The biological function of the stereoisomers of a-tocopherol is believed to depend on their bioavailability. Assessment of bioavailability within the body is therefore considered to be a good and easy way to predict biological value. The separation of a-tocopherol methyl ethers by chiral column HPLC is a good and easy tool with which to study the distribution of a-tocopherol stereoisomers. The ...

This investigation was undertaken to decide if tocopherol is actually depleted in the fetus and newborn infant by measuring liver tocopherol level. First, a reliable assay method was established as follows. The colorimetric values obtained by Emmerie-Engel's principle from liver extracts which were eluted through a floridine column were corrected by using the ratios of the tocopherol band area ...

The serum vitamins A, E, and C (antioxidant vitamins) of 112 priest subjects, compared with 90 males and 119 females in a control group, were investigated. Subjects for the study were Thai volunteers who attended the Outpatient Department, Priest Hospital, Bangkok, for a physical check-up from July to September 2003. There was no age difference between the priest group and the controls. All ser...

The ability of dietary supplementation with carotenoids to protect chick tissues against oxidative stress in vitro was examined. Male Leghorn chicks were fed on diets supplemented (100 mg supplement/kg diet) with either beta-carotene, zeaxanthin (beta,beta-carotene-3,3'-diol), canthaxanthin (beta,beta-carotene-4,4'-dione) or alpha-tocopherol, or on a control diet, from 1 d old until 37 d of age...

BACKGROUND There is limited evidence regarding the relationship between serum tocopherol levels and cardiovascular disease. METHODS We conducted a nested case-control study as part of the Japan Collaborative Cohort Study for evaluation of cancer risk (JACC Study). Baseline serum samples were collected from 39 242 participants (age range, 40-79 years) between 1988 and 1990. During the 13-year ...

Serum concentrations of retinol, alpha-tocopherol, beta-carotene and lycopene were measured by reversed-phase high-performance liquid chromatography (r-P HPLC) in 260 randomly selected healthy adult Kuwaitis (159 men and 101 women) aged 18-63 years (mean 33.3 years) to established reference ranges of the micronutrient antioxidants. Total cholesterol concentrations were assayed by an enzymatic m...

Despite convincing in vitro evidence, a vitamin C-E interaction has not been confirmed in vivo. This study was designed to examine the effects of supplementation with either vitamin C or E on their respective plasma concentrations, other antioxidants, lipids and some haemostatic variables. Fasting blood was collected before and after intervention from thirty healthy adults in a double-blinded c...

The present study assessed the influence of type tropical pastures on lamb body weight (BW) gain and meat quality. Fifty-four lambs were allocated to three grazing pastures: (1) AG — Aruana grass (Panicum maximum cv. IZ-5); (2) PP pigeon pea legume (Cajanus cajan Anão); (3) CS contiguous swards, half paddock with PP. After 92 days grazing, slaughtered. Carcasses evaluated longissimus muscle was...