218 research outputs found
Occurrence and Stability of Aflatoxin M1 in Milk and Milk Products: A Worldwide Review.
This paper critically reviews data from the literature since 1980 on the occurrence of aflatoxin M1 (AFM1) in human and animal milk, infant formula, dried milk, cheese, and yogurt. Furthermore the influence of storage and processing of milk and milk products on the occurrence and stability of AFM1 is reviewed. It is concluded that (i) efforts in attempting to harmonize already existing regulatory limits for AF in foods and feed should be made; (ii) further investigations should verify the influence of milk storage and processing on AFM1 occurrence to avoid uncertainty in actual practice; (iii) the occurrence of AFM1 in animal milks and milk products is widespread, although, considering the current scientific fund, contamination levels do not seem to be a serious health hazard; however, further studies should provide accurate scientific information concerning the human health hazard related to long-term exposure to subchronic AF levels; (iv) monitoring programs should be more extensive and frequent; and (v) in tropical and subtropical countries, especially in African countries, a particular attention should be used in monitoring milk and milk products other than those from cows, as well as feed. Furthermore, extensive and periodic surveys on the occurrence of AF and their metabolite in human breast milk should be performed, since a serious health hazard to mother, fetus, or infants could occur
Dietary strategies to counteract the effects of mycotoxins: a review.
We reviewed various dietary strategies to contain the toxic effects of mycotoxins using antioxidant compounds (selenium, vitamins, provitamins), food components (phenolic compounds, coumarin, chlorophyll and its derivatives, fructose, aspartame), medicinal herbs and plant extracts, and mineral and biological binding agents (hydrated sodium calcium aluminosilicate, bentonites, zeolites, activated carbons, bacteria, and yeast). Available data are primarily from in vitro studies and mainly focus on aflatoxin B1, whereas much less information is available about other mycotoxins. Compounds with antioxidant properties are potentially very efficacious because of their ability to act as superoxide anion scavengers. Interesting results have been obtained by food components contained in coffee, strawberries, tea, pepper, grapes, turmeric, Fava tonka, garlic, cabbage, and onions. Additionally, some medicinal herbs and plant extracts could potentially provide protection against aflatoxin B1 and fumonisin B1. Activated carbons, hydrated sodium calcium aluminosilicate, and bacteria seem to effectively act as binders. We conclude that dietary strategies are the most promising approach to the problem, considering their limited or nil interference in the food production process. Nevertheless, a great research effort is necessary to verify the in vivo detoxification ability of the purposed agents, their mode of action, possible long-term drawbacks of these detoxification-decontamination procedures, and their economical and technical feasibility
Survey of the Occurrence of Aflatoxin M1 in Dairy Products Marketed in Italy
During 1995, 159 samples of milk, 97 samples of dry milk for infant formula, and 114 samples of yogurt were randomly collected in supermarkets and drug stores in four large Italian cities and checked for aflatoxin M1 (AFM1) by immunoaffinity column extraction and HPLC. AFM1 was detected in 136 (86%) of the milk samples (in amounts ranging from1 ng/liter to 108.5 ng/liter; mean level: 10.19 ng/liter), in 81 (84%) of the dry milk samples (in amounts ranging from1 ng/liter to 101.3 ng/kg; mean level: 21.77 ng/kg), and in 91 (80%) of the yogurt samples (in amounts ranging from1 ng/liter to 496.5 ng/liter; mean level: 18.08 ng/liter). Altogether, only two samples of milk, two samples of yogurt, and one sample of dry milk had levels of AFM1 exceeding the Swiss legal limits, which are the most restrictive in the world. AFM1 contamination levels in milk and yogurt samples collected in the period of November to April were ca. four times as high as those in samples collected in the period of May to October. It is concluded that during 1995, despite the widespread occurrence of AFM1, the mean contamination levels in dairy products sold in Italy were not a serious human health hazard
Mediterranean diet adherence in children and adolescents in southern European countries
Abstract Background Over the last decades, a progressive shifting away from traditional healthy dietary patterns, such as the Mediterranean diet, has been observed. The aim of this review was to evaluate evidence on extent and determinants of adherence to the Mediterranean diet among children and adolescents living in southern European countries. Methods A review of scientific articles published over the last 15 years conducted on dietary habits and determinants of adherence to the Mediterranean diet in the target population was performed. Cross-sectional surveys conducted in Spain, Greece, and Italy were selected. Results Irrespectively of the tool used, adherence to the Mediterranean diet was mainly poor in roughly half of the populations investigated. Major determinants of adherence were social and demographic factors. Among the former, high socioeconomic and cultural status of participants' parents (especially mothers) were associated with higher adherence. In most of countries, also living in rural areas was a determinant of high adherence. There was no consistent association with metabolic status, as most of the associations with health-related outcomes were mediated by other key variables, such as sedentary behaviors and engagement in physical activities. Conclusions There is a need for nutrition education programs to establish healthy eating habits at a young age. Targets for such intervention should not be limited to children and adolescents but also include parents, teachers, and physicians
Activated carbons : In vitro affinity for ochratoxin A and deoxynivalenol and relation of adsorption ability to physicochemical parameters
In vitro affinity tests were conducted to test the effectiveness of 19 activated carbons (ACs), hydrates sodium calcium aluminosilicate (HSCAS) and sepiolite (S) in binding ochratoxin A (OA) and deoxynivalenol (DON) from solution. Relationships between adsorption ability and physicochemical parameters of ACs (surface area, iodine number, methylene blue index) were tested. When 5 ml of a 4-micrograms/ml aqueous solution of OA was treated with 2 mg of AC, the ACs adsorbed 0.80 to 99.86% of the OA. HSCAS and S were not effective in binding OA. In two saturation tests carried out with increased amounts of OA (5 ml of 10-and 50-micrograms/ml aqueous solutions of OA, respectively) three ACs also showed high adsorption ability (adsorbing 92.23 to 96.57% of the OA). When 5 ml of a 4-micrograms/ml aqueous solution of DON was treated with 10 mg of AC, ACs adsored 1.83 to 98.93% of the DON. HSCAS and S were not effective in binding DON. An overall relation of adsorption ability to the physicochemical parameters of ACs was observed. The methylene blue index was more reliable than iodine number and surface area in predicting ability of ACs to adsorb OA and DON. Based on the data observed on the xxxxx eh present study as well as on aflatoxin B1 and fumonisin B1 from previous studies, it is concluded that ACs have high in vitro affinity for chemically different mycotoxins, and can be considered as potential multi-mycotoxin-sequestering agents. However, the ability to bind the main mycotoxins singly or in combination should be confirmed by in vivo investigations. Moreover, information on the amounts of AC to be added to feeds, and on the possible long-term effect on absorption of essential nutrients are needed
Reduction of Carryover of Aflatoxin from Cow Feed to Milk by Addition of Activated Carbons.
According to a double-reversal experimental design on 12 late-lactation Friesian cows the effect of two activated carbons (ACs) (CAC1 and CAC2) and a hydrated sodium calcium aluminosilicate (HSCAS) on carryover of aflatoxin B1 (AFB1) from feed to aflatoxin M1 (AFM1) in milk was determined. Cows were fed a basal diet containing AFB1 naturally contaminated corn meal and copra, During week 1 cows were fed diets containing AFB1 alone (11.28 ÎĽg of AFB1/kg of feed); in week 2 the diets contained AFB1 plus 2.0% sorbent; and in week 3 the diets again contained AFB1 alone (13.43 ÎĽg of AFB1/kg of feed). ACs reduced the analytical content of AFB1 in the pelleted feed by from 40.6% to 73.6%, whereas reduction by HSCAS was 59.2%, The AFM1 concentrations in milk in weeks 1 and 3 were higher than that in week 2, Decreases in the AFM1 excreted in the milk by addition to feed of 2% of the sorbents ranged from 22% to 45%. CAC1 and HSCAS were significantly different from each other in reducing the AFM1concentration in milk (45.3% versus 32.5%); these reductions were significantly higher than that of CAC2 (22.0%). Carryover reduction by addition of CAC1 (50%) was significantly higher than that of HSCAS (36%). Addition of 2% CAC2 did not allow pelleting of feed because of the caking action of this carbon, The lower performance of CAC2 could be related to the unsuccessful pelleting. The addition of ACs did not influence feed intake, milk production, milk composition, or body weight. Our results suggest that ACs, high-affinity sorbents for AFB1 in vitro, are efficacious in reducing AFB1 carryover from cow feed to milk. Further in vivo investigations should establish lower amounts of ACs which can be efficacious
In-vitro screening ofSaccharomyces strains for ochratoxin A removal from liquid medium
The aptitude of twentySaccharomyces sensu stricto strains to remove ochratoxin A from a synthetic medium containing 1.1 ng/mL, about half of the European Community limit, was evaluated using four to six mg of biomass (wet weight)/mL. Seven satins show high levels of ochratoxin A removal, 0.72-1.10 ng/mL, equivalent to 66–100% of the available toxin, and unitary removing ativity of 14.31–27.24 pg/mg of biomass. Further research will be carried out to study the mechanism of OTA removal and to confirm the ability of the most efficacious strains ofSaccharomyces sensu stricto to remove OTA from contaminated wort and grape must during alcoholic fermentation
Very low-calorie ketogenic diet (VLCKD): indicazioni ed efficacia nel trattamento dell'obesitĂ
SommarioLa very low-calorie ketogenic diet (VLCKD) è un protocollo alimentare fortemente ipocalorico e ipoglucidico che ha il fine di indurre la chetosi. Rispetto a una dieta ipocalorica tradizionale è vantaggiosa sulla fame, sul mantenimento della muscolatura, sull'infiammazione e sul decremento ponderale. Può essere attuata anche mediante l'utilizzo di prodotti sostitutivi in concomitanza a un percorso di educazione alimentare. La VLCKD rappresenta una valida opzione terapeutica nel trattamento dell'obesitĂ
Factors associated with metabolic syndrome in a Mediterranean population : role of caffeinated beverages
BACKGROUND: Intake of caffeinated beverages, such as coffee and tea, has been related to improvements in components of metabolic syndrome (MetS), but studies conducted in the Mediterranean region are scarce. The aim of this study was to evaluate whether or not consumption of a variety of beverages containing caffeine was associated with components of MetS in an Italian population. METHODS: From May 2009 to December 2010, a cross-sectional survey was conducted on 1889 inhabitants living in Sicily, southern Italy. Data regarding demographic characteristics, habitual beverage intake, and adherence to the Mediterranean diet were collected, and clinical information was retrieved from the general practitioners’ computer records. RESULTS: After adjusting for all covariates, coffee (odds ratio [OR] 0.43, 95% confidence interval [CI] 0.27–0.70) and tea (OR 0.51, 95% CI 0.34–0.78) were associated with MetS, whereas no association was observed between caffeine intake and MetS. Among other factors, age, body mass index, physical activity, current smoking, and adherence to Mediterranean diet were associated with having MetS. Triglycerides were inversely associated with consumption of both espresso coffee and tea. The healthy effects of such beverages were more evident in individuals with unhealthy dietary habits. CONCLUSIONS: Although no direct association between caffeine intake and MetS or its components was observed, coffee and tea consumption was significantly related to reduced odds of MetS
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