Sodium appetite and sodium metabolism in ruminants assessed by preference tests

1979 ◽  
Vol 92 (1) ◽  
pp. 5-14 ◽  
Author(s):  
F. R. Bell ◽  
Jennifer Sly
Keyword(s):  
Sodium Salt ◽  
Salt Intake ◽  
Sodium Intake ◽  
Sodium Content ◽  
Sodium Balance ◽  
Sodium Salts ◽  
Metabolic Studies ◽  
Marked Preference ◽  
Excess Sodium ◽  
Sodium Metabolism

SummaryAdult sheep, unweaned and mature weaned calves have been examined by metabolic studies for sodium balance. The ratio of sodium input/output was near unity with only a very small amount of the ingested sodium salt being retained. A positive sodium balance was always present, with excess sodium salt being excreted. The main channel of sodium excretion was the kidney, although when sodium intake was increased the sodium content of the faeces showed a proportional increase. Unweaned calves, a few days old, were quite able to excrete excess sodium salts in concentrated urine.There was a clear difference in preference for sodium salts over water, between weaned calves allowed access to sodium salts while being fed milk, and weaned calves denied sodium salts at the milk feeding stage. Sodium-naive calves showed a marked preference for sodium salt solutions while the sodium-experienced calves showed at best an indifference and sometimes even an aversion. With continued access to sodium salts the volume ingested declined steadily in both groups but food intake remained constant.In both calves and sheep the preference for sodium salts showed considerable variation between animals. The evidence from parallel metabolic studies suggests that this variation indicates that salt intake is controlled by some mechanism, possibly in the central nervous system, which is activated by dynamic sodium metabolism. Our experimental results confirm that ruminants have a well developed salt taste but predilection for sodium salts could be a biochemical manifestation rather than a hedonic propensity.

scholarly journals Sodium Content of Foods Sold in the Spanish Market. Results from the BADALI Project

Nutrients ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 3410
Author(s):  
Marta Beltrá ◽  
Fernando Borrás ◽  
Ana B. Ropero
Keyword(s):  
Sodium Salt ◽  
Salt Intake ◽  
Sodium Intake ◽  
Salt Content ◽  
Daily Intake ◽  
Food Group ◽  
Sodium Content ◽  
High Sodium ◽  
Low Sodium ◽  
Pan American

High sodium/salt intake is a risk factor for Non-Communicable Diseases (NCDs). Excess sodium intake has been associated with high coronary heart disease, stroke and high blood pressure. The sodium daily intake is above the recommendations in the world as well as in Spain. Reducing salt content in processed foods and ready meals is one of the main strategies for reducing sodium intake. The aim of the present work is to characterise the presence of sodium in foods sold in the Spanish market. We also study a possible shift in sodium content in products over the last few years. For this purpose, 3897 products included in the BADALI food database were analysed, classified into 16 groups (G). We found that 93.3% of all foods displayed the sodium/salt content in the nutrition declaration. Meat—processed and derivatives (G8) had the highest mean and median values for sodium content, followed by snacks (G15) and sauces (G14). Only 12.7% of foods were sodium-free (≤ 5 mg/100 g or 100 mL), 32.4% had very low sodium (≤ 40 mg/100 g or 100 mL) and 48.2% were low in sodium (≤ 120 mg/100 g or 100 mL). On the contrary, 47.2% were high in sodium according to the Pan American Health Organisation Nutrient Profile Model (PAHO-NPM), while there were 31.9% according to the Chile-NPM. The agreement between the two NPMs was considered ‘substantial’ (κ = 0.67). When sodium content was compared over the years, no decrease was observed. This analysis was performed in the entire food population, by food group and in matched products. Therefore, more effort should be made by all parties involved in order to decrease the sodium/salt intake in the population.

Blood Pressure and Intra-Erythrocyte Sodium during Normal and High Salt Intake in Middle-Aged Men: Relationship to Family History of Hypertension, and Neurogenic and Hormonal Variables

1984 ◽  
Vol 66 (4) ◽  
pp. 427-433 ◽  
Author(s):  
Ottar Gudmundsson ◽  
Hans Herlitz ◽  
Olof Jonsson ◽  
Thomas Hedner ◽  
Ove Andersson ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Family History ◽  
Salt Intake ◽  
Sodium Intake ◽  
Positive Family History ◽  
Sodium Content ◽  
High Salt Intake ◽  
History Of ◽  
Family History Of Hypertension ◽  
Erythrocyte Sodium

1. During 4 weeks 37 normotensive 50-year-old men identified by screening in a random population sample were given 12 g of NaCl daily, in addition to their usual dietary sodium intake. Blood pressure, heart rate, weight, urinary excretion of sodium, potassium and catecholamines, plasma aldosterone and noradrenaline and intra-erythrocyte sodium content were determined on normal and increased salt intake. The subjects were divided into those with a positive family history of hypertension (n = 11) and those without such a history (n = 26). 2. Systolic blood pressure and weight increased significantly irrespective of a positive family history of hypertension. 3. On normal salt intake intra-erythrocyte sodium content was significantly higher in those with a positive family history of hypertension. During high salt intake intra-erythrocyte sodium content decreased significantly in that group and the difference between the hereditary subgroups was no longer significant. 4. In the whole group urinary excretion of noradrenaline, adrenaline and dopamine increased whereas plasma aldosterone decreased during the increased salt intake. 5. Thus, in contrast to some earlier studies performed in young subjects, our results indicate that moderately increased sodium intake acts as a pressor agent in normotensive middle-aged men whether there was a positive family history of hypertension or not. We confirm that men with positive family history of hypertension have an increased intra-erythrocyte sodium content, and that an increase in salt intake seems to increase overall sympathetic activity.

Basal Activity of the Natriuretic Factor Extracted from the Rat Kidney as a Function of the Diet and its Role in the Regulation of the Acute Sodium Balance

1980 ◽  
Vol 58 (5) ◽  
pp. 385-391 ◽  
Author(s):  
F. Louis ◽  
H. Favre
Keyword(s):  
Sodium Intake ◽  
Rat Kidney ◽  
Extracellular Volume ◽  
Gel Filtration ◽  
Kidney Tissue ◽  
Weight Fraction ◽  
Sodium Content ◽  
Sodium Balance ◽  
Low Molecular Weight ◽  
Extracellular Volume Expansion

1. The effect of the sodium content of the diet on the natriuretic activity of an extract from the kidneys was studied in non-expanded and volume-expanded rats. 2. The kidney tissue was homogenized and the supernatant fractionated by gel filtration on Sephadex G-25. A single low-molecular-weight fraction eluted after the salt possessed the natriuretic activity and was tested on a rat bioassay. 3. The natriuretic activity of the fraction obtained from the kidneys of non-expanded rats was related to the sodium intake. 4. After an acute extracellular volume expansion, the natriuretic activity obtained from the fraction extracted from the kidneys was much greater than before expansion and was related to the dietary intake of sodium.

scholarly journals Change in Salt Intake Affects Blood Pressure of Chimpanzees

Circulation ◽  
2007 ◽  
Vol 116 (14) ◽  
pp. 1563-1568 ◽  
Author(s):  
Paul Elliott ◽  
Lesley L. Walker ◽  
Mark P. Little ◽  
John R. Blair-West ◽  
Robert E. Shade ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Confidence Interval ◽  
Human Population ◽  
Salt Intake ◽  
Homo Sapiens ◽  
Sodium Intake ◽  
Systolic Pressure ◽  
Sodium Content ◽  
Standard Diet ◽  
Arterial Blood

Background— Addition of up to 15.0 g/d salt to the diet of chimpanzees caused large rises in blood pressure, which reversed when the added salt was removed. Effects of more modest alterations to sodium intakes in chimpanzees, akin to current efforts to lower sodium intakes in the human population, are unknown. Methods and Results— Sodium intakes were altered among 17 chimpanzees in Franceville, Gabon, and 110 chimpanzees in Bastrop, Tex. In Gabon, chimpanzees had a biscuit diet of constant nutrient composition except that the sodium content was changed episodically over 3 years from 75 to 35 to 120 mmol/d. In Bastrop, animals were divided into 2 groups; 1 group continued on the standard diet of 250 mmol/d sodium for 2 years, and sodium intake was halved for the other group. Lower sodium intake was associated with lower systolic, diastolic, and mean arterial blood pressures in Gabon (2-tailed P <0.001, unadjusted and adjusted for age, sex, and baseline weight) and Bastrop ( P <0.01, unadjusted; P =0.08 to 0.10, adjusted), with no threshold down to 35 mmol/d sodium. For systolic pressure, estimates were −12.7 mm Hg (95% confidence interval, −16.9 to −8.5, adjusted) per 100 mmol/d lower sodium in Gabon and −10.9 mm Hg (95% confidence interval, −18.9 to −2.9, unadjusted) and −5.7 mm Hg (95% confidence interval, −12.2 to 0.7, adjusted) for sodium intake lower by 122 mmol/d in Bastrop. Baseline systolic pressures higher by 10 mm Hg were associated with larger falls in systolic pressure by 4.3/2.9 mm Hg in Gabon/Bastrop per 100 mmol/d lower sodium. Conclusions— These findings from an essentially single-variable experiment in the species closest to Homo sapiens with high intakes of calcium and potassium support intensified public health efforts to lower sodium intake in the human population.

Sodium Intake of Infants in the United States

PEDIATRICS ◽  
1981 ◽  
Vol 68 (3) ◽  
pp. 444-445
Author(s):  
Lewis A. Barness ◽  
Peter R. Dallman ◽  
Homer Anderson ◽  
Platon Jack Collipp ◽  
Buford L. Nichols ◽  
...  
Keyword(s):  
Animal Studies ◽  
Salt Intake ◽  
Sodium Intake ◽  
Monosodium Glutamate ◽  
Later Life ◽  
The United States ◽  
Sodium Content ◽  
Etiologic Factor ◽  
National Academy Of Sciences ◽  
Infant Foods

Since 1963 there has been public concern that prepared infant foods might be providing more sodium than was needed for normal infants.1 The suggestion that salt intake is an etiologic factor in the development of hypertension in adults rests largely on epidemiologic evidence and animal studies. Additional factors of genetic and nutritional origin play a role in its pathogenesis.2 The hypothesis that the sodium content of infant foods contributes toward hypertension in later life has not been confirmed in two areas. (1) Infant foods, even with salt added, have not been shown to contribute as much sodium to the diet as whole milk or table foods. (2) Studies of infants fed diets that were either high or low in sodium (9.25 mEq/100 kcal vs 1.93 mEq/100 kcal) from ages 3 to 8 months showed no correlation between salt intake during infancy and blood pressure at 1 and 8 years of age.3 The Subcommittee on Safety and Suitability of Monosodium Glutamate and Other Substances in Baby Foods, Food Protection Committee, Food and Nutrition Board, National Academy of Sciences,4 observed in 1970 that, between the fourth and 12th months of life, the introduction of supplemented foods and cow's milk increased the intake of sodium to approximately 5 mEq/100 kcal/day. Some of this sodium came from prepared infant foods. It was recommended that the manufacturers of infant foods add no more than 0.25% salt to foods requiring this in their formulation. This recommendation was implemented. The Committee on Nutrition observed in 1974 that this reduction in added salt had decreased the sodium intake only of infants less than 8 months old.2

scholarly journals Effects of AT1A receptor deletion on blood pressure and sodium excretion during altered dietary salt intake

2002 ◽  
Vol 283 (3) ◽  
pp. F447-F453 ◽  
Author(s):  
Amy J. Mangrum ◽  
R. Ariel Gomez ◽  
Victoria F. Norwood
Keyword(s):  
Blood Pressure ◽  
Salt Intake ◽  
Sodium Intake ◽  
Dietary Sodium ◽  
Sodium Balance ◽  
Wild Type ◽  
Compensatory Mechanisms ◽  
Wide Range ◽  
Blood Pressures ◽  
Pressure Natriuresis

The present study was performed to investigate the role of type 1A ANG II (AT1A) receptors in regulating sodium balance and blood pressure maintenance during chronic dietary sodium variations in AT1A receptor-deficient (−/−) mice. Groups of AT1A (−/−) and wild-type mice were placed on a low (LS)-, normal (NS)-, or high-salt (HS) diet for 3 wk. AT1A(−/−) mice on an LS diet had high urinary volume and low blood pressure despite increased renin and aldosterone levels. On an HS diet, (−/−) mice demonstrated significant diuresis, yet blood pressure increased to levels greater than control littermates. There was no effect of dietary sodium intake on systolic blood pressures in wild-type animals. The pressure-natriuresis relationship in AT1A (−/−) mice demonstrated a shift to the left and a decreased slope compared with wild-type littermates. These studies demonstrate that mice lacking the AT1A receptor have blood pressures sensitive to changes in dietary sodium, marked alterations of the pressure-natriuresis relationship, and compensatory mechanisms capable of maintaining normal sodium balance across a wide range of sodium intakes.

scholarly journals Labelling the salt content in foods: a useful tool in reducing sodium intake in Finland

2008 ◽  
Vol 11 (4) ◽  
pp. 335-340 ◽  
Author(s):  
Pirjo Pietinen ◽  
Liisa M Valsta ◽  
Tero Hirvonen ◽  
Harri Sinkko
Keyword(s):  
Salt Intake ◽  
Sodium Intake ◽  
Adult Population ◽  
Salt Content ◽  
Sodium Content ◽  
Food Composition ◽  
Processed Meat ◽  
Food Groups ◽  
Public Health Importance ◽  
The Impact

AbstractObjectiveTo estimate the impact of choosing food products labelled either as low or high in salt on salt intake in the Finnish adult population.Setting and subjectsThe National FINDIET 2002 survey with 48-hour recalls from 2007 subjects aged 25–64 years. Sodium intake was calculated based on the Fineli® food composition database including the sodium content of natural and processed foods as well as the salt content of recipes. The distribution of salt intake was calculated in different ways: the present situation; assuming that all breads, cheeses, processed meat and fish, breakfast cereals and fat spreads consumed would be either ‘lightly salted’ or ‘heavily salted’ based on the current labelling practice; and, in addition, assuming that all foods would be prepared with 50% less or more salt.ResultsExcluding underreporters, the mean salt intake would be reduced by 1.8 g in men and by 1.0 g in women if the entire population were to choose lightly salted products and further by 2.5 and 1.8 g, respectively, if also salt used in cooking were halved. Choosing heavily salted products would increase salt intake by 2.1 g in men and by 1.4 g in women. In the worst scenarios, salt intake would be further increased by 2.3 g in men and by 1.6 g in women.ConclusionsThese calculations show that the potential impact of labelling and giving consumers the possibility to choose products with less salt is of public health importance. In addition, strategies to reduce the salt content of all food groups are needed.

Osmoregulatory control of renal sodium excretion after sodium loading in humans

1998 ◽  
Vol 275 (6) ◽  
pp. R1833-R1842 ◽  
Author(s):  
Lars Juel Andersen ◽  
Peter Norsk ◽  
Lars Bo Johansen ◽  
Poul Christensen ◽  
Thomas Engstrøm ◽  
...  
Keyword(s):  
Central Venous Pressure ◽  
Sodium Excretion ◽  
Salt Intake ◽  
Sodium Intake ◽  
Venous Pressure ◽  
Sodium Balance ◽  
Plasma Sodium ◽  
Central Venous ◽  
Salt Loading ◽  
Significant Difference

The hypothesis that renal sodium handling is controlled by changes in plasma sodium concentration was tested in seated volunteers. A standard salt load (3.08 mmol/kg body wt over 120 min) was administered as 0.9% saline (Isot) or as 5% saline (Hypr) after 4 days of constant sodium intake of 75 (LoNa+) or 300 mmol/day (HiNa+). Hypr increased plasma sodium by ∼4 mmol/l but increased plasma volume and central venous pressure significantly less than Isot irrespective of diet. After LoNa+, Hypr induced a smaller increase in sodium excretion than Isot (48 ± 8 vs. 110 ± 17 μmol/min). However, after HiNa+the corresponding natriureses were identical (135 ± 33 vs. 139 ± 39 μmol/min), despite significant difference between the increases in central venous pressure. Decreases in plasma ANG II concentrations of 23–52% were inversely related to sodium excretion. Mean arterial pressure, plasma oxytocin and atrial natriuretic peptide concentrations, and urinary excretion rates of endothelin-1 and urodilatin remained unchanged. The results indicate that an increase in plasma sodium may contribute to the natriuresis of salt loading when salt intake is high, supporting the hypothesis that osmostimulated natriuresis is dependent on sodium balance in normal seated humans.

scholarly journals Knowledge, attitudes and practices surrounding sodium intake in Ecuador: a pilot study

2021 ◽  
Vol 23 (1) ◽  
pp. 1-6
Author(s):  
Maria Elisa Herrera Fontana ◽  
Ivan Sisa ◽  
Karen Mosquera ◽  
Maria Elisa Celi ◽  
Enrique Teran
Keyword(s):  
Salt Intake ◽  
Sodium Intake ◽  
Meat Products ◽  
Sodium Content ◽  
Cross Sectional ◽  
Convenience Sample ◽  
Attitudes And Practices ◽  
Food Items ◽  
Sugary Drinks ◽  
Knowledge Attitudes And Practices

Objective To identify the main sources of sodium in the Ecuadorian diet and determine knowledge, attitudes and practices related to the use of salt/sodium.Materials and Methods A cross-sectional study was conducted by taking a convenience sample of 177 adults. Socio-demographic, anthropometric and clinical data were collected. Frequency of consumption of food items high in sodium and knowledge, attitudes and practices regarding salt intake were evaluated.Results Meat products, sugary drinks, sausages, canned fish and seasonings are the food items with the highest consumption and sodium content. Nearly 97% of participants had a misperception about their sodium intake. While 99% know that a diet high in salt causes health problems, only 38.4% take a systematic action to regulate their salt intake.Conclusions There were a common misperception about sodium consumption. Only a small number of people take an action to reduce their consumption, although these actions was ineffective. 

Changing Feeding Trends as a Cause of Electrolyte Depletion in Infants with Cystic Fibrosis

PEDIATRICS ◽  
1981 ◽  
Vol 68 (2) ◽  
pp. 203-207
Author(s):  
James J. Laughlin ◽  
Mary Sue Brady ◽  
Howard Eigen
Keyword(s):  
Cystic Fibrosis ◽  
Breast Milk ◽  
Infant Formula ◽  
Salt Intake ◽  
Sodium Intake ◽  
Gastrointestinal Symptoms ◽  
Sodium Content ◽  
Initial Symptom ◽  
Electrolyte Depletion ◽  
Dietary Records

Between June 1979 and June 1980, 16 infants with cystic fibrosis (CF) were cared for at the James Whitcomb Riley Hospital for Children. Five of these children (average age 5.8 months) had a total of eight episodes of electrolyte depletion, with six episodes unassociated with high environmental temperature, fever, or significant gastrointestinal symptoms. Their primary symptoms were poor weight gain and anorexia. According to their dietary records, these five infants, at the time of their initial presentation, had an average electrolyte intake of 8 mEq of sodium, 12 mEq of potassium, and 10 mEq of chloride per day. All infants had been fed either standard infant formula or breast milk. Infant feeding surveys indicate that the estimated average sodium intake of 6-month-old infants has decreased from 45 mEq/day in 1965 to 15 mEq/day since 1977 when manufacturers stopped adding salt to baby foods. In addition, since 1971 the percentage of infants 6 months of age receiving breast milk or standard infant formula rather than cow's milk, which is high in sodium content, has increased from 33% to 72%. This decreased salt intake places the infant with CF at greater risk for electrolyte depletion than in the past. It is expected that a larger percentage of infants with CF will have electrolyte depletion as their initial symptom especially during periods of increased sweating or when electrolyte losses are experienced during gastrointestinal illnesses. CF should be suspected in any infant with electrolyte depletion, and infants known to have CF need daily salt supplementation. Serum electrolytes should be measured if the infant is experiencing weight loss or anorexia, particularly during periods of excessive salt losses.

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