The purpose of this study was to develop a dietary education program, and to evaluate the effectiveness of the education program for children from low-income families. A total of 242 children (122 education groups and 120 control groups) were run six times a dietary education program from April to December 2018, and a questionnaire was administered before and after the education to evaluate effectiveness. Elementary school students were the most prevalent in the education and the control group. In the education group, the body height and weigh were 137.27 cm and 33.69 kg, respectively, and in the control group the body height and weight were 143.48 cm and 40.64 kg, respectively. The education group showed positive change in dietary self-efficacy and dietary knowledge compared to the control group. In particular, ‘I can have meals regularly’ (Education Group: 4.00 points from 3.71 points) and 'I can choose fruits instead of cookies candies as snacks (Education Group: 4.01 points from 3.70 points) The score increased after participation in the program. In the change of nutritional and hygiene knowledge of children, the education group scored 3.63 of 10 points before education, but the score significantly increased to 5.70 points after education(p<0.001).

This study was conducted to explore portion size estimation by comparing the measurement errors of food and macronutrient intake by photography estimation and 24-hour recall from weighing method. A total of 28 female participants aged 20-24 years old were provided a meal that included rice, chard soup with soybean paste, stir-fried squid, japchae, stirfried boiled fish paste, lettuce geotjeori, and kimchi. Each portion was measured accurately, and food intake was measured using three dietary assessment methods. For the photography method, trained researchers estimated remaining food amount by analyzing photographs using a mean of four times. The measurement errors for the stir-fried squid and japchae were larger by the 24-hour recall method, while the error for kimchi was larger by the photography method. The correlation coefficients for each food, except chard soup with soybean paste, between the weighing method and photography method were 0.77~0.99 (p<0.001). The correlation coefficients of energy and intake of macronutrients between the weighing method and photography method were 0.85~0.86 (p<0.001). The results of this study demonstrate substantially less measurement error using the photography method than the 24-hour recall method. However, further research is needed to standardize various kinds of foods, photograph angles, serving plates, and serving style for establishment of reliable and valid portion size estimation using the photography method.

The purpose of this study was to compare the quantitative and qualitative assessment of dietary intake between patients with metabolic syndrome (MetS) and healthy subjects and to investigate dietary factors related to MetS. Anthropometric measurements, blood analysis, and dietary intake as assessed by 24-hour recall were conducted in MetS patients (n=15) and healthy subjects (n=25). In order to assess the quantity and quality of dietary intake, daily nutrient intake, nutrient density, nutrient intake to dietary reference intake (DRI), nutrient adequacy ratio (NAR), food intake, dietary diversity score (DDS), and dietary variety score (DVS) were analyzed. The statistical differences between MetS patients and controls were analyzed using the SAS software program. Daily energy intake and food intake were not significantly different between the two groups (2,154.3 kcal vs. 1,872.9 kcal; 1,280.0 g vs. 1,261.6 g). There were also no significant differences in daily nutrient intake, nutrient intake ratio to DRI, NAR, or DVS between the MetS group and the control group. However, daily intake of eggs and milk in MetS patients was significantly lower than in the control group (9.0 g/day vs. 30.3 g/day, p<0.05; 0 g/day vs. 49.7 g/day, p<0.05). These results indicate that low intake of eggs and dairy products may be related to the development of MetS.

Accuracy of dietary assessment depends on correct estimation of quantity as well as correct data on composition of the products. Milk and soymilk were considered quite homogeneous in items of package size and composition. One serving size of fluid milk and soymilk is considered 200 mL but there are products with different amounts on the market. This study was conducted to investigate variations of amounts and composition of fluid milk and soymilk products of one portion siz on Korean market. Twenty-nine milk products were purchased and categorized into 8 groups-regular, low-fat, skim, chocolate, strawberry-flavored, banana-flavored, and black soybean-added. Sixteen fluid soymilk products were purchased and categorized into 4 groups-regular, infant, black sesame or black soybean added and others. Actual volume of each product was measured by mass cylinder and compositions of major nutrients on the package were compared to the values in the most widely used nutrient DB in Korea. Amounts of milk specified on the package of purchased products were 182.3-318.5 ml, the largest being banana-flavored milk. Amounts of soy milk were 184.3-240.5 mL, the largest being regular soymilk. Measured amount of each products were close to the amount on the package (<5%). Contents of macronutrients on the package were different from the food composition table in several products. The amounts of calcium varied greatly among the products due to the popularity of adding calcium to milk and soymilk products recently. These variations in the amount and contents of major nutrients in milk and soymilk products can lead to considerable error to the results of dietary assessment unless the amount and the composition of each product are regularly updated in the food composition table whenever the new products are introduced in the market.

Polycyclic aromatic hydrocarbons(PAHs)의 인체에 대한 위해성 정도를 판단하기 위해 PAHs의 대표독성물질인 benzo(a)pyrene의 독성을 기준으로 하는 TEFs를 적용하여, PAHs의 주요노출식품에 의한 위해성 평가를 수행하였다. 숯불구이쇠고기, 숯불구이돼지공기, 숯불구이닭고기, 햄, 베이컨, 및 식용유지 등을 대상으로 PAHs 오염도를 모니터링한 결과 숯불구이닭고기에서 총 PAHs농도가 9.3 ppb로 가장 높게 검출되었으며 각각의 congener들 모두 다른 식품에서 보다 높게 나타났다. 반면에 숯불구이쇠고기, 베이컨, 숯불구이돼지고기, 햄 및 식용유지의 총 PAHs는 각각 0.2 ppb, 0.3 ppb, 0.7 ppb, 0.8 ppb 및 1.2 ppb로 비교적 낮은 값을 나타냈다. TEFs값을 적용하여 환산된 오염도 값의 경우에서도 숯불구이닭고기가 가장 높은 값을 보였고, congener들의 농도를 비교했을 때 숯불구이닭고기, 숯불구이돼지고기, 베이컨, 숯불구이쇠고기 및 햄에서 모두 BaP의 농도가 각각 1.88 ㎍-TEQ_BaP/kg, 0.19 ㎍-TEQ_BaP/kg, 0.08 ㎍-TEQ_BaP/kg, 0.04 ㎍-TEQ_BaP/kg 및 0.02 ㎍-TEQ_BaP/kg로 congener들 중 가장 높게 나타났고 식용유지에서는 dibenzo(a, h)anthracene의 농도가 0.21㎍-TEQ_BaP/kg으로 가장 높은 값을 나타냈다. 우리나라 사람들의 PAHs 주요노출식품 섭취로 인한 만성1일인체노출량은 4.32×10^-4 ㎍/kg/day으로 산출되었으며 선정된 식품 중에서 숯불구이닭고기의 노출기여도가 가장 높았다. PAHs의 초과발암위해도는 만성1일인체노출량과 BaP의 발암력인 7.3 (mg/kg/day)^-1을 고려하였을 때 3.44×10^-6, 백만명동 3~4명 수준이어다. 우리나라 대표식단을 통한 PAHs 노출량을 반영할 수 있는 위해성 평가각 추후 계속되어야 할 것으로 사료된다.

Daily exposure of aflatoxin B₁ (AFB₁) was estimated in foods (rice, barley, soybean, peanut, soysauce, soybean paste) by ELISA (enzyme linked immunosorbent assay) using polyclonal antibody R_(101). Before ELISA, a simple extraction method was applied for the quantitation of AFB₁ in foods using chloroform which showed high recovery (70± 12%). AFB₁ levels in foods were 0.32 ng/ml (rice), 0.24 ng/ml (barley), 0.22 ng/ml (peanut), 0.30-0.78 ng/ml (soysauce), and 0.2 ng/ml (soybean paste). Based on food consumption, we estimated that Koreans were exposed to AFB₁ at the level of 1.86±0.46 ng/kg/day and liver cancer incidence attributed to AFB₁ exposure (assuming that AFB₁ as a single hepatocarcinogenic agent) might be calculated to be 13.1 per 100,000 population. Our data demonstrate that AFB₁ levels in foods were below the regulation of 10 ppb in foods and might not be the major risk factor for the high incidence of liver cancer in Korea.