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Dietary Reference Intakes for Protein: Protein Requirement and Estimation Method, AMDR (Amount of Macronutrient Distribution Range), for Protein.

Soon Ok CHANG

The Korean Journal of Nutrition.2011;44(4):338-343. doi:10.4163/kjn.2011.44.4.338

This study assessed the current EAR, RDA, and AMDR for protein, which were set in 2005 and revised in 2010 as the DRIs for Koreans. A classical approach to establish the EAR for protein has been the nitrogen balance method. This method has practical limitations and problems in statistical analysis by giving over estimations of nitrogen balance. Thus, the present EAR for protein might be lower than the true requirement. Recent reevaluations of nitrogen balance studies by bilinear regression analysis and the IAAO method have indicated that the EAR of 0.66 g/kg bw/d should be increased by 39% to give 0.92 g/kg bw/d. The AMDR for protein in the Korean DRIs was set at 7-10%, which covers almost the entire population's protein intake. Since the 5th percentile of Korean protein intake is close to 10% of energy and due to the beneficial effects of protein beyond the maintenance of nitrogen equilibrium, the lower range of 7% needs to be increased up to 10%. For practical meal arrangement, 15% of energy as protein, which is close to the average protein intake of Koreans, seems to be proper, although the value is almost two times the EAR.
Ear ; Meals ; Nitrogen ; Nutrition Policy

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Analysis of Intakes and Satisfaction of Patient Foodservice in Mid-Sized Hospital Settings.

Ji Myung KIM ; Bok Hee KANG

The Korean Journal of Nutrition.2011;44(4):326-337. doi:10.4163/kjn.2011.44.4.326

The purpose of this study was to investigate dietary intake and to evaluate patient satisfaction toward the quality of hospital foodservice. Questionnaires were distributed to 203 hospitalized patients in 3 hospitals having 300 beds. The intake rates for served amounts of rice, side dishes, and soup were 72.5%, 68.2%, and 62.6%, respectively. The main reasons for left-overs were 'no appetite' (25.8%) and 'not salty enough' (19.9%). The rate of patients eating outside food was about 33.5%. The average score for quality satisfaction of meal characteristics was 3.34 +/- 0.61, and the average score for quality satisfaction of sanitation and service characteristics was 3.58 +/- 0.61. 'Seasoning' showed the lowest score and 'temperature' showed the highest score for quality satisfaction of meal characteristics. In the quality satisfaction of sanitation and services, 'explanation of meals' showed the lowest score and 'exactness of meal times' showed the highest score. The patients hospitalized for 10 days showed significantly lower average scores than those hospitalized over 60 days for quality satisfaction of meal characteristics. The patients with 'little appetite' and 'regular appetite' showed significantly lower average scores than those with 'much appetite' for the quality satisfaction of meal, sanitation, and service characteristics. The patients who 'rarely had leftovers' showed significantly higher average scores than those who 'always had leftovers' and 'often had leftovers' for quality satisfaction of meal characteristics. Meal characteristic scores were significantly correlated with age (r = 0.216), length of admission (r = 0.310), appetite (r = 0.251), leftovers (r = 0.233), and intake of soup (r = 0.205). Also, sanitation and service characteristics scores were significantly correlated with age (r = 0.327), education (r = -0.202), length of admission (r = 0.168), and appetite (r = 0.155). Thus, it would seem to be desirable that hospital foodservices improve the taste and seasoning of meals and provide appropriate nutrition education and counseling in mid-sized hospitals.
Appetite ; Counseling ; Humans ; Meals ; Patient Satisfaction ; Surveys and Questionnaires ; Sanitation ; Seasons

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Assessment of Selenium Status in Adult Females According to Life Cycle.

Okhee LEE ; Jongwha MOON ; Yongsam CHUNG

The Korean Journal of Nutrition.2003;36(5):491-499.

Selenium is a strong antioxidant trace mineral, scavenging free radicals. The prevalence of chronic degenerative diseases is increasing in Korean adults with increasing age. The increased cell damage from free radicals has been implicated in the etiology of these diseases, and evidence is accumulating that the low selenium status that comes with advanced aged is involved in the prevalence of age-associated diseases. However, little is known about the selenium status of Koreans, its age-related change and its relationship to dietary nutrient intake. In this study, the serum selenium levels of healthy adult females according to life cycle and its association with blood albumin levels and nutrient intake were examined. Serum selenium level was measured with the Huwo research reactor using the neutron activation analysis method (NAA). The overall proportion of women with selenium deficiency, serum selenium concentrations below 7.0 microgram/dl, was 9.4%. The average serum selenium levels were 12.39 microgram/dl, 9.45 microgram/dl and 9.16 microgram/dl in the young adult, middle-aged and elderly groups, respectively, showing a reduction of selenium status with advancing age. Selenium deficiency was seen only in the elderly group. Generally, serum selenium levels positively or negatively correlated with nutrient intake, but these association patterns differed depending on the age. The nutrients that showed positive correlations with selenium levels were proteins and phosphate in the young adult group (p<0.05, p<0.05), and total calcium, potassium and vegetable-origin calcium in the middle-aged group. Vitamin C and fiber were the negative correlated nutrients with serum selenium levels in the elderly group (p<0.05, p<0.05). Multiple stepwise regression analysis of the determining factors responsible for selenium status showed that age and serum albumin levels were important factors which explained up to 26.9% variances in serum selenium levels. The average selenium concentrations of Korean adult female subjects were above the deficiency levels in all three age groups. There was a tendency toward decreasing selenium levels as the age of the subjects increased. The factors with the strongest in-fluence on selenium status in healthy adult Korean females were age and serum protein status.
Adult* ; Aged ; Ascorbic Acid ; Calcium ; Female* ; Free Radicals ; Humans ; Life Cycle Stages* ; Neutron Activation Analysis ; Potassium ; Prevalence ; Selenium* ; Serum Albumin ; Young Adult

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Development of a Sensory Education Textbook and Teaching Guidebook for Preference Improvement toward Traditional Korean Foods in Schoolchildren.

Taejung WOO ; Kyung Hea LEE

The Korean Journal of Nutrition.2011;44(4):303-311. doi:10.4163/kjn.2011.44.4.303

The purpose of this study was to develop a textbook and teaching guidebook on sensory education for lower grade students at elementary schools. The goal of sensory education was to improve preferences for traditional Korean foods. An advisory committee was organized that was composed of 8 professionals in the education field, in order to discuss the adequacy and validity of the textbook's content. The textbook's units consisted of three parts composed of the following: 'feel by the five senses' (2 lessons), 'enjoying traditional Korean foods' (9 lessons), and 'eating together' (1 lesson). The lesson activities were based on experiential learning. The teacher's guidebook contained an overview of the education process, with specific information and practical guidelines for each lesson. Ninety-seven children in 3rd grade from one school participated in a pilot lesson, which evaluated the educational effects and satisfaction. After the lesson, the children had improved preferences for foods which were taught about in the class, along with better eating attitudes. These results reflect that the developed materials were suitable for improving children's preferences toward traditional Korean foods.
Advisory Committees ; Child ; Eating ; Humans ; Problem-Based Learning

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Conceptualizing and Prospecting for Home Meal Replacement (HMR) in Korea by Delphi Technique.

Hae Young LEE ; Lana CHUNG ; Ilsun YANG

The Korean Journal of Nutrition.2005;38(3):251-258.

The purposes of this study were to conceptualize the Home Meal Replacement (HMR) in Korea and to gather professionals' opinions of prospect and task for HMR industry in Korea. A total of 67 experts participated in a three round survey by Delphi technique, which was used to integrate and share the each expert's professional idea. According to the result, HMR was translated into 'Gajeongsiksa daeyongsik' in Korean and given definition to 'a meal taken directly or through brief cooking process at home by purchasing ready to eat or ready to end-cook type of food'. As the result of categorizing HMR products of Korean food, 'I. Ready to eat' such as side dishes, kimchi, salad, sandwich, kimbab, and so on and 'II. Ready to heat' such as rice, porridge, retort food (soup, broth, curry, spaghetti, etc.), frozen pizza, grilled food, jabchae, instant soup, and so on were construed in a limited sense of the HMR. In addition, 'III. Ready to end-cook' such as frozen dumpling, frozen pork cutlet, seasoned meat, powder-type soup, and so on as well as these two kinds were interpreted in a broad sense of the HMR. In the prospect of HMR industry in Korea, the Korean HMR industry would develop continuously accompanied by increasing of consumers using HMR products. Introduction and generalization of HMRs would serve the convenience for meal preparation and then influence the change of home meal pattern. Nevertheless, it was concerned about that using HMRs might have limitation on solving the problems of dietary life including irregular meal, skipping a meal, and so on and influence the nutrition imbalance. For the development of HMRs, developing various menu and the packaging materials for HMR products, constructing the thorough sanitary management, and strengthening R & D for the HMR of Korean food were the future tasks in Korean HMR industry.
Cooking ; Delphi Technique* ; Generalization (Psychology) ; Korea* ; Meals* ; Meat ; Product Packaging ; Seasons

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A Study on Kindergarten's Meal Service Program and Children's Food Intake.

Youngmee LEE ; Yu Jin OH

The Korean Journal of Nutrition.2005;38(3):232-241.

Today, the role of kindergarten is more important as nutrition provider through snack and meal services. Desirable kinds and amounts of food items at school lunch menu were important factors of nutrients intakes in children. This study was performed to assess the kindergarten's meal service program (snack and lunch) and the consumption amount of lunch according to each dishes. Twenty four institutions that cared over one hundred children were observed at Seoul and Kyunggido area. Well-trained observers checked meal and snack serving activity and foodservice facilities by formal checklist. And using the weighing method assessed the consumption levels of food items at lunch. During 3 days, 30 children in each kindergarten were selected randomly according to age, observers measured serving and residual weight of each food. The data was compiles by performing ANOVA-test using SPSS WIN 10.0. The result were as follows: 1) Foodservice facilities in kindergarten was limited to provide qualified foodservice. 91.7% of institution had kitchen, 41.7% had dinning. The kitchen equipment possession rate was 12.5% (oven), 30.8% (heating cabinet), 58.3% (refrigerator). The rate of using document about foodservice was used 83.3% (menu list), 41.7% (daily foodservice record), 25% (standard recipe). 41.7% of institution employed licensed dietitian. Only 41.7% of subjects preserved meal after daily meal service. 2) Meal serving size was decided by teacher, 54.5% at snack and 43% at lunch and pre-divided individual portion type was 36.4% at snack and 28.6% at lunch. The rate of cleaning activity before meal was 72.2% at snack, 90.5% at lunch. And nutrition or sanitation education activity was more performed at lunch time, for examples brushing teeth activity was 12.5% at snack 85.7% at lunch. 3) The consumption amounts of plain cooked rice was 112.7 +/- 26.1 g, cooked rice and cereal was 93.06 +/- 27.97 g, curry rice was 208.35 +/- 64.84 g and the consumption amounts of these main dishes was significantly different by age (p < 0.001). The consumption amounts of soup was very different according to children's preference. The consumption amounts of seaweed soup was 120.18 +/- 82.13 g, wild sesame and bean-paste soup was 40.64 +/- 23.16 g. The consumption range of kimchis was from 6 g to 13 g, jorim (braised food) was from 3 g to 25 g, fried food (include stir fried, deep fat fried, pan fried) was from 14.5 g to 22 g, vegetable dish was from 3 g to 16 g. These consumption amount of each dishes was not reached recommended portion size of nutritionally planning menu by nutritionist.
Checklist ; Child ; Eating* ; Education ; Edible Grain ; Gyeonggi-do ; Humans ; Lunch ; Meals* ; Nutritionists ; Portion Size ; Sanitation ; Seaweed ; Seoul ; Serving Size ; Sesamum ; Snacks ; Tooth ; Vegetables

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The Monitoring of Information about Food and Nutrition Presented Throughout Various Television Brodeast Media.

Hea Sook RYU ; Il Sun YANG ; Hyun Sook KIM

The Korean Journal of Nutrition.2003;36(5):508-514.

The purpose of this study was to analyze information about food and nutrition presented through the television broadcast media, with the aim of finding out the optimal communication method for supplying the general public with accurate information. To perform this study, a total of sixteen monitoring people were recruited and trained before and during the study. Five domestic TV channels were selected to be monitored, and the total monitoring period was six months. For maximum efficiency, the monitoring people were assigned to 8 teams. The results of the present study can be summarized as follows : First, the total reported cases of information about food and nutrition were 237, of which about 30% were judged appropriate and 70% as inappropriate. Second, classifying each case by program type, information programs made up the highest portion at 82 cases (34.6%), cooking programs accounted for 76 cases (32.1%), news programs for 40 cases (16.9%), and entertainment programs for 7 cases (3.0%). The analysis showed that the greatest amount of incorrect information was found in dramas, followed by entertainment, information, cooking and news programs. Third, classifying each case by theme of contents monitored, meal preparation and cookery made up the highest portion at 86 cases (36.3%), foods accounted for 67 cases (28.3%), disease and diet-therapy for 40 cases (16.9%), eating habits for 31 cases (13.1%), and diet and fitness for 13 cases (5.5%). Incorrect information was conveyed most often on the themes of food habits, foods, disease and diet-therapy, cookery, and diet and fitness. Fourth, classifying each case by channel, Cable TV had the highest frequency at 72 cases (30.4%), MBC had 51 cases (21.5%), SBS had 43 cases (18.1%), KBS1 had 41 cases (17.3%) and KBS2 had 30 cases (12.7%). In conclusion, systematic monitoring should be continued to reduce the frequency of incorrect information being broadcast and to help ensure that accurate information is conveyed to the general public. Moreover, there should be a system of cooperation to provide information to help broadcast production teams establish a strategic program. Finally, it is essential to organize an advisory team by promoting links between the mass media and specialists in the field, and to develop an educational program on nutrition to help ensure the communication of accurate information on food and nutrition.
Cooking ; Diet ; Drama ; Eating ; Food Habits ; Mass Media ; Meals ; Specialization ; Television*

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The Effects of 12-Weeks Intensive Intervention Program on Cardiovascular Risk Factors, Adipocytokines and Nutrients Intakes in Industrial Male Workers.

Kieun MOON ; Ill Keun PARK ; Yeon Sang JO ; Yun Kyun CHANG ; Yun Mi PAEK ; Tae In CHOI

The Korean Journal of Nutrition.2011;44(4):292-302. doi:10.4163/kjn.2011.44.4.292

Adipocytokines (adiponectin, leptin and resistin) are known to play a major role in development of cardiovascular disease (CVD) and intervention program is effective in reducing CVD risk factors. However, intervention program to improve the CVD risk factors including adipocytokines has been less studied. This study investigated the effects of 12-weeks worksite intervention program on cardiovascular risk factors, adipocytokines and nutrients intakes in industrial workers. 157 industrial male workers (32 metabolic syndrome (MS) subjects, 125 healthy subjects using age-matched stratified random sampling) received 5 face-to-face counseling based on their health profiles. Anthropometry, biochemical parameters and nutrients intakes were measured. The diagnosis of MS was adapted from modified NCEP-ATP III criteria (2001) and Asia-Pacific definition criteria (2000) for waist circumference (WC). After the intervention program, WC, BMI, SBP, insulin, leptin and intakes of total energy and fiber were significantly decreased (p < 0.05), while adiponectin was significantly increased (p < 0.05) in MS subjects. The WC, BMI, SBP, total cholesterol, LDL and HDL-cholesterol, HbA1c, leptin and intakes of total energy, protein and fat were significantly decreased (p < 0.05) and adiponectin was significantly increased (p < 0.05) in normal subjects. Multiple linear regression revealed that adiponectin was positively correlated with HDL-cholesterol (p < 0.01). Leptin was positively correlated with WC (p < 0.01), and resistin was positively correlated with HbA1c (p < 0.05) and intakes of total energy (p < 0.05), and negatively correlated with HDL-cholesterol (p < 0.05). The results of the 12 weeks intervention showed a positive impact on adipocytokines and nutrients intakes of industrial workers to reduce cardiovascular risk factors. Further research is needed to verify a tailored long-term worksite intervention program including adipocytokines as a protective factor for the CVD.
Adipokines ; Adiponectin ; Anthropometry ; Cardiovascular Diseases ; Cholesterol, LDL ; Counseling ; Humans ; Insulin ; Leptin ; Linear Models ; Male ; Resistin ; Risk Factors ; Waist Circumference ; Workplace

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Effects of Water Extracts of Red Pepper Seeds Powder on Antioxidative Enzyme Activities and Oxidative Damage in Rats Fed High-Fat and High-Cholesterol Diets.

Yu Na KIM ; Kyung Hyung KU ; Sin Kwon KANG ; Jeong Hwa CHOI

The Korean Journal of Nutrition.2011;44(4):284-291. doi:10.4163/kjn.2011.44.4.284

The purpose of the present study was to examine the effects of water extracts from red pepper seeds powder on antioxidative enzyme activities and oxidative damage in groups of rrats fed high-fat and high-cholesterol diets group (HFC). The Rrats were divided into the following five experimental groups which are : composed ofa normal diet group, a high fat.high cholesterol diet group, and a high fat.high cholesterol diet group supplemented with different amounts contents (1%, 2% and 4%) of red pepper seeds powder water extracts supplemented groups (HFCW1, HFCW2 and HFCW4, respectively). Body weight gains and food intake were lower ofin the red pepper seed water extracts groups were lower than those inof the HFC group. Hepartic xanthine oxidase (XOD) activity was decreased in the HFCW2 and HFCW4 groups compared to the HFC group. Hepartic glutathione peroxidase (GSH-px) activitiyactivity was increased in the HFCW4 group compared to the HFC group. Hepatic superoxide radicals within the mitochondria and microsomes of cells were significantly reduced in the HFCW2 and HFCW4 groups compared to the HFC group. Hepartic hydrogen peroxide in the cytosol was significantly reduced in the HFCW3 and HFCW4 groups compared to the HFC group. Hepatic carbonyl values in the microsomes and mitochondria were significantly reduced in the HFCW4 group compared to the HFC group. Hepartic thiobarbituric acid reaction substance (TBARS) activity was decreased in the HFCW2 group compared to the HFC group. These results suggest that water extracts of red pepper seeds powder may reduce oxidative damage by activation of antioxidative defense systems in rats fed high fat.high cholesterol diets.
Animals ; Body Weight ; Capsicum ; Cholesterol ; Cytosol ; Diet ; Eating ; Glutathione Peroxidase ; Hydrogen Peroxide ; Microsomes ; Mitochondria ; Rats ; Seeds ; Superoxides ; Thiobarbiturates ; Water ; Xanthine Oxidase

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Effects of Phytoestrogens on Glucose Metabolism in C57BL/KsOlaHsd-db/db Mice.

Bo Hyeon SEO ; Kwang Ok KIM ; Ji Hye LEE ; Hye Sung LEE

The Korean Journal of Nutrition.2011;44(4):275-283. doi:10.4163/kjn.2011.44.4.275

This study was conducted to evaluate the antihyperglycemic effects of three phytoestrogens, genistein, coumestrol, and enterolactone, in type 2 diabetic animals. Forty male C57BL/KsOlaHsd-db/db mice were used as a diabetic animal model. The animals were divided into four groups and fed a phytoestrogen-free AIN-76 diet (control), or one of three phytoestrogen-supplemented (3.75 mg/100 g diet) AIN-76 diets for six weeks. During the experimental period, fasting blood glucose levels were measured on week 0, 2, 5, and 6 of the experiment, and oral glucose tolerance tests were performed on the 5th week. After the experimental period, blood concentrations of HbA1c, insulin, and glucagon were measured, and hepatic glycogen content and glucose regulating enzyme activities were analyzed. Fasting blood glucose, HbA1c level, and the area under the blood glucose curve in the oral glucose tolerance test were significantly lower in all of the phytoestrogen-supplemented groups compared to the control group. Plasma glucagon levels were also significantly lower in all of the phytoestrogen-supplemented groups compared to the control group. Hepatic glycogen level was significantly higher in the coumestrol-supplemented group compared to the other groups. However, there were no significant differences in the activities of glucokinase and glucose-6-phosphatase between the groups. These results suggest that all of the three major phytoestrogens tested in the present study were effective in lowering blood glucose levels in type 2 diabetic animals. However, further studies need to be conducted to elucidate the exact mechanism for the hypoglycemic effects of phytoestrogens.
4-Butyrolactone ; Animals ; Blood Glucose ; Coumestrol ; Diet ; Fasting ; Genistein ; Glucagon ; Glucokinase ; Glucose ; Glucose Tolerance Test ; Glucose-6-Phosphatase ; Humans ; Hypoglycemic Agents ; Insulin ; Lignans ; Liver Glycogen ; Male ; Mice ; Models, Animal ; Phytoestrogens ; Plasma

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