse reports that the risk decreases [5,6]. There is no significant evidence for concluding that dietary saturated fat is associated with an increased risk of CVD or coronary heart disease (CHD) with 5-23 year follow-up of 347,747 subjects, 11,006 developed CHD or stroke [5]. However, further data would be necessary for the rejecting the saturated fat hypothesis [6,7].

There has been a large-scale epidemiological study, which is called “The Prospective Urban Rural Epidemiology (PURE) study” [8]. It plans to recruit approximately 140,000 individuals residing in >600 communities in 17 low-, middle-, and high-income countries around the world [8].

As one of PURE study, the consumption of fruit and vegetables was investigated [9]. Consumption is rather low worldwide, particularly in low-income countries, and this is associated with low affordability. Policies worldwide should enhance the availability and affordability of fruits and vegetables.

In 2017, another PURE study was reported [10]. They studied 125 287 participants from 18 countries in North America, South America, Europe, Africa, and Asia, and reported that replacement of saturated fatty acids with carbohydrates was associated with the most adverse effects on lipids, whereas replacement of saturated fatty acids with unsaturated fats improved some risk markers [10].

Furthermore, associations of fats and carbohydrate intake with cardiovascular disease and mortality in 18 countries were reported [11]. It showed that higher carbohydrate intake was associated with an increased risk of total mortality (HR 1.28). On contrast, it showed that higher total fat was associated with lower total mortality (HR 0.77) and higher saturated fat intake was associated with lower risk of stroke (HR 0.79). Total fat and saturated and unsaturated fats were not significantly associated with risk of myocardial infarction or cardiovascular disease mortality.

According to these data, lower intake of carbohydrate about 50-55% and higher intake of fat about 35% were recommended [11]. However, enough amount of protein would be necessary. Then, we suggest that less carbohydrate would be better for healthier life with adequate balance of 3 nutrients.

In many countries and districts, the ratio of carbohydrate intake has seems to be around 50 – 70%. According to the data [10], the ratio less than 50% and more than 70% is shown in the following district: China, 5.5%, 42.6%; South Asia, 7.7%, 33.2%; Africa, 12.3%, 28.9%; South America, 25.5%, 14.5%; Middle East, 29.3%, 0.9%; Europe and north America, 39.7%, 1.5%, respectively [10].

Furthermore, higher economic state tends to indicate higher fat intake, lower carbohydrate intake and better medical circumstance, which would be the limitation of various research. Consequently, we have to consider multiple axes in discussing the ideal or adequate ratio of fat and carbohydrate in various situations worldwide.

Taking several data with cultural, historical and economic situation into consideration, it is rather difficult to propose the ideal proportion of three main nutrients. However, we expect the accumulation of significant nutritional reports about better meal components in the world, leading to less metabolic syndrome and arteriosclerosis.

In relation to these comment mentioned above, recent clinical and research concerning low carbohydrate diet (LCD) must be considered. Atkins and Bernstein started LCD with successful weight reduction in Europe and North American [12,13]. There was Dietary Intervention Randomized Controlled Trial (DIRECT) study, in which weight reduction was investigated in low fat, Mediterranean and LCD for 2 years [14]. The mean weight losses were 3.3 kg, 4.6 kg, and 5.5 kg, respectively. This is the milestone of the beneficial effects for LCD [14].

On succession, the efficacy of LCD for 6 years in DIRECT study was reported [15]. There have been various reports and discussion concerning the comparison between calorie restriction (CR) and LCD [16,17]. Furthermore, the influences of LCD for arteriosclerosis and cardiovascular disease were investigated [18-21].

As for Japan, authors and colleagues have started LCD and reported clinical studies including 2699 cases of LCD with remarkable weight reduction [22,23]. We also clarified that diabetic pregnant women can be treated successfully with LCD, and that remarkable elevated ketone bodies were observed in the axes of fetus, placenta, newborn and mother, suggesting that ketone bodies would generate necessary energy in the axes [24].

In the clinical practice, the remarkable beneficial efficacy for LCD would be 1) successful weight reduction [23]. 2) elevated ketone bodies with various beneficial effects to human organs [23,25,26], 3) three different LCD meals which are petit LCD, standard LCD and super LCD with carbohydrate ratio in 40%, 26%, 12%, respectively [27], 4) decrease of triglyceride level [28], 5) rapid decrease of daily profile of blood glucose which can be calculated as Morbus (M) value indicating average and fluctuation of glucose in a day [29].

This editorial was on the topics of the ratio for fat, carbohydrate, LCD in various meal and nutritional treatment. These speculations would be useful for the urgent problem worldwide, which is increasing metabolic syndrome (Met-S) such as obesity and diabetes [30]. International Diabetes Federation (IDF) summarized the current situation and problems in the world [31]. Diabetic prevalence will increase from 8.8% in 2015 to 10.4% in 2040 [32].

IDF summarized Standards of Medical Care in Diabetes in 2015 [33]. The important points were that 1) Monitoring carbohydrate intake, whether by carbohydrate counting or experience-based estimation, remains critical in achieving glycemic control in eating patterns and macronutrient distribution, and 2) the amount of dietary saturated fat, cholesterol, and trans fat recommended for people with diabetes is the same as that recommended for the general population in dietary fat.

In summary, to prevent and treat arteriosclerosis and Met-S worldwide, we can apply adequate nutritional management such as less carbohydrate and enough fat with good quality.

References

Citation: Bando H (2017) The Standard of World Meal Intake for Fat and Carbohydrate has Changed. Clin Med Case Rep 1: e101.

Copyright: © 2017 Bando H. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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