• 식품과학과 산업
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• 제49권2호
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• pp.8-17
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• 2016

Sodium is a component of salt and naturally taken in the process of taking in table salt. For food processing, salt is very important. In general, salt adds flavor and taste including a salty taste and rheologically, it plays an important role in forming tissues. Also, it helps in improving preservability of food by controling growth of microorganisms. But excessive intake of salt has been blamed for outbreak of high blood pressure, heart disease, stroke, osteoporosis, kidney stone, stomach cancer and others. For this reason, there are active efforts to reduce sodium of processed foods all around the world. In Korea, a guideline for sodium reduction in 27 items and 44 kinds of foods including confectionery was suggested as part of the 'processed food sodium reduction guideline development project', which has been conducted since 2012.

• Nutrition Research and Practice
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• 제16권sup1호
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• pp.70-88
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• 2022

Sodium is a physiologically essential nutrient, but excessive intake is linked to the increased risk of various chronic diseases, particularly cardiovascular. It is, therefore, necessary to accomplish an evidence-based approach and establish the Korean Dietary Reference Intakes (KDRIs) index, to identify both the nutritional adequacy and health effects of sodium. This review presents the rationale for and the process of revising the KDRIs for sodium and, more importantly, establishing the sodium Chronic Disease Risk Reduction Intake (CDRR) level, which is a new specific set of values for chronic disease risk reduction. To establish the 2020 KDRIs for dietary sodium, the committee conducted a systematic literature review of the intake-response relationships between the selected indicators for sodium levels and human chronic diseases. In this review, 43 studies published from January 2014 to December 2018, using databases of PubMed and Web of Science, were finally included for evaluating the risk of bias and strength of evidence (SoE). We determined that SoE of the relationship between dietary sodium and cardiovascular diseases, cerebrovascular disease, and hypertension, was moderate to strong. However, due to insufficient scientific evidence, we were unable to establish the estimated average requirement and the recommended nutrient intake for dietary sodium. Therefore, the adequate intake of sodium for adults was established to be 1,500 mg/day, whereas the CDRR for dietary sodium was established at 2,300 mg/day for adults. Intake goal for dietary sodium established in the 2015 KDRIs instead of the tolerable upper intake level was not presented in the 2020 KDRIs. For the next revision of the KDRIs, there is a requirement to pursue further studies on nutritional adequacy and toxicity of dietary sodium, and their associations with chronic disease endpoint in the Korean population.

• Journal of Nutrition and Health
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• 제53권6호
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• pp.648-662
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• 2020

국내 나트륨 평균 섭취량은 2017년 3,477 mg으로 2010년 4,876 mg 대비 71.3% 수준으로 감소하였다. 나트륨 섭취량 감소 추이에서 생산 및 조리 주체별 구분에 따른 기여도에서는 산업체에서 생산된 식품과 가정에서 조리한 식품으로부터의 나트륨 섭취량 감소 비율이 단체급식과 외식업체에서 조리하여 제공하는 식품으로부터의 나트륨 섭취량 감소 비율보다 컸다. 식품군과 음식군으로부터 나트륨에 가장 많이 기여하는 요인은 생산 및 조리 주체별로 다르게 나타났는데, 산업체 생산에서는 김치류에서, 가정과 단체급식에서는 조리한 국/탕/찌개/전골류에서, 외식업체에서는 조리한 면/만두류였고, 나트륨 기여도가 가장 높았던 이들 식품 및 음식들은 연도에 따른 나트륨 섭취량 감소 폭도 가장 큰 것으로 나타났다. 특히 가정에서 조리한 국/탕/찌개/전골류와 면/만두류의 나트륨 함량 감소 폭은 외식업체 및 단체급식에서 조리한 음식보다 더 큰 것으로 나타났다. 나트륨 섭취량에 주로 기여하는 주요 식품군과 음식군의 종류는 연도가 증가함에 따라 나트륨 급원 식품이 특정 식품 위주에서 다양한 식품으로 확대되는 경향을 보여, 향후 나트륨 저감 대상 품목에 대한 다양한 접근이 요구됨을 시시하였다. 국내 나트륨 섭취에 기여하는 식품은 가공식품을 완제품 형태로 섭취하는 것 외에도 조리 단계에서 식재료로 다양하게 사용하는 비율이 높으므로 본 연구에서 제안한 생산 및 조리 주체별로 식품군 또는 음식군을 분류하여 나트륨 섭취 주요 급원 및 감소 요인을 파악한 결과는 저염 식품의 개발 및 생산, 저염 섭취와 관련된 식생활 교육 등과 같은 분야의 기초 자료로 활용될 것으로 기대된다. 향후 식문화를 고려한 다양한 식품 분류체계 방법을 마련하여 나트륨 섭취량 분석 및 저감 전략 수립에 활용하는 것이 필요할 것으로 생각된다.

• 한국식품조리과학회지
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• 제31권2호
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• pp.225-232
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• 2015

The objective of this study was to expand sodium reduction practices by analyzing the awareness, practice, and obstruction of sodium reduction by middle school dietitians. Questionnaires were administered to 146 dietitians in the Busan area. The average score for the dietitians' awareness of low-sodium diets was 4.21/5.00, and dietitians in their 30s and over 40 reported significantly (p<0.05) higher awareness than those in their 20s The average practice scores for low-sodium diets was 3.74/5.00, 3.80/5.00 for cooking, 3.77/5.00 for food choice, and 3.60/5.00 for action. The average scores of obstruction for low-sodium diets was 3.58/5.00, 3.93/5.00 for low-sodium products, 3.88/5.00 for students, 3.71/5.00 for dietitians, 3.12/5.00 for facilities, 2.86/5.00 for cooks. Dietitians over 40 and those with graduate school degrees had significantly (p<0.05) higher scores for low-sodium products. Regarding practice and obstruction for low-sodium diets, dietitians with high awareness scores had significantly (p<0.01) higher scores for practice and lower scores for obstruction of low-sodium diets. These findings suggest that it is critical to develop diverse low-sodium products and recipes, and that dietitians should educate students about the necessity and the practice of reduced sodium diets.

• 한국재료학회지
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• 제11권12호
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• pp.1047-1051
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• 2001

Purity tantalum powder has been produced by sodium reduction of potassium tantalum fluoride($K_2TaF_7$)in a stainless steel bomb. The influence of experimental variable, such as excess of reductant and temperature of reduction on the yield and quality of the Ta powder has been studied. The excesses of reductant were varied from -20%, -10%, 0%, 5%, 10%, 20%. When -20% excess of sodium was used, the un-reacted sodium remained in the reacted product. The yield of 81% of Ta powder has been achieved by reducing 50g of$K_TaF_7$with 5% sodium in excess of stoichiometric amount in presence of 16.8g of sodium chloride in the charge at a reduction temperature of$905{\circ}C$. The proportion of fine fraction(~325mesh) decreased appreciably with the increase of sodium excess, and the yield of tantalum powder improved from 65% to 94%. The average particle size of Ta Powder is improved from 3 microns to 4 microns in the 5% excess sodium.

• Nutrition Research and Practice
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• 제8권6호
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• pp.719-723
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• 2014

BACKGROUND/OBJECTIVES: South Korean's sodium consumption level is more than twice the upper limit level suggested by the WHO. Steep increases in the prevalence of hypertension and cardiovascular disease in Korea necessitate more effective sodium reduction programs. This study was conducted in order to compare sodium intake-related eating behaviors and key psychosocial factors according to age group and gender. SUBJECTS/METHODS: Using an online survey, a total of 1,564 adults (20-59 years old) considered to be geographically representative of South Korea were recruited and surveyed. The major outcomes were perceived behaviors, knowledge, intentions, and self-efficacy related to sodium intake. RESULTS: The results show that perceived behavior and level of self-efficacy related to low sodium consumption differed by age and gender. Female participants showed better behavior and intention towards low sodium intake than male counterparts. Young participants in their 20s showed the lowest intention to change their current sodium intake as well as lowest self-efficacy measures. CONCLUSIONS: Future sodium reduction interventions should be developed with tailored messages targeting different age and gender groups. Specifically, interventions can be planned and implemented at the college level or for workers in their early career to increase their intention and self-efficacy as a means of preventing future health complications associated with high sodium intake.

• Nutrition Research and Practice
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• 제9권2호
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• pp.180-185
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• 2015

BACKGROUND/OBJECTIVES: The aims of the present study are: 1) to quantify sodium consumption of patients with unstable or uncontrolled hypertension, 2) to investigate if reduced sodium intake can lower BP in these patients, and 3), to assess the acceptability and feasibility of this approach. SUBJECTS/METHODS: This study included 25 adults (age: 50+ years) with frequently elevated BP or patients with uncontrolled, uncomplicated hypertension despite drug treatment in a general practice setting. BP and salt intake (24h urinary excretion and food records) were measured at baseline and after a sodium reduced diet. RESULTS: Mean (${\pm}SD$) systolic (SBP) over diastolic (DBP) blood pressure (mmHg) at baseline was $150.7({\pm}9.5)$/$84.149({\pm}5.6)$. Mean urinary sodium excretion was 146 mmol/24h. A reduction of 28 mmol sodium excretion decreased SBP/DBP to $135.5({\pm}13.0)$/$82.5({\pm}12.8)$ (P < 0.001). After one month of no dietary advice, only in 48%, SBP was still ${\leq}140mmHg$. CONCLUSION: Assessment of sodium intake using food records, 24h urine collections and probing questions to identify use of sodium containing supplements or drugs are essential for tailored advice targeted at sodium intake reduction. The results of the present study indicate that reduced sodium intake can lower BP after 4 weeks in unstable or uncontrolled hypertensive patients.

• 한국식생활문화학회지
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• 제33권5호
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• pp.426-436
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• 2018

This study assessed effective strategies to reduce the sodium intake among consumers using pork cutlet sauce as a model food system. Original pork cutlet sauce and sodium-reduced sauce (29% reduced by a salt substitute) were analyzed to characterize the sensory properties using descriptive analysis. The effects of sodium-reduction of the sauce, consumer type (nutrition teachers vs. general consumers), information related to the sodium content, serving method, and consumer's health, taste and sodium-related attitudes on the consumer's preference, perception, and intake of the sauce were analyzed using a consumer test. In descriptive analysis, the original and sodium-reduced sauce showed similar sensory characteristics but did not differ in saltiness. In the consumer test, there were no significant differences in the overall preference levels between the two sauces. On the other hand, there were significant differences in preference and perception between nutrition teachers and general consumer groups, which were due largely to their age as well as the health and sodium-related attitudes and nutritional knowledge differences. Sodium-reduced information decreased the perceived saltiness intensity. In addition, reducing sodium intake by serving pork cutlet sauce in a bottle can be an effective strategy because this serving method increased the acceptance and induced the smaller intake of sauce.

• 한국환경보건학회지
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• 제8권2호
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• pp.33-46
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• 1982

This experiment was carried out for the purpose of reducing alkaloid in reconstituted tobacco sheet and effluent of reconstituted tobacco sheet manufacturing company by treating oxidizing agents such as ozone, sodium hypochlorite, perchloric acid and hydrogen peroxide to tobacco extract created from the manufacturing process of reconstituted tobacco sheet. The effect of alkaloid reduction in tobacco extract by the volume added, time of treatment and pH of oxidizing agents were as follows: 1. When the solid rate of tobacco extract stood at 10 percent, the content of alkaloid, total sugar, total nitrogen and chlorine was 1,600mg/l, 11,000mg/l, 3,200mg/l and 4,000mg/l, respectively. 2. The effect of alkaloid reduction through ozone treatment was in proportion to time of ozone treatment. Alkaloid showed a 31.2 percent reduction under 8 hours' ozone treatment and 0.23g ozone consumed to remove lmg alkaloid. 3. Alkaloid reduction through sodium hypochlorite treatment was influenced by quantity of chlorine in sodium hypochlorite solution. To remove lmg alkaloid, 36.3mg chlorine was used. Reduction of alkaloid was not affected by time of sodium hypochlorite treatment, while showed the best reaction under pH 5-7. 4. The effect of alkaloid reduction by perchloric acid was under the control of the volume added and time of treatment of perchloric acid. The volume of perchloric acid required to remove alkaloid was on the decrease as time of treatment was getting longer. lmg alkaloid was removed by 0.15g perchloric acid under 8 hours' perchloric acid treatment. 5. Alkaloid reduction reacted slowly to the volume added and time of treatment of hydrogen peroxide. Under 8 hours' hydrogen peroxide treatment, it showed maximum removal, registering 10 percent alkaloid reduction.

• 대한지역사회영양학회지
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• 제25권1호
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• pp.21-31
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• 2020

Objectives: This study aimed to compare customers' perceptions of the need for a low-sodium diet and sodium-reduced operations in the industry foodservice by age. The relationships between health concerns and perceptions of the need for sodium-reduced operations and low-sodium diets in the industry foodservice were analyzed. Methods: A survey was conducted among 340 industry foodservice customers aged 20-50 years and residing in Seoul, Korea. This study investigated the respondents' health concerns, their perception of the need for sodium-reduced foodservice operations, their perception of a sodium-reduced diet, and the general details of the foodservices they used. A cross-tabulation analysis and ANOVA were performed to identify differences in measurement items by age, and a simple regression analysis was performed to examine relationships between measurement items. Results: For the customers' perception of the need for a sodium-reduced foodservice operation, the item "it is necessary to provide separate spices and sauces to reduce sodium intake" achieved the highest score (3.88 points out of a possible 5 points). For the perception of a sodium-reduced diet, the item "I think it is helpful for one's health" obtained the highest score (4.13 points). Respondents' health concerns had a positive effect on increasing the level of perception of the need for sodium-reduced foodservice operations and that of a sodium-reduced diet. Conclusions: Foodservice nutritionists could help enhance their customers' perceptions of the needs for sodium-reduced foodservice operations and sodium-reduced diets by frequently providing them with sodium-related health information.