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Macronutrient and energy database for the 1995 Exchange Lists for Meal Planning: a rationale for clinical practice decisions.

For more than 50 years the exchange lists have been one method of meal planning for persons with diabetes as well as for those on weight-loss regimens. Little research has been conducted, however, concerning the methodologic basis of the system or its clinical effectiveness. Justification for specific food inclusions and general food groupings for the 1995 revision of the Exchange Lists for Meal Planning is provided by a database of foods and associated energy and macronutrient values. The mean energy and macronutrient values for each of the lists and sublists (starch, fruit, milk, and vegetables from the carbohydrate group; the meat and meal substitutes group, and the fat group) closely match the mean exchange values; however, the standard deviation and range are large. Interpretation of the database provides a rationale and guidance for decision making in clinical practice when using exchanges for meal planning, recipe, and food label calculations.

Diabetes Mellitus↗

[Effects of BSE on consumer attitudes and behavior].

The extremely high media emphasis of the BSE issue during the period December 2000 to February 2001 has caused considerable short term public concern. A significant amount of this concern was due to an intensive communication of pictures. Pictures are "fast shots into the brain" (Kroeber-Riel). Pictured stimuli run under the cognitive control of the recipients effecting the consumer below the threshold of consciousness. However, the issue has fallen into oblivion very soon. In summer 2001 the public concern was not higher than before the BSE crisis. The perception of product quality regained a "normal level". The public concern has caused a considerable decline of the demand for beef and an increase of demand for substitutes and organic meat. When the media emphasis of the BSE issue diminished, the beef demand recovered but did not reach the pre-crisis level again. However, the BSE crisis has intensified animal welfare concerns, polarized public opinion about food and agriculture and had big effects in the political sphere. Furthermore, the BSE crisis has led to additional--politically supported--activities of the organic food suppliers causing a further growth of this market segment.

Animal Welfare↗

Mineral analyses of vegetarian, health, and conventional foods: magnesium, zinc, copper, and manganese content.

The amounts of magnesium, zinc, copper, and manganese in 22 health and vegetarian foods and their conventional counterparts were measured. Increased levels of magnesium were associated with the presence of soy in vegetarian and health products. Zinc was low in the vegetarian meat and egg substitutes and in soy milk. Copper tended to be decreased in the vegetarian foods but increased in the health foods relative to levels in the conventional counterparts. Manganese levels were increased in most of the health and vegetarian food items relative to levels in the conventional foods.

Copper↗

[Meat quality in traditionally and alternatively (not exclusively milk substitute) fed veal calves].

A number of trials were done in veal calves, in which part of the milk substitutes were replaced by maize silage or a silage-concentrate mix. The milk scheme was reduced by twenty per cent in some trials or milk was only given for the first eleven weeks. When these alternative systems were adopted, growth was satisfactory and the costs of feed were considerably reduced. All calves were slaughtered when the live weigh was approximately 300 kilograms. The main effect of the alternative system was that the meat was no longer pale. The extent to which the quantity of milk substitute was reduced had no further effect on the colour of the meat. The differences in colour of the meat between traditionally and alternatively fed calves, visually as well as measured by instruments or chemically (haematin content) were significant. As regards other meat quality parameters, the differences between the two groups of calves were not significant. A taste panel only indicated significant effects of the feeding regimen in traditionally fed calves and one group of alternatively fed calves for flavour and taste but not for succulence and tenderness. As far as traditional veal and veal of alternatively fed calves are concerned, the shear-force values of meat samples taken at equal weight did not show any significant differences. In so far as it can be judged today, there is a restricted market for veal of these alternatively fed calves.

Animal Feed↗

Partial substitution of carbohydrate intake with protein intake from lean red meat lowers blood pressure in hypertensive persons.

BACKGROUND: Compared with carbohydrate intake, dietary intake of plant protein can lower blood pressure in humans, but the effects of animal protein intake on blood pressure have yet to be investigated. OBJECTIVE: We aimed to determine whether partial substitution of carbohydrate intake with animal protein intake from lean red meat changes blood pressure and other markers of cardiovascular disease risk in hypertensive persons. DESIGN: Hypertensive persons (n = 60) were recruited to an 8-wk parallel-design study. The participants were randomly assigned either to maintain their usual diet (control group) or to partially replace energy intake from carbohydrate-rich foods with protein from lean red meat (protein group). Measurements were performed at baseline and at the end of the intervention. RESULTS: Compared with the control group, the protein group had a significantly higher protein intake [x (95% CI) percent of energy: 5.3% (3.7%, 6.9%), P < 0.001] and a corresponding lower carbohydrate intake [-5.3% of energy (-7.9%, -2.7%), P < 0.001]. Body weight and intakes of fat, alcohol, and fiber were not significantly different between the groups. Compared with the control group, the clinic, 24-h, awake, and asleep systolic blood pressures were lower [-5.2 (-10.3, -0.1), -4.0 (-7.4, -0.6), -4.7 (-8.9, -0.5), and -4.7 (-10.3, -0.1) mm Hg, respectively, P < 0.05] and fasting plasma glucose concentrations were higher [0.33 mmol/L (0.09, 0.58 mmol/L), P = 0.008] in the protein group. These differences were independent of age, sex, and changes in weight, alcohol intake, or urinary sodium and potassium excretion. Diastolic blood pressure and heart rate, arterial compliance, blood lipids, and serum insulin were not significantly different between the groups. CONCLUSION: Within the context of other studies, these results suggest that modest substitution of carbohydrate-rich foods with protein-rich foods may lower blood pressure in hypertensive persons.

Blood Glucose↗

Metabolizable energy of meat and bone meal from Spanish rendering plants as influenced by level of substitution and method of determination.

Experiments were conducted to determine the MEn of eight meat and bone meal (MBM) samples. Samples averaged (DM basis): 6.01% moisture, 4.25 kcal gross energy (GE)/g, 53.3% CP, 14.5% ether extract (EE), 29.6% ash, 9.2% calcium, and 4.3% phosphorus. Samples of MBM were substituted in a corn basal diet at levels of 6, 12, 18, and 24%. Values of AMEn were determined at each level of substitution and with regression analysis, because, in general, there were no significant deviations from linearity between dietary AMEn and inclusion level. When considering all the samples studied, the average AMEn values determined with substitution at the 6, 12, 18, and 24% levels of inclusion were 2.91, 2.76, 2.67, and 2.75 kcal/g, respectively, the differences not reaching significance (P greater than .05). The TMEn values were determined by Sibbald's fasted cockerel method. Average values of MBM ME were similar whether determined by calculations based on substitution in the diet or by regression of the data (2.75 and 2.69 kcal/g, respectively). These values were similar to TMEn obtained using Sibbald's method (2.74 kcal/g). Most of the differences in MEn among the samples studied could be attributed to differences in GE, although the percentage of GE metabolized [(ME divided by GE) x 100] tended to increase (R2 = .45; P = .069) when EE content in MBM increased.(ABSTRACT TRUNCATED AT 250 WORDS)

Abattoirs↗

The influence of diet on the appearance of new lesions in human coronary arteries.

The Cholesterol Lowering Atherosclerosis Study, a randomized, placebo-controlled trial of blood lipid lowering, demonstrated significant benefit in 2-year coronary angiograms. Using angiograms of subjects in the Cholesterol Lowering Atherosclerosis Study who received a placebo and 24-hour dietary recall data, we performed an epidemiologic study of risk factors for formation of new atherosclerotic lesions. Age and baseline plus on-trial lipid levels, blood pressure levels, and diet variables were included. Significant dietary energy sources were protein, carbohydrate, alcohol, total fat, and polyunsaturated fat. Each quartile of increased consumption of total fat and polyunsaturated fat was associated with a significant increase in risk of new lesions. Increased intake of lauric, oleic, and linoleic acids significantly increased risk. Subjects in the Cholesterol Lowering Atherosclerosis Study in whom new lesions did not develop increased dietary protein to compensate for reduced intake of fat by substituting low-fat meats and dairy products for high-fat meats and dairy products. These results indicate that when total and saturated fat intakes are reduced to levels recommended by the National Cholesterol Education Program, protein and carbohydrate are preferred substitutes for fat calories, rather than monounsaturated or polyunsaturated fat.

Adult↗

Zinc and nitrogen balance in adolescent females fed varying levels of zinc and soy protein.

Zinc and nitrogen balances were determined in 14 girls, 12.5 to 14.5 years of age, during a 30-day period. Diets were composed of ordinary foods and supplied 100% of the Recommended Daily Allowance for protein. The lunch menus were typical of those served in School Lunch Programs except that milk was omitted and calcium supplements were added. The dietary variables were the levels of zinc and the amount of defatted soy which replaced the meat in noon meals. The diets were: S0Z13.4 (13.4 mg zinc and no soy); S30Z13.4 (13.5 mg zinc and 30% of meat replaced by soy); and S30Z7.4 (7.4 mg zinc and 30% of meat replaced by soy). Subjects fed 7.4 mg zinc daily lost significantly (P less than 0.01) less zinc in their feces than the subjects fed the higher level of zinc during the 18-day collection period. Partial substitution of soy for meat in lunch menus did not affect fecal or urinary zinc or nitrogen losses. Mean retentions of zinc by subjects Diets S0Z13.4 nad S30Z7.4 were +0.53, +0.42 and -0.32 mg/day, respectively. Nitrogen retention was not significantly affected by zinc intake. However, nitrogen and zinc retentions were significantly correlated (r = 0.416, P less than 0.015).

Adolescent↗

Calcium, magnesium, phosphorus, copper, and manganese balance in adolescent females.

Calcium, magnesium, phosphorus, copper, and manganese balances were determined in 14 girls (12.5 to 14.5 years of age) during a 30-day period. Menus were composed of ordinary foods and were typical of subjects' usual dietary habits. The diets contained 1.07 g calcium, 193 mg magnesium, 0.85 g phosphorus, 2.8 mg copper, 3.0 mg manganese, and 7.4 or 13.4 mg zinc daily. Defatted soy was substituted for 0, 15, or 30% of the meat in lunch menus. Neither the alteration of dietary zinc levels or the partial substitution of soy for meat significantly affected retention of the five minerals. Retentions of calcium (r = 0.654), magnesium (r = 0.786), phosphorus (r = 0.560), copper (r - 0.805), and manganese (r = 0.855) by subjects were all significantly (P less than 0.001) correlated to retention of zinc. These correlations probably reflect the correlations between fecal losses of calcium (r = 0.438), magnesium (r = 0.434), phosphorus (r = 0.377), copper (r = 0.318), and manganese (r = 0.318) and the volume of feces. On these dietary regimes adolescents were in positive balances for calcium, phosphorus, and copper, but were in negative balances for magnesium and managenese.

Adolescent↗

Polymorphism of the GHR gene in cattle and relationships with meat production and quality.

Growth hormone (GH) exerts its effects on growth and metabolism by interacting with a specific receptor (GHR) on the surface of the target cells. Therefore, GHR has been suggested as candidate gene for traits related to meat production in cattle. The aim of the study was to analyse the polymorphism at position 257 in exon 10 of the GHR gene and investigate relationships with 14 in vivo traits and four meat characteristics in Piemontese animals. The biallelic polymorphism already described was detected using a new PCR procedure. The statistical analysis did not show significant gene substitution effects on growth, size and meat conformation traits. As for meat characteristics, a significant gene substitution of GHR(A) over GHR(G) was observed for drip losses at day 3, with the allele GHR(A) associated with higher values. A significant dominance effect was also observed for this trait. Further investigations in other breeds will be useful for better understanding information on the effect of this GHR polymorphism.

Animals↗

Food groups and laryngeal cancer risk: a case-control study from Italy and Switzerland.

Besides tobacco and alcohol, diet has been thought to be associated with laryngeal cancer risk. We thus analyzed the role of various food groups, as well as specific seasoning fats, in a case-control study conducted in Northern Italy and the Swiss Canton of Vaud from 1992 to 2000. Our study included 527 incident, histologically confirmed cases and 1,297 frequency-matched controls, selected among patients admitted to the same hospitals as cases for acute, nonneoplastic conditions, unrelated to smoking, alcohol consumption and long-term modifications of diet. The subjects' usual diet was investigated through a validated food frequency questionnaire, including 78 foods and beverages. Odds ratios (OR) and 95% confidence intervals (CI) were estimated using unconditional multiple logistic regression models. After adjustment for major confounding factors, a significant trend of increasing risk was observed for eggs (OR = 1.7 for the highest compared to the lowest quintile), red meat (OR = 3.1), processed meat (OR = 1.7), fish (OR = 1.6) and sugars (OR = 1.6). Significant inverse associations were observed for pulses (OR = 0.7), raw vegetables (OR = 0.2), cooked vegetables (OR = 0.3), citrus fruit (OR = 0.6) and other fruit (OR = 0.5). In regard to seasoning fats, a significant reduction of cancer risk was observed for olive oil (OR = 0.4) and specific seed oils (OR = 0.6), while mixed seed oils were directly associated with laryngeal cancer risk (OR = 2.2). Our study suggests that increasing vegetables and fruit, decreasing meat consumption and perhaps substituting olive oil or specific seed oils for other types of seasoning lipids might help reduce laryngeal cancer risk.

Adult↗

Familial concordance of dietary fat practices and intake.

This study examined parent and child dietary fat practices and child dietary fat intake. High- and low-fat practices and percentage of kilocalories from fat were obtained from food records completed by 132 students in the 4th to 6th grades. Parents completed three scales: meat modifications (MMOD); fat substitutions (FSUB); and fruit, juice, and vegetable practices (FJVP). A parent low-fat practices (PLFP) scale was created with the items matching the child low-fat practices (LFPs). Parent PLFP, FSUB, and FJVP were significantly correlated with child LFPs. Parent LFP was a significant predictor of child LFP. Family intervention programs targeting dietary fat behaviors should encourage use of low-fat dietary behaviors.

Adult↗

Effect of ham protein substitution on oxidative stress in older adults.

Mediterranean diet has been related to a low risk of coronary hearth disease. In the present study, we have evaluated the effect of substituting 120 g of meat by 120 g of acorn-fed Iberian ham (one of the meat components of the Mediterranean diet) on body weight, blood pressure (MAP), plasma lipids and oxidant-antioxidant equilibrium in 13 males and 8 females with an average age of 71. Study was performed in three periods: basal diet evaluations (BD1), ham diet for 6 weeks (HD), and basal diet again for 6 weeks (BD2). MAP significantly diminished from 96 mmHg in BD1 to 89 mmHg after HD. After BD2, MAP remained in the same value. Plasma total antioxidant substances increased from 0.791 mmol/L in BD1, to 1.525 in HD, and to 1.213 in BD2. Glutathione reductase significantly increased from 49.5 U/L in BD1 to 57 in HD and decreased to 49.2 in BD2. Glutathione peroxidase rose from 33 U/gHb in BD1 to 72 in HD and decreased to 52 in BD2. Superoxide dismutase increased from 401 U/gHb in BD1 to 723 in HD and decreased to 433 in BD2. Plasma thiobarbituric acid reacting substances (TBARS) fall from 1.65 mmol/l in BD1 to 1.38 in HD and to 1.47 in BD2. TBARS in erythrocyte membranes also diminished but only in BD2. It can be concluded that including acorn-fed Iberian ham in the diet increased the antioxidant substances and decrease lipid peroxidation, with its subsequent beneficial effects on the atherogenic risk factors.

Aged↗

Dietary sodium intake of infants fed commercially prepared baby food and table food.

Sodium intake of infants varies widely with the type of food consumed. However, few reports are available describing the nutrients, including sodium values, of dietary intakes of infants receiving supplemental foods. The purpose of this study was to determine the sodium, energy, and nutrient values of diets for infants from low-income families participating in the WIC program. The sample consisted of 306 infants, aged 4 through 7 months, who were seen in well-child clinics. Approximately 200 of the infants were reportedly fed commercially prepared baby food as the only solid food; 55 received 50% or more of their energy from table foods. The dietary intakes of infants receiving supplemental foods and consuming commercially prepared baby foods included significantly less sodium than the intakes of infants fed primarily table foods. As a group, all infants met the RDAs for most nutrients but had higher sodium values than reported by other researchers. The group of infants for whom consumption of table foods was reported had values above the acceptable range for sodium primarily because the caregivers failed to provide low-sodium, nutrient-dense, supplemental foods in the quantities prescribed but instead substituted sodium-dense meat and vegetable products.

Animals↗

Causes of variation in botulinal inhibition in perishable canned cured meat.

Final internal processing temperatures within the range of 63 to 74 degrees C did not alter the degree of botulinal inhibition in inoculated perishable canned comminuted cured pork abused at 27 degrees C. Adding hemoglobin to the formulation reduced residual nitrite after processing and decreased botulinal inhibition. Different meats yielded different rates of botulinal outgrowth when substituted for fresh pork ham. Pork or beef heart meat showed no inhibition of the Clostridium botulinum inoculum even with a 156-microgram/g amount of sodium nitrite added to the product. This effect appears to be one of stimulating outgrowth, since residual nitrite depletion was not measurably altered.

Animals↗

Relation of meat, fat, and fiber intake to the risk of colon cancer in a prospective study among women.

BACKGROUND: The rates of colon cancer in various countries are strongly correlated with the per capita consumption of red meat and animal fat and, to a lesser degree, inversely associated with the consumption of fiber. METHODS: We conducted a prospective study among 88,751 women 34 to 59 years old and without a history of cancer, inflammatory bowel disease, or familial polyposis who completed a dietary questionnaire in 1980. By 1986, during 512,488 person-years of follow-up, 150 incident cases of colon cancer had been documented. RESULTS: After adjustment for total energy intake, animal fat was positively associated with the risk of colon cancer (P for trend = 0.01); the relative risk for the highest as compared with the lowest quintile was 1.89 (95 percent confidence interval, 1.13 to 3.15). No association was found for vegetable fat. The relative risk of colon cancer in women who ate beef, pork, or lamb as a main dish every day was 2.49 (95 percent confidence interval, 1.24 to 5.03), as compared with those reporting consumption less than once a month. Processed meats and liver were also significantly associated with increased risk, whereas fish and chicken without skin were related to decreased risk. The ratio of the intake of red meat to the intake of chicken and fish was particularly strongly associated with an increased incidence of colon cancer (P for trend = 0.0005); the relative risk for women in the highest quintile of this ratio as compared with those in the lowest quintile was 2.49 (95 percent confidence interval, 1.50 to 4.13). A low intake of fiber from fruits appeared to contribute to the risk of colon cancer, but this relation was not statistically independent of meat intake. CONCLUSIONS: These prospective data provide evidence for the hypothesis that a high intake of animal fat increases the risk of colon cancer, and they support existing recommendations to substitute fish and chicken for meats high in fat.

Adult↗