RESUMO
BACKGROUND: Structure and protein-starch interactions in pasta products can be responsible for lower postprandial glycemic responses compared with other cereal foods. OBJECTIVES: We tested the effect on postprandial glucose metabolism induced by 2 pasta products, couscous, and bread, through their structural changes during mastication and simulated gastric digestion. METHODS: Two randomized controlled trials (n = 30/trial) in healthy, normal-weight adults (mean BMI of 23.9 kg/m2 (study 1) and 23.0 kg/m2 (study 2)) evaluated postprandial glucose metabolism modulation to portions of durum wheat semolina spaghetti, penne, couscous, and bread each containing 50 g available carbohydrate. A mastication trial involving 26 normal-weight adults was conducted to investigate mastication processes and changes in particle size distribution and microstructure (light microscopy) of boluses after mastication and in vitro gastric digestion. RESULTS: Both pasta products resulted in lower areas under the 2-h curve for blood glucose (-40% for spaghetti and -22% for penne compared with couscous; -41% for spaghetti and -30% for penne compared with bread), compared with the other grain products (P < 0.05). Pasta products required more chews (spaghetti: 34 ± 18; penne: 38 ± 20; bread: 27 ± 13; couscous: 24 ± 17) and longer oral processing (spaghetti: 21 ± 13 s; penne: 23 ± 14 s; bread: 18 ± 9 s; couscous: 14 ± 10 s) compared with bread or couscous (P < 0.01). Pastas contained more large particles (46-67% of total particle area) compared with bread (0-30%) and couscous (1%) after mastication and in vitro gastric digestion. After in vitro gastric digestion, pasta samples still contained large areas of nonhydrolyzed starch embedded within the protein network; the protein in bread and couscous was almost entirely digested, and the starch was hydrolyzed. CONCLUSIONS: Preservation of the pasta structure during mastication and gastric digestion explains slower starch hydrolysis and, consequently, lower postprandial glycemia compared with bread or couscous prepared from the same durum wheat semolina flour in healthy adults. The postprandial in vivo trials were registered at clinicaltrials.gov as NCT03098017 and NCT03104686.
Assuntos
Glucose , Insulina , Mastigação , Período Pós-Prandial , Adulto , Humanos , Glicemia/metabolismo , Pão , Glucose/metabolismo , Insulina/metabolismo , Amido/metabolismo , Triticum/química , RefeiçõesRESUMO
BACKGROUND: Structure and protein-starch interactions in pasta products can be responsible for lower postprandial glycemic responses compared with other cereal foods. OBJECTIVES: We tested the effect on postprandial glucose metabolism induced by 2 pasta products, couscous, and bread, through their structural changes during mastication and simulated gastric digestion. METHODS: Two randomized controlled trials (n = 30/trial) in healthy, normal-weight adults (mean BMI of 23.9 kg/m2 (study 1) and 23.0 kg/m2 (study 2)) evaluated postprandial glucose metabolism modulation to portions of durum wheat semolina spaghetti, penne, couscous, and bread each containing 50 g available carbohydrate. A mastication trial involving 26 normal-weight adults was conducted to investigate mastication processes and changes in particle size distribution and microstructure (light microscopy) of boluses after mastication and in vitro gastric digestion. RESULTS: Both pasta products resulted in lower areas under the 2-h curve for blood glucose (-40% for spaghetti and -22% for penne compared with couscous; -41% for spaghetti and -30% for penne compared with bread), compared with the other grain products (P < 0.05). Pasta products required more chews (spaghetti: 34 ± 18; penne: 38 ± 20; bread: 27 ± 13; couscous: 24 ± 17) and longer oral processing (spaghetti: 21 ± 13 s; penne: 23 ± 14 s; bread: 18 ± 9 s; couscous: 14 ± 10 s) compared with bread or couscous (P < 0.01). Pastas contained more large particles (46-67% of total particle area) compared with bread (0-30%) and couscous (1%) after mastication and in vitro gastric digestion. After in vitro gastric digestion, pasta samples still contained large areas of nonhydrolyzed starch embedded within the protein network; the protein in bread and couscous was almost entirely digested, and the starch was hydrolyzed. CONCLUSIONS: Preservation of the pasta structure during mastication and gastric digestion explains slower starch hydrolysis and, consequently, lower postprandial glycemia compared with bread or couscous prepared from the same durum wheat semolina flour in healthy adults.The postprandial in vivo trials were registered at clinicaltrials.gov as NCT03098017 and NCT03104686.
Assuntos
Glucose , Insulinas , Adulto , Glicemia/metabolismo , Pão , Glucose/metabolismo , Humanos , Insulina , Mastigação , Amido/metabolismo , Triticum/químicaRESUMO
Development of gluten-free (GF) pasta with improved nutritional attributes is one of the main trends in the gluten-free pasta industry. Considerable interest lays in introducing legume-based ingredients into traditional corn/rice GF formulations. This work aims to fortify multi-cereal (corn-rice) GF pasta with chickpea to investigate how different chickpea addition levels affect its quality and in vitro starch digestibility. Chickpea significantly increased pasta protein and dietary fibre contents to a level that supports the "source" or "high" fibre/protein content claims. Chickpea addition induced darkening, softening, adhesiveness decrease and solid loss reduction compared to the control. In addition, chickpea substitution significantly modified the in vitro starch digestion, which showed increasing resistant starch and decreasing slowly digestible starch contents suggesting potential mitigation of postprandial glucose response in vivo. Reformulating GF pasta with chickpea flour should, therefore, be considered as an effective tool to improve the corn-rice-based GF products' nutritional profile.
Assuntos
Cicer , Oryza , Culinária , Dieta Livre de Glúten , Farinha/análise , Oryza/metabolismo , Amido/metabolismo , Zea mays/metabolismoRESUMO
PURPOSE: Coffee is an important source of bioactive compounds, including caffeine, trigonelline, and phenolic compounds. Several studies have highlighted the preventive effects of coffee consumption on major cardiometabolic (CM) diseases, but the impact of different coffee dosages on markers of CM risk in a real-life setting has not been fully understood. This study aimed to investigate the effect of coffee and cocoa-based confectionery containing coffee consumption on several CM risk factors in healthy subjects. METHODS: In a three-arm, crossover, randomized trial, 21 volunteers were assigned to consume in a random order for 1 month: 1 cup of espresso coffee/day, 3 cups of espresso coffee/day, and 1 cup of espresso coffee plus 2 cocoa-based products containing coffee, twice per day. At the last day of each treatment, blood samples were collected and used for the analysis of inflammatory markers, trimethylamine N-oxide, nitric oxide, blood lipids, and markers of glucose/insulin metabolism. Moreover, anthropometric parameters and blood pressure were measured. Finally, food consumption during the interventions was monitored. RESULTS: After 1 month, energy intake did not change among treatments, while significant differences were observed in the intake of saturated fatty acids, sugars, and total carbohydrates. No significant effect on CM markers was observed following neither the consumption of different coffee dosages nor after cocoa-based products containing coffee. CONCLUSIONS: The daily consumption of common dosages of coffee and its substitution with cocoa-based products containing coffee showed no effect on CM risk factors in healthy subjects. TRIAL REGISTRATION NUMBER: Registered at clinicaltrials.gov as NCT03166540, May 21, 2017.
Assuntos
Cacau , Doenças Cardiovasculares , Chocolate , Doces , Doenças Cardiovasculares/epidemiologia , Doenças Cardiovasculares/prevenção & controle , Café , Estudos Cross-Over , HumanosRESUMO
BACKGROUND AND AIMS: Post-prandial glycemic response (PPGR) depends on the intrinsic characteristic of the carbohydrate-rich foods as well as on the amount and type of other nutrients. This study aimed to explore whether the addition of condiments can affect the difference in PPGR between a low and a medium-high Glycemic Index (GI) food. METHODS AND RESULTS: Spaghetti (S) and rice ® were consumed plain and after adding tomato sauce and extra virgin olive oil (TEVOO), or pesto sauce (P). The GI of R (63 ± 3) was statistically higher than that of S (44 ± 7) (p = 0.003). The Incremental Area Under the Curve (IAUC) for R was significantly greater than S (124.2 ± 12.1 and 82.1 ± 12.9 mmol∗min/L respectively) (p = 0.016) for blood glucose but not for insulin (1192.6 ± 183.6 and 905.2 ± 208.9 mU∗min/L, respectively) (p = 0.076). There were no significant differences after the addition of either TEVOO or P. The postprandial peaks of blood glucose and insulin for R (6.7 ± 0.3 mmol/L and 36.4 ± 4.9 mU/L, respectively) were significantly higher compared to S (6.0 ± 0.2 mmol/L and 26.7 ± 3.6 mU/L, respectively) (p = 0.033 and p = 0.025). The postprandial peak for insulin remained significantly higher with P (36.8 ± 3.7 and 28.6 ± 2.9 mU/L for R + P and S + P, p = 0.045) but not with EVOO (p = 0.963). Postprandial peaks for blood glucose were not significantly different with condiment. CONCLUSIONS: The differences in PPGR were significant between spaghetti and rice consumed plain, they reduced or disappeared with fat adding, depending on the type of condiment used. REGISTRATION NUMBER: (www.clinicaltrial.gov):NCT03104712.
Assuntos
Glicemia/metabolismo , Condimentos , Carboidratos da Dieta , Gorduras na Dieta , Índice Glicêmico , Insulina/sangue , Oryza , Período Pós-Prandial , Adulto , Biomarcadores/sangue , Estudos Cross-Over , Feminino , Frutas , Humanos , Itália , Solanum lycopersicum , Masculino , Azeite de Oliva , Fatores de Tempo , Adulto JovemRESUMO
Sub-Saharan region is often characterized by food and nutrition insecurity especially "hidden hunger" which results from inadequate micronutrients in diets. African indigenous leafy vegetables (AILVs) can represent a valid food source of micronutrients, but they often go to waste resulting in post-harvest losses. In an attempt to prolong AILVs shelf-life while enhancing their nutritional quality, fermentation was studied from a microbiological and nutritional point of view. Pumpkin leaves (Cucurbita sp.) were spontaneously fermented using the submerged method with 3% NaCl and 3% sucrose. Controls were set up, consisting of leaves with no additions. During fermentation, samples of both treatments were taken at 0, 24, 48, 72 and 168 h to monitor pH and characterize the microbial population through culture-based and molecular-based analyses. Variations between fresh and treated leaves in B-group vitamins, carotenoids, polyphenols, and phytic acid were evaluated. Data revealed that the treatment with addition of NaCl and sucrose hindered the growth of undesired microorganisms; in controls, unwanted microorganisms dominated the bacterial community until 168 h, while in treated samples Lactobacillaceae predominated. Furthermore, the content in folate, ß-carotene and lutein increased in treated leaves compared to the fresh ones, while phytic acid diminished indicating an amelioration in the nutritional value of the final product. Thus, fermentation could help in preserving Cucurbita sp. leaves, avoiding contamination of spoilage microorganisms and enhancing the nutritional values.
Assuntos
Cucurbita/química , Alimentos Fermentados/análise , Folhas de Planta/química , Verduras/química , Carotenoides/análise , Carotenoides/metabolismo , Cucurbita/microbiologia , Fermentação , Alimentos Fermentados/microbiologia , Segurança Alimentar , Lactobacillaceae/metabolismo , Valor Nutritivo , Folhas de Planta/microbiologia , Verduras/microbiologia , Vitaminas/análise , Vitaminas/metabolismoRESUMO
The amount of amylose within a food may elicit lower glycemic and insulin postprandial responses and thus potentially modulate the satiating effect. In this context, the effect of biscuits formulated with high amylose starch (HAS) flour on satiety-related sensations and food intake was studied. Three types of biscuits were produced: control biscuit (CRT, 0% of HAS), Amy-25 (25% HAS), and Amy-50 (50% HAS). Fifteen healthy volunteers were enrolled to conduct two in vivo experiments. In experiment 1, volunteers consumed biscuits ad libitum and their sensations of satiety and food intake were evaluated. In experiment 2, volunteers received a quantity of biscuits equivalent to the 20% of the daily estimated energy requirements, and both satiety-related sensations and food intake were checked at subsequent meal. The Amy-50 significantly reduced food intake at subsequent meal (p Ë 0.05), compared to Amy-25 and CRT. The satiety-related sensations were not significantly affected in both experiments, excepted for intra-meal hunger variation induced by Amy-25 which resulted significantly higher (p Ë 0.05) than Amy-50 and CRT. These findings support the need to reformulate carbohydrate rich foods commonly consumed in a dietary context, to provide consumers healthier alternatives to prevent and tackle obesity and related chronic diseases.
Assuntos
Amilose , Ingestão de Alimentos , Farinha , Saciação , Zea mays , Estudos Cross-Over , Ingestão de Energia , Humanos , Período Pós-Prandial , SensaçãoRESUMO
Multiple factors may affect the metabolic fate of carbohydrates. Today, well-standardised and accepted methods may allow for the definitions of the changes in the glucose and insulin curves following the ingestion of either carbohydrate-based and other foods. More debate is still raised on the clinical meaning of these classifications when used at a population level, while emphasis is raised on the approach to carbohydrate metabolism on an individual basis. Within these ranges of applications, other compounds, such as plant polyphenols, may favourably add synergic effects through the modulation of carbohydrate digestion and glucose metabolic steps, resulting in lowering postprandial glucose and insulin levels. Finally, a growing knowledge suggests that the balance of dietary fructose and individual physical activity represent the key point to address the compound towards either positive, energy sparing effects, or a degenerative metabolic burden. The carbohydrate quality within a whole dietary and lifestyle pattern may therefore challenge the individual balance towards health or disease.
Assuntos
Carboidratos da Dieta/administração & dosagem , Índice Glicêmico , Glicemia , Dieta , Frutose , Humanos , Metabolismo dos Lipídeos , Refeições , Ciências da Nutrição , Período Pós-Prandial , PesquisaRESUMO
PURPOSE: The quality of the study design and data reporting in human trials dealing with the inter-individual variability in response to the consumption of plant bioactives is, in general, low. There is a lack of recommendations supporting the scientific community on this topic. This study aimed at developing a quality index to assist the assessment of the reporting quality of intervention trials addressing the inter-individual variability in response to plant bioactive consumption. Recommendations for better designing and reporting studies were discussed. METHODS: The selection of the parameters used for the development of the quality index was carried out in agreement with the scientific community through a survey. Parameters were defined, grouped into categories, and scored for different quality levels. The applicability of the scoring system was tested in terms of consistency and effort, and its validity was assessed by comparison with a simultaneous evaluation by experts' criteria. RESULTS: The "POSITIVe quality index" included 11 reporting criteria grouped into four categories (Statistics, Reporting, Data presentation, and Individual data availability). It was supported by detailed definitions and guidance for their scoring. The quality index score was tested, and the index demonstrated to be valid, reliable, and responsive. CONCLUSIONS: The evaluation of the reporting quality of studies addressing inter-individual variability in response to plant bioactives highlighted the aspects requiring major improvements. Specific tools and recommendations favoring a complete and transparent reporting on inter-individual variability have been provided to support the scientific community on this field.
Assuntos
Variação Biológica da População/fisiologia , Confiabilidade dos Dados , Dieta Vegetariana/métodos , Compostos Fitoquímicos/farmacologia , Projetos de Pesquisa , Dieta Vegetariana/tendências , Humanos , Compostos Fitoquímicos/administração & dosagem , Plantas Comestíveis , Reprodutibilidade dos TestesRESUMO
Cyclopropane fatty acids (CPFAs) are the most abundant cyclic fatty acids in microorganisms with unknown role(s) regarding their dietary relevance and biological effects in humans. This work was aimed to draw up a list of CPFAs-containing foods for estimating their dietary intake in the Italian population to provide a basis for evaluating their nutritional relevance and potential health-related effects. The CPFAs content of more than 500 food items was investigated and a preliminary dietary intake was assessed (12.0 ± 6.0 mg/day), based on the data reported by the Italian National Food Consumption Survey INRAN-SCAI 2005-06. CPFAs should be considered of dietary relevance in view of their potential physiological activity in humans and their presence in significant amounts in dairy products, as Grana Padano cheese (9.0-30.0 mg/100 g), and in bovine meat (0.7-4.0 mg/100 g). Future studies should elucidate whether this uncommon class of fatty acids has a biological role in human health.
Assuntos
Ciclopropanos/análise , Dieta , Ácidos Graxos/análise , Queijo , Laticínios , Humanos , Itália , RhizophoraceaeRESUMO
OBJECTIVES: The involvement of the gut microbiota in the pathogenesis of calcium nephrolithiasis has been hypothesised since the discovery of the oxalate-degrading activity of Oxalobacter formigenes, but never comprehensively studied with metagenomics. The aim of this case-control study was to compare the faecal microbiota composition and functionality between recurrent idiopathic calcium stone formers (SFs) and controls. DESIGN: Faecal samples were collected from 52 SFs and 48 controls (mean age 48±11). The microbiota composition was analysed through 16S rRNA microbial profiling approach. Ten samples (five SFs, five controls) were also analysed with deep shotgun metagenomics sequencing, with focus on oxalate-degrading microbial metabolic pathways. Dietary habits, assessed through a food-frequency questionnaire, and 24-hour urinary excretion of prolithogenic and antilithogenic factors, including calcium and oxalate, were compared between SFs and controls, and considered as covariates in the comparison of microbiota profiles. RESULTS: SFs exhibited lower faecal microbial diversity than controls (Chao1 index 1460±363vs 1658±297, fully adjusted p=0.02 with stepwise backward regression analysis). At multivariate analyses, three taxa (Faecalibacterium, Enterobacter, Dorea) were significantly less represented in faecal samples of SFs. The Oxalobacter abundance was not different between groups. Faecal samples from SFs exhibited a significantly lower bacterial representation of genes involved in oxalate degradation, with inverse correlation with 24-hour oxalate excretion (r=-0.87, p=0.002). The oxalate-degrading genes were represented in several bacterial species, whose cumulative abundance was inversely correlated with oxaluria (r=-0.85, p=0.02). CONCLUSIONS: Idiopathic calcium SFs exhibited altered gut microbiota composition and functionality that could contribute to nephrolithiasis physiopathology.
Assuntos
Microbioma Gastrointestinal/fisiologia , Nefrolitíase/microbiologia , Adulto , Idoso , Bactérias/classificação , Bactérias/isolamento & purificação , Técnicas de Tipagem Bacteriana , Biodiversidade , Oxalato de Cálcio/análise , Estudos de Casos e Controles , DNA Bacteriano/análise , Ingestão de Energia/fisiologia , Fezes/microbiologia , Feminino , Humanos , Masculino , Metagenômica/métodos , Pessoa de Meia-Idade , Nefrolitíase/metabolismo , Oxalatos/metabolismo , RNA Ribossômico 16S/análise , Recidiva , Adulto JovemRESUMO
Breakfast foods with lower glycaemic responses are associated with better body weight control. Glycaemic index (GI) values of some commonly consumed breakfast foods in Italy were determined and compared, along with macronutrients. Cakes/pastries were low-medium GI (44-60), with high-sugar and saturated fat and low-fibre. Generally, mueslis and breads were medium GI (62-66 and 59-76, respectively) with higher fibre and lower saturated fat and sugar. The addition of spreads to bread lowered GI (47-66) but increased sugar and saturated fat.
Assuntos
Desjejum , Análise de Alimentos , Índice Glicêmico , Adolescente , Adulto , Idoso , Pão , Carboidratos da Dieta , Gorduras na Dieta , Fibras na Dieta , Grão Comestível , Feminino , Humanos , Itália , Masculino , Pessoa de Meia-Idade , Avaliação Nutricional , Adulto JovemRESUMO
BACKGROUND: Emerging evidence suggests that specific (poly)phenols may constitute new preventative strategies to counteract cell oxidative stress and myocardial tissue inflammation, which have a key role in the patho-physiology of diabetic cardiomyopathy. In a rat model of early diabetes, we evaluated whether in vivo administration of urolithin A (UA) or urolithin B (UB), the main gut microbiota phenolic metabolites of ellagitannin-rich foods, can reduce diabetes-induced microenvironmental changes in myocardial tissue, preventing cardiac functional impairment. METHODS: Adult Wistar rats with streptozotocin-induced type-1 diabetes (n = 29) were studied in comparison with 10 control animals. Diabetic rats were either untreated (nâ = â9) or subjected to daily i.p. injection of UA (n = 10) or UB (n = 10). After 3 weeks of hyperglycaemia, hemodynamics, cardiomyocyte contractile properties and calcium transients were measured to assess cardiac performance. The myocardial expression of the pro-inflammatory cytokine fractalkine and proteins involved in calcium dynamics (sarcoplasmic reticulum calcium ATPase, phospholamban and phosphorylated phospholamban) were evaluated by immunoblotting. Plasma, urine and tissue distribution of UA, UB and their phase II metabolites were determined. RESULTS: In vivo urolithin treatment reduced by approximately 30% the myocardial expression of the pro-inflammatory cytokine fractalkine, preventing the early inflammatory response of cardiac cells to hyperglycaemia. The improvement in myocardial microenvironment had a functional counterpart, as documented by the increase in the maximal rate of ventricular pressure rise compared to diabetic group (+18% and +31% in UA and UB treated rats, respectively), and the parallel reduction in the isovolumic contraction time (-12%). In line with hemodynamic data, both urolithins induced a recovery of cardiomyocyte contractility and calcium dynamics, leading to a higher re-lengthening rate (+21%, on average), lower re-lengthening times (-56%), and a more efficient cytosolic calcium clearing (-32% in tau values). UB treatment also increased the velocity of shortening (+27%). Urolithin metabolites accumulated in the myocardium, with a higher concentration of UB and UB-sulphate, potentially explaining the slightly higher efficacy of UB administration. CONCLUSIONS: In vivo urolithin administration may be able to prevent the initial inflammatory response of myocardial tissue to hyperglycaemia and the negative impact of the altered diabetic milieu on cardiac performance.
Assuntos
Cumarínicos/farmacologia , Diabetes Mellitus Experimental/prevenção & controle , Cardiopatias/prevenção & controle , Hiperglicemia/prevenção & controle , Animais , Diabetes Mellitus Experimental/metabolismo , Hiperglicemia/metabolismo , Masculino , Contração Miocárdica/efeitos dos fármacos , Miocárdio/metabolismo , Miócitos Cardíacos/metabolismo , Ratos Wistar , ATPases Transportadoras de Cálcio do Retículo Sarcoplasmático/metabolismo , EstreptozocinaRESUMO
PURPOSE: Urolithins are bioactive ellagitannin-derived metabolites showing a wide phenotypic variation in their production by the gut microbiota. This work represents a first in vitro step toward the development of new strategies focused on the oral supplementation of urolithins with the aim of overcoming their selective production and making their putative health benefits available for the whole population. METHODS: In order to study their gastrointestinal stability, urolithin A, urolithin B, and urolithin B-glucuronide, as well as ellagic acid, were subjected to a simulated gastrointestinal digestion model consisting of oral, gastric, and pancreatic steps followed by a 24-h fecal fermentation. The effect of the entero-hepatic recirculation on urolithin B-glucuronide, a phase II metabolite, was also investigated. RESULTS: Urolithin B was the molecule able to resist to a greater extent the conditions of the gastrointestinal tract, while urolithin A and ellagic acid were drastically unstable during the colonic step. Conjugation with glucuronic acid, ideally occurring in the liver, conferred to urolithin B an increased stability, which may be interesting in the framework of entero-hepatic recirculation. CONCLUSION: This set of experiments lets hypothesize that orally supplemented urolithins may come into contact with the colonic epithelium and become accessible for uptake or exert local anti-inflammatory activity, overcoming the limitations of enterotypes unable to convert ellagitannins into these putatively beneficial metabolites.
Assuntos
Cumarínicos/metabolismo , Microbioma Gastrointestinal , Trato Gastrointestinal/microbiologia , Taninos Hidrolisáveis/metabolismo , Fenômenos Químicos , Colo/metabolismo , Colo/microbiologia , Digestão , Ácido Elágico/metabolismo , Fezes/microbiologia , Fermentação , Trato Gastrointestinal/metabolismo , Glucuronídeos/metabolismo , Humanos , Modelos BiológicosRESUMO
The Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico is a five-century institution that, besides the unique clinical role in the center of Milan, may rely on benefactor donations such as fields and farming houses not far from the city, for a total of 8500 ha, all managed by the "Sviluppo Ca' Granda' Foundation". Presently, the main products of these fields are represented by rice and cow's milk. During the latest years, farmers and managers have developed a model of sustainable food production, with great attention to the product quality based on compositional analysis and functional nutritional characteristics. This experience represents a new holistic model of food production and consumption, taking great care of both sustainability and health.
Assuntos
Conservação dos Recursos Naturais , Produção Agrícola/métodos , Indústria de Laticínios/métodos , Qualidade dos Alimentos , Nível de Saúde , Modelos Biológicos , Animais , Bovinos , Conservação dos Recursos Naturais/economia , Conservação dos Recursos Naturais/tendências , Produção Agrícola/economia , Produção Agrícola/educação , Produção Agrícola/tendências , Produtos Agrícolas/química , Produtos Agrícolas/crescimento & desenvolvimento , Indústria de Laticínios/economia , Indústria de Laticínios/educação , Indústria de Laticínios/tendências , Fundações , Saúde Global , Índice Glicêmico , Promoção da Saúde , Humanos , Itália , Leite/química , Estudos de Casos Organizacionais , Oryza/química , Oryza/crescimento & desenvolvimento , Avaliação de Programas e Projetos de Saúde , Sementes/química , Sementes/crescimento & desenvolvimentoRESUMO
PURPOSE: Gluten-free products present major challenges for the food industry in terms of organoleptic, technological and nutritional characteristics. The absence of gluten has been shown to affect starch digestibility, thus increasing the postprandial glycaemic response. However, in recent years, gluten-free technologies have been improved, thus possibly modifying this quality parameter. We investigated the glycaemic index (GI) of 10 commercial foods aiming to update the GI values of the most common gluten-free products consumed in Italy. METHODS: The in vivo GI was evaluated for six bakery products and four types of pasta. The postprandial glucose response was obtained in two groups with 10 healthy volunteers each. RESULTS: The overall GI values ranged from 37.5 for breakfast biscuits to 66.7 for puffed multigrain cake. Breads and pasta had GI values consistently lower than those previously reported in the literature. CONCLUSION: The present study showed that several commercial GF products exhibited low and medium GI values, not confirming the previous observations on the high GI of GF. However, considering the multiple formulations and processes for preparation of these products, further studies are recommended.
Assuntos
Dieta Livre de Glúten , Alimentos Especializados , Índice Glicêmico , Adulto , Idoso , Glicemia/análise , Índice de Massa Corporal , Pão , Grão Comestível , Feminino , Humanos , Itália , Masculino , Pessoa de Meia-Idade , Período Pós-PrandialRESUMO
Food processing may induce thermal degradation of fumonisins in corn via Maillard-type reactions, or alkaline hydrolysis via loss of the two tricarballylic acid moieties. In the former case, N-(1-deoxy-D-fructos-1-yl)-fumonisin B(1) (NDF) can be formed, while the latter derivative is called hydrolysed fumonisin B(1) (HFB(1)). The aim of this study was to deepen the knowledge about the gastrointestinal stability of HFB(1) and NDF in humans. Due to the lack of standard, NDF was chemically synthesised and cleaned up in high purity to be used for further experiments. While NDF is already partially cleaved (about 41%) during simulated digestion, it remained rather stable towards human colon microflora. In contrast to this, HFB(1) is partially metabolised by the colon microflora to unknown compounds after 24 h of fermentation, as seen by a loss of about 22%. Concluding, the cleavage of NDF during digestion as well as the likely metabolisation of HFB(1) emphasise the need for animal trials to ascertain their toxicity in vivo.
Assuntos
Fumonisinas/química , Trato Gastrointestinal/efeitos dos fármacos , Cromatografia Líquida , Fermentação , Contaminação de Alimentos , Manipulação de Alimentos , Microbiologia de Alimentos , Trato Gastrointestinal/microbiologia , Humanos , Hidrólise , Modelos Biológicos , Espectrometria de Massas em Tandem , Ácidos Tricarboxílicos , Zea mays/química , Zea mays/microbiologiaRESUMO
In the present study, the colonic metabolism of three curcuminoids (80.1% curcumin, 15.6%, demethoxycurcumin (DMC) and 2.6% bis-demethoxycurcumin (Bis-DMC)) was evaluated using an in vitro model containing human faecal starters. The breakdown products formed were identified and characterized using different analytical platforms. Following in vitro incubation, the relative amounts of degraded curcuminoids and the produced metabolites were analyzed using a UHPLC coupled with a linear ion trap mass spectrometer, with the addition of hybrid ion trap-Orbitrap Mass Spectrometer when required. Up to â¼24% of curcumin, â¼61% of demethoxycurcumin (DMC) and â¼87% of bis-demethoxycurcumin (Bis-DMC) were degraded by the human faecal microbiota after 24 h of fermentation in vitro. Three main metabolites, namely tetrahydrocurcumin (THC), dihydroferulic acid (DFA) and a metabolite with an accurate mass of 181.08734, which was tentatively identified as 1-(4-Hydroxy-3-methoxyphenyl)-2-propanol were detected in the fermentation cultures containing the curcuminoids. The data presented here provide insights into curcuminoid colonic metabolism, showing that bacterial breakdown products should be considered in further studies on both bioavailability bioactivity of curcumin.
Assuntos
Colo/metabolismo , Curcumina/metabolismo , Fezes/microbiologia , Fermentação , Curcumina/análogos & derivados , Voluntários Saudáveis , Humanos , Modelos BiológicosRESUMO
Milk has become a staple food product globally. Traditionally, milk quality assessment has been primarily focused on hygiene and composition to ensure its safety for consumption and processing. However, in recent years, the concept of milk quality has expanded to encompass a broader range of factors. Consumers now also consider animal welfare, environmental impact, and the presence of additional beneficial components in milk when assessing its quality. This shifting consumer demand has led to increased attention on the overall production and sourcing practices of milk. Reflecting on this trend, this review critically explores such novel quality parameters, offering insights into how such practices meet the modern consumer's holistic expectations. The multifaceted aspects of milk quality are examined, revealing the intertwined relationship between milk safety, compositional integrity, and the additional health benefits provided by milk's bioactive properties. By embracing sustainable farming practices, dairy farmers and processors are encouraged not only to fulfill but to anticipate consumer standards for premium milk quality. This comprehensive approach to milk quality underscores the necessity of adapting dairy production to address the evolving nutritional landscape and consumption patterns.
RESUMO
The use of native and malted triticale (MT) flour in dry pasta has been limited despite the potential of triticale in cereal-based food production. In this study, triticale-based dry spaghetti with increasing levels of substitution (0, 25, 50, and 75 g/100 g w/w) of MT flour were formulated and analyzed. Samples were analyzed for technological and nutritional traits, including the in vitro starch and protein digestions. The gradual substitution of native triticale flour with MT increased (p < 0.05) the total dietary fiber content, whereas total starch decreased (p < 0.05). Adding MT flour increased the cooking loss and the stickiness of cooked pasta (p < 0.05). Using MT flour modulated the in vitro starch digestion, lowering the slowly digestible and resistant starch contents. The in vitro protein digestibility was positively affected using MT at the highest substitution level. Overall, MT could be used to formulate dry pasta products being the substitution to native triticale up to 50 g/100 g, a good compromise between nutritional quality and technological characteristics.