Phytic acid and calcium affect the in vitro rate of navy bean starch digestion and blood glucose response in humans

Thompson, Lilian U.; Button, C; Jenkins, D. J. A.

doi:10.1093/ajcn/46.3.467

Cited by 125 publications

(72 citation statements)

References 27 publications

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“…The presence of phytic acid in the diet delays postprandial glucose absorption (Pallauf and Rimbach 1997). Reducing phytic acid concentration in the diet increases carbohydrate absorption and blood glucose level in humans (Thompson et al 1987) and the in vitro starch digestibility of pearl millet (Khetarpaul and Chauhan 1991). Adding microbial phytase to the diet has been shown to increase energy retention (Ketaren et al 1993b), apparent total tract energy digestibility (Murry et al 1997) and crude fat digestibility (Helander et al 1996).…”

Section: Feed and Energy Intakementioning

confidence: 99%

The effect of microbial phytase and feed restriction on protein, fat and ash deposition in growing-finishing pigs

Gagné¹,

Matte²,

Barnett³

et al. 2002

Can. J. Anim. Sci.

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. 2002. The effect of microbial phytase and feed restriction on protein, fat and ash deposition in growing-finishing pigs. Can. J. Anim. Sci. 82: 551-558. Forty-eight 35-kg-bodyweight barrows were assigned to treatments in a 2 × 2 factorial arrangement. Main factors were feed intake level (ad libitum or restricted) and supplementation of microbial phytase (with or without). Restricted pigs received 80% of the feed consumed by the corresponding ad libitum group. Phytase-supplemented diets contained 584 phytase units kg -1 . Body weight, fat, protein and ash were estimated every 2 wk by dual-energy X-ray absorptiometry. Plasma α-amino N concentrations were measured every 30 min during the 6 first postprandial hours at 90 and 132 d of age. Microbial phytase addition reduced feed intake by 6.8% (P < 0.05). Phytase did not affect (P > 0.05) feed, energy and protein efficiencies, but it reduced protein deposition (P < 0.05) and tended to reduce ADG (P < 0.09). Ninetyday-old pigs receiving phytase had higher plasma levels of α-amino N during the first postprandial hours (P < 0.01) as compared to control pigs. At 132 d of age these effects disappeared. Supplemental phytase may improve α-amino acid absorption in growing pigs but the phytase effect on protein deposition suggest that these effect is not necessarily associated with better growth performance when nutrient requirements are satisfied.Key words: Pigs, phytase, feed intake, amino acids, protein deposition Gagné, F., Matte, J. J., Barnett, G. et Pomar, C. 2002. The effect of microbial phytase and feed restriction on protein, fat and ash deposition in growing-finishing pigs. Can. J. Anim. Sci. 82: 551-558. Quarante-huit porcs mâles castrés de 35 kg de poids vif ont été aléatoirement répartis selon un dispositif en factoriel 2 × 2 dont les facteurs principaux étaient la prise alimentaire (à volonté ou restreinte) et l'addition de phytase microbienne dans la ration (avec ou sans phytase). Les porcs restreints ont reçu 80 % de la ration consommée par les porcs nourris à volonté correspondante. Les rations avec phytase présentaient une activité phytasique de 584 unités kg -1 . Le poids vif, le gras, la protéine et les cendres corporels ont été évalués tous les 15 jours par absorptiometrie aux rayons X. À 90 et 132 jours d'âge, les concentrations plasmatiques d'azote α-aminé a été mesuré chaque 30 min pendant les 6 heures après le repas. L'ajout de phytase dans la ration a réduit la prise alimentaire de 6.8% (P < 0.05) mais il n'a pas affecté (P > 0.05) la conversion alimentaire de la ration ni celui de l'énergie ou de la protéine. Par contre, il a diminué le dépôt journalier de protéine (P < 0.05) et tendait à diminuer celui du gras (P < 0.09). À 90 jours d'âge, les porcs avec phytase ont présen-té une plus forte concentration d'azote α-aminé dans les premières heures postprandiales (P < 0.01) que les porcs contrôles. Cependant, cet effet a disparu à 132 jours d'âge. L'ajout de phytase dans la ration peut améliorer l'absorption de l'azote α-aminé chez le porc en crois...

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Section: Feed and Energy Intakementioning

confidence: 99%

The effect of microbial phytase and feed restriction on protein, fat and ash deposition in growing-finishing pigs

Gagné¹,

Matte²,

Barnett³

et al. 2002

Can. J. Anim. Sci.

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“…Then the samples were dialyzed against 800 mL of distilled water at 37 °C for 3 hrs (n = 4). For 3 hours, 1 ml dialysate samples were taken out at hourly intervals and analyzed for total sugars by 3,5-dinitrosalicylic acid method (Thompson et al, 1987). In vitro starch digestion rate (IVSDR) was calculated using white bread as the reference sample, as follows;…”

Section: Iz (Mm) = Iz Dia (Mm) -Cork Borer Dia (Mm)mentioning

confidence: 99%

Antioxidant and antimicrobial activities and starch digestion rate of the organically- and non-organically grown traditional rice varieties in Sri Lanka

et al. 2017

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Abstract:The study was designed to assess the total phenolic content (TPC), free radical scavenging activity, antimicrobial property and in vitro starch digestion rate of three traditional rice varieties grown organically and non-organically in Sri Lanka. The 70% ethanol extractions of rice were subjected to TPC, DPPH -free radical scavenging assays to determine antioxidant activity, and antimicrobial susceptible test against three bacteria, namely, Escherichia coli, Salmonella typhi and Staphylococcus aureus to determine antimicrobial properties. Starch digestion of cooked rice samples were evaluated under in vitro conditions. Both TPC and free radical scavenging activity was significantly higher (P<0.05) in organically produced traditional rice while the non-organically produced traditional rice samples showed a significantly higher (P<0.05) antimicrobial activity against S. typhi and S. aureus. There was no significant difference (P>0.05) in the in vitro starch digestion rate between the two groups. Though the study only considered traditional rice varieties, the results suggested that organically produced traditional rice samples performed better than those non-organically produced, with regard to the antioxidant properties such as TPC and free radical scavenging activity. The Madathawalu cultivar performed superior role in total phenolic content, free radical scavenging activity and Glycemic Index compared to that of two other traditional rice varieties, namely, Suwandel and Handiran.

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“…The opposite effect was also demonstrated: a sharper increase in glycemia after consuming food from which phytic acid had previously been removed (Thompson et al, 1987).…”

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confidence: 99%

“…A consequence of the inhibitory effect of phytic acid on digestion of starch in the digestive tract is the lower increase in glycemia during the period of absorption (Yoon et al, 1983;Thompson et al, 1987 After adding phytic acid to food, a distinct negative correlation between its content in the diet and postprandial increases in blood glucose levels was noted.…”

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confidence: 99%

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Phytic acid - its influence on organism

Szkudelski¹

1997

J. Anim. Feed Sci.

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Phytic acid is found in the grains and seeds of many plants. Its presence in the diet may restrict the absorption of many major and trace elements from the digestive tract. The interactions of this compound with intestinal digesta compounds can reduce protein and starch digestibility. This leads to reduced nitrogen retention and causes a milder rise in glycemia during absorptive phase. Phytic acid also has antineoplastic properties, can prevent renal stone formation and some heart diseases. This compound is synthesized in mammalian tissues and its ability to bind specifically with some cellular proteins has been demonstrated.In this paper an outline of the most important metabolic effects of phytic acid is presented. It is also attempted to explain some of the mechanisms of its action based on data from the literature. KEY WORDS: phytic acid, metabolismPhytic acid (inositol hexaphosphosphoric acid) is found in many vegetable products used in the nutrition of animals and consumed by humans. The grain and seeds of certain plants, and their products such as wheat bran, are particularly rich in this compound. The phytic acid content in grain and seeds differs considerably, and can reach a maximum of about 2% dry weight (Reddy, 1992).The interference of phytic acid in metabolic processes begins even in the digestive tract, when it reacts with components of the intestinal contents.The most frequently observed consequence of the presence of phytic acid is inhibition of the absorption of many major and trace elements from the digestive

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Phytic acid and calcium affect the in vitro rate of navy bean starch digestion and blood glucose response in humans

Cited by 125 publications

References 27 publications

The effect of microbial phytase and feed restriction on protein, fat and ash deposition in growing-finishing pigs

The effect of microbial phytase and feed restriction on protein, fat and ash deposition in growing-finishing pigs

Antioxidant and antimicrobial activities and starch digestion rate of the organically- and non-organically grown traditional rice varieties in Sri Lanka

Phytic acid - its influence on organism

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