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Study participants were recruited and screened from the local community through advertisements or from a database of participants that had previously volunteered for similar research studies. Isolation and characterisation of an equol-producing mixed microbial culture from a human faecal sample and its activity under gastrointestinal conditions. This rapid absorption is consistent with the behavior of the isoflavone aglycons daidzein and genistein, which are also rapidly absorbed after ingestion 45 , Prior use of antibiotics in the preceding 3 mo was an exclusion criterion. Treatment with antibiotics reduces plasma equol concentration in cynomolgus monkeys Macaca fascicularis. Hematological tests included a complete blood count. Isolation and identification of equol-producing bacterial strains from cultures of pig faeces.

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More recently, it has been proposed that the efficacy of soy foods may be enhanced by metabolism of daidzin to equol, the equol hypothesis, and that because some individuals do not produce equol 312this may explain some of the variability in the outcome measures among dietary intervention studies of soy 6. Comparing the pharmacokinetics of daidzein and genistein with the use of 13 C-labeled tracers in premenopausal women. There was no difference in the calculated pharmacokinetics between the equol-producers and nonproducers Fig.

The availability of an equol-rich supplement now offers the possibility of investigating more directly the potential benefits of S – – equol 6particularly in those adults unable to synthesize S – – equol when consuming soy foods.

Receive exclusive offers and updates from Oxford Academic. All bioanalytical analyses were performed without knowledge of the treatment groups by the investigators. As part of an ongoing development program, we report the results from a study aimed at determining the pharmacokinetics of natural S – – equol following its administration as the SE5-OH equol-containing supplement in healthy postmenopausal women. In a single-center, open-label, randomized, 2-period crossover design study, the pharmacokinetics of S – – equol administered as single-bolus oral doses of 10 and 30 mg in the form of SE5-OH tablets was determined in 12 healthy postmenopausal women.


Pharmacokinetics and metabolism of pemafibrate, a novel selective peroxisome proliferator-activated receptor-alpha modulator, in rats and monkeys. All 12 women enrolled successfully completed the study.

Clinical characteristics and pharmacokinetics of purified soy isoflavones: Phenotypic typing, technological properties and safety aspects bf-000 Lactococcus garvieae strains from dairy environments.

In part, this is accounted for by earlier t max values for S – – equol given in the form of the SE5-OH supplement compared with purified equol formulations. Premenopausal equol excretors show plasma hormone profiles associated with lowered risk of breast cancer.

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Liquid chromatography-tandem mass spectrometry assay for simultaneous measurement of estradiol and estrone in human plasma. Sign In or Create an Account. This value represents the aggregate elimination rate of unconjugated and conjugated S – – equol. Isolation of an isoflavone-metabolizing, Clostridium-like bacterium, strain TM, from human faeces.

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All participants were instructed to abstain from consuming soy- flax- or lignan-containing foods and beverages for 7 d prior to dosing and to abstain from xanthine-containing foods and beverages, grapefruit and grapefruit juice, and alcohol for 3 d prior to and during the study.

Furthermore, when humans and most animal species consume soy isoflavones in the form of soy foods, or as the pure daidzein, it is the S – – equol diastereoisomer that appears in plasma and is excreted in urine 7.

For clarity, data are shown only for 0—12h time points. Identification of bf-0200 specific intestinal bacterai capable of metabolising soy isoflavone to equol. Evidence for lack of absorption of soy isoflavone glycosides in humans, supporting the crucial role of intestinal metabolism for bioavailability. Usual dietary consumption pl2037 soy foods and its correlation with the excretion rate of isoflavonoids in overnight urine samples among Chinese women in Shanghai.

Differences in dissolution and solubility of S – – equol from these different formulations, or the meal effect, probably account for the differences in t max values and therefore the C max values, because for a given dose, slower absorption would lead to lower peak plasma concentrations. This is evidenced by the fact that infants who are born with a sterile gut do not begin to produce equol before the age of 4—6 mo even when fed soy infant formula from birth 16 — 18 and germ-free animals fed commercial rodent diets that typically contain soy protein 19 also do not produce equol Equol, a new inactive phenol isolated from the ketohydroxyoestrin fraction of mare’s urine.


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The supplement formulated in mg tablets contained 5 mg of S – – equol. However, equol can now be chemically synthesized 93839 or made by specific equol-producing intestinal bacteria 22 — S – – equol was measured in plasma and urine collected at timed intervals over a h period postdosing using tandem MS. The terminal-phase elimination rate constant was estimated by log-linear regression using at least 3 time points with measurable plasma concentrations.

Plasma and urinary kinetics of the isoflavones daidzein and genistein after a single soy meal in humans. The mixed-effects linear model for each parameter included terms for sequence, period, and treatment as fixed effects, and a term for participants within sequence as a random effect.

The clinical arm of the study was conducted at Community Research Cincinnati, OH on an in-patient basis and according to a protocol that was reviewed and approved by the internal Institutional Review Board. Plasma S – – equol pharmacokinetics in healthy postmenopausal women administered and mg doses of S – – equol in the form of SE5-OH tablets in a single bolus 1.