• Biomedical Science Letters
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• v.9 no.1
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• pp.15-19
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• 2003

Parathyroid hormone has clearly emerged as the most promising new anabolic treatment for osteoporosis by increasing the activation of osteoblast. It is known that chlorella increases both bone mineral density (BMD) and the rate of bone formation. The purpose of the present study was to determine whether the chlorella dietary supplementation could effect the thyroid or parathyroid hormones associated with increased BMD and bone formation. Twenty-two postmenopausal woman were treated for four month with 4 gm of chlorella dietary supplementation per day, then assessed serum calcium,25 OH vitamin D$_3$, thyroid hormone and parathyroid hormone before and after treatment. The mean 25 OH vitamin D$_3$ and parathyroid hormone were shown to marked increases by 193% and 265% respectively, in contrast to decreases by 9.4%, 37%, 33% and 14% in serum calcium, triiodo-thyroxine, free thyroxine and thyroxine stimulation hormone. In conclusion, treatment of postmenopausal women with chlorella dietary supplementation resulted in an increase in BMD and bone formation through enhancement of parathyroid hormone and 25 OH vitamin D$_3$, and a decrease in thyroid hormones.

• Journal of the Korean Society of Food Culture
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• v.36 no.6
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• pp.595-606
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• 2021

Unhealthy dietary behavior such as insufficient calcium intake can be one of risk factors of osteoporosis and chronic diseases in older people. This study evaluated the recent trends in dietary calcium intake and the food source in Korean adults aged 50 years or older using the Korea National Health and Nutrition Examination Survey (KNHANES, 2015-2019) data. This study used 24-hour recall survey data to investigate the calcium intake, the major food groups and main dishes contributing to the calcium intake. The mean calcium intake was 479.55-506.81 mg/day. The major food groups that contribute to calcium intake were vegetables, milks and fishes. Dairy and frozen desserts and kimchi were the major dish groups that contributed to the calcium intake. Calcium intake from milk in dairy and frozen dessert group has been high in last 5 years (50-64 years old: 34.71-47.68 mg, 65-74 years old: 29.72-43.65 mg, over 75 years old: 22.91-42.93 mg). In addition, baechu-kimchi is the most contributed to the calcium intake in kimchi group (50-64 years old: 35.10-41.47 mg, 65-74 years old: 29.62-34.96 mg, over 75 years old: 23.79-29.13 mg). In conclusion, various source of calcium needs to be recommended to increase intake calcium in over 50 years, which may reduce chronic diseases and improve quality of life.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.56 no.6
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• pp.841-849
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• 2023

Corallina pilulifera (CP) is prevalent along the Korean coastline and belongs to the Corallinaceae family, exhibiting growth throughout all seasons. This study confirmed the role of calcium supplementation through CP, calcined CP (CCP), and a commercial calcium powder, highlighting variations in dosage within animal models induced by a calcium-deficient diet. Analysis of calcium absorption was conducted by assessing the serum and urine calcium levels during the feeding periods. Serum calcium content was significantly higher in the control group (CON, 9.79 mg/dL) than in the calcium-deficient model (CDM, 6.15 mg/dL). The calcium content of urine was significantly higher than that of CON (0.20 mg/dL) compared with CDM (0.08 mg/dL). Reticular bone thickness showed no significant differences between the CON and CDM groups. Additionally, micro-CT results demonstrated a reduction in the trabecular volume and a significant difference between the number of strands and the average interval of the reticular bone. In conclusion, CP serves as a promising source of calcium supplementation. Therefore, these findings emphasize that CP is of sufficient value as an industrial material related to calcium metabolism.

• Korean Journal of Community Nutrition
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• v.6 no.3
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• pp.306-316
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• 2001

This study investigated the correlations between nutrient intake and dietary attitudes in Korean school dietitians. A total of 493 school dietitians working in the Kangwon and Kyungnam areas participated in this study. The subjects were classified as the good group(33.5%), fair group(36.9%) and bad group(29.6%) based on dietary attitude score. The results were as follows. The average intake of energy, calcium, and iron were lower than the Korean RDA and average CPF ratio of energy intake was 64 : 17 : 19. The percent RDAs of nutrient intake of energy, calcium, iron and vitamin B$_1$were lower in the bad group than those in the fair group and good groups(p < 0.001). The mean adequacy ratio(MAR), an index of overall dietary quality, were different among the three groups(p < 0.001), the highest was 0.96 in the good group, the lowest was 0.88 in the bad group. The index of nutritional quality(INQ) was significantly higher in the good group than the other groups. The nutrient intakes were positively correlated with dietary attitudes(p < 0.01). The nutrient intakes, INQ, NAR and MAR were significantly increased as the dietary attitude score increased.

• Journal of the Korean Society of Food Culture
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• v.18 no.5
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• pp.418-427
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• 2003

This study was performed to investigate the relationships among personality preferences, dietary habit and nutrient intake of University students (n=283). Mean dietary habit score was similar between sexes and was 46.1/100 in male students and 45.1/100 in female students. Average energy intake of male students was 2,019 kcal (80.8% of RDA) and that of female students was 1,675 kcal (83.7%). Male students were taking less than 90% of RDA in calcium and vitamin $B_2$ and female students were taking less than 90% of RDA in calcium, iron, vitamin C, and vitamin A. Students preferring Judgment had significantly higher dietary habit score than students preferring Perception. Extraversion had higher nutrient intake than Introversion both in male and female students. Male students preferring Feeling had also higher nutrient intake than students preferring Thinking. Nutrient density per 1,000 kcal was higher in Thinking and Judgment than Feeling and Perception. In conclusion, students preferring Judgment and Extraversion have better dietary habit and nutrient intake than those preferring Perception and Introversion. More studies are necessary between personality preferences and dietary behavior to contribute to effective nutrition education and counseling.

• Korean Journal of Community Nutrition
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• v.22 no.4
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• pp.279-288
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• 2017

Objectives: Recommended Menu (RM) prepared according to the Target Pattern expected to meet the dietary reference intake (DRI) of nutrients. Nutritional adequacy of RM in 'DRI for Koreans 2015' were analyzed to verify whether such expectation was fulfilled. Methods: Dishes in RM are categorized by 5 food groups, and number and types of dishes for main meal and between-meals were analyzed. The energy and 12 nutrients (protein, dietary fiber, Ca, P, Fe, Na, K, vitamin A, thiamin, riboflavin, niacin and vitamin C) contents in 10 RMs were calculated using the food composition table (CD) in 'DRI for Koreans'. Energy, energy contribution ratio, and nutrient contents in 10 RMs for 18 age groups were evaluated based on the 'DRI for Koreans 2015'. Results: Number of dishes per meal were 4.83, and representative table setting consisted of cooked rice + soup (or stew) +3 side dishes. Energy contents of RM were 75~109% of estimated energy requirement (EER). None of the RM met the DRI of all 12 nutrients examined. Calcium was the most insufficient nutrient. Only 1-2 years' RM met the DRI, all the other RMs did not meet the calcium DRI. Dietary fiber and potassium contents were also insufficient in most RM. In adult male's RM, only 1 nutrient, i.e. calcium did not meet the DRI, but in female adult's RM, 5~6 nutrients did not meet the DRI. Energy contribution ratio of carbohydrate, protein, and fat in RM were 59.0~70.4%, 15.7~17.5%, 12.1~23.5%, respectively. And 4 RMs out of 10 exceeded the upper limit of acceptable macro-nutrient distribution range (AMDR) of carbohydrate and 3 RMs out of 10 RM were below the lower limit of fat AMDR. Contribution ratio of nutrients were ${\geq}40%$ by food groups were as follows: grain group in energy and carbohydrate; meat fish egg legume group in fat, protein, and niacin; vegetables group in dietary fiber, vitamin A, and vitamin C; milk dairy products group in calcium. Conclusions: RM prepared according to the Target Pattern did not meet nutritional adequacy as expected. Especially calcium, potassium, and dietary fiber contents are needed to be increased in many RMs. Further, energy content in RM needs to be adjusted for fat sugar food group assigned in Target Pattern and condiment.

• Journal of the East Asian Society of Dietary Life
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• v.7 no.3
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• pp.375-382
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• 1997

This study was performed to evaluate the nutrient intake status according to coffee intake among Korean female college students. Two-hundred subjects were asked for their daily coffee intake using a questionnaire. Daily intakes of nutrients and food groups were calculated 3-day food records. The mean height and weight of the subjects were 161.6cm and 51.2kg. The mean daily intake of coffee and milk were 0.5 and 0.6 cups, respectively. When nutrient intake was compared to RDA for Koreans, intakes of energy, iron, vitamin A were short of recommendations. The mean intakes of calcium, sodium, vitamin B$_2$ in BMI＜20 group were significantly higher than those in BMI $\geq$20 group. The mean intakes of calcium and phosphorous in no-coffee group were significantly higher than those in $\geq$2 cup-coffee group. The mean intake of beverage and others significantly increased as the level of coffee intake was increased. However, intake of milk and its product decreased. There were significantly negative correlation between coffee and calcium intake, and positive correlation between milk and calcium intake. These results indicate that coffee consumption decreases calcium intake because of decrement of milk and its products. Therefore, it could be suggested that there is increased need for nutritional education on proper eating patterns for female college students.

• Journal of Nutrition and Health
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• v.24 no.1
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• pp.30-39
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• 1991

This study was designed to investigate the effects of dietary calcium. serum estrogen level and physical activity on the bone status of 116 healthy elderly women living in urban area. Current calcium intake was assessed by convenient method(refered to as Ca intake) and calcium containing food frequency method(refered to as Ca index) Daily activity record was used for the estimation of physical activity level, and serum estrogen level was measured from fasting blood of subjects. The rate of bone resorption was evaluated by the determination of hydroxyproline(Hpr) in fasting urine with correction for creatinine excretion. The results of this study are summarized as follows : 1) Average daily Ca intake of subjects was 621.4$\pm$155.8mg, which is above the Korean recommended dietary allowances. However 44.8% of the subjects consumed Ca below RDA level. Ca index score was significantly correlated with the bone status(P<0.05), Ca intake did not show significant correlation with the bone status although a positive trend of influence was evident. 2) Average serum estrogen level of subjects was 18.7$\pm$9.8pg Contrary to our anticipation. estrogen level did not show any significant relation to age and bone status. 3) Daily physical activity was classified into four categories by activity intensity : sedentary. moderate, active and severe. The average physical activity of subjects belong to moderate level. and the bone status was significantly related to the physical activity(P<0.01) 4) Among other influential factors such as age, pocket-money. family type. drinking, smoking and BMI, there was a significant difference between bone status and BMI(P<0.05). 5) Multiple regression analysis of variables showed that physical activity has greater effect than other variables when the entire subjects were taken into account. However. eliminating the subjects whose bone status rated as excellent(Hpr/cr<0.009), Ca index showed higher correlation than physical activity. These results have demonstrated that dietary calcium intake is the primary important factor for keeping good bone health and that bone status of subjects with a sufficient calcium intake is affected by various factors such as physical activity, age, smoking. BMI and others.

• Journal of the Korean Home Economics Association
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• v.30 no.1
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• pp.99-113
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• 1992

This study was performed to investigate the effect of dietary protein and calcium levels on cadmium detoxication in rats. Seventy male Sprague-Dawley rats weighing 208 $\pm$ 19 g were blocked into 10 groups of 7 animals according to body weight. Five groups were fed 15% protein-0.6% calcium diet with 100ppm cadmium in drinking water for first 15days and the other 5groups fed same diet without cadmium in drinking water for same period and served as controls. After this 15-day intoxication period, each one of cadmium intoxication and control groups were fed each of 4 kinds of detoxifying diets different with protein(40%, 15%) and calcium(1.3%, 0.6%) levels without cadmimum in drinking water for following 15 days of detoxifying period. Results were summarized as follows: 1) Food intake, body weight gain, F.E.R. and weights of liver, kidney and femur were increased by detoxifying diets and high protein diet was most effective in weight gains of liver and kidney. 2) When cadmium and metallothionein contents of initial intoxication group and those of all detoxication groups were compared, cadmium and metallothionein contents in the liver were not changed, but those in kidney increased, and those in intestine decreased markedly. 3) Only dietary protein level affected cadmium and metallothionein distribution among organs, and cadmium contents of whole blood, liver, kidney and femur were lower in high protein diet, but metallothionein contents in liver and kidney were higher in high protein diet. 4) Gel filtration chromatogram showed that most of cadmium in the cytosol was bound to metallothionein fractions in high protein-high calcium group. Results obtained indicated that high protein diet was effective in cadmium detoxication by increasing the induction of metallothionein synthesis. But high calcium diet did not play a role in cadmium detoxication.

• Preventive Nutrition and Food Science
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• v.17 no.2
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• pp.93-100
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• 2012

The purpose of this study was to identify food sources for major minerals such as calcium (Ca), phosphorus (P), sodium (Na) and potassium (K), and to evaluate the relationship between dietary intake of these minerals and serum lipids in healthy Korean adults. A total of 132 healthy men and women completed a physical examination and dietary record and provided blood samples for lipid profile analysis. Results showed the following daily average mineral intakes: 373.4 mg of calcium, 806.0 mg of phosphorous, 3685.8 mg of sodium, and 1938.3 mg of potassium. The calcium-to-phosphorus and sodium-to-potassium ratio was about 0.5 and 2.0, respectively. The primary sources for each mineral were: vegetables (24.9%) and fishes (19.0%) for calcium, grains (31.4%) for phosphorus, seasonings (41.6%) and vegetables (27.0%) for sodium, and vegetables (30.6%) and grains (18.5%) for potassium. The correlation analysis, which has been adjusted for age, gender, total food consumption, and energy intake, showed significantly positive correlations between Ca/P and serum HDL cholesterol levels, between Na intake and the level of serum total cholesterol, and between Na/K and the level of serum cholesterol and LDL cholesterol. Our data indicates that the level of mineral consumption partially contributes to serum lipid profiles and that a diet consisting of a low Ca/P ratio and a high Na/K ratio may have negative impacts on lipid metabolism.