Serum levels of retinol and other antioxidants for hearing impairment among Japanese older adults.

Background: The objective of this study was to assess the relation between serum levels of retinol and other antioxidants and hearing impairment in Japanese older adults.

Methods: This is a community-based cross-sectional study comprising 762 residents aged 65 years or older in Kurabuchi, Gumma, Japan. We measured serum retinol and other antioxidants (alpha- and gamma-tocopherols, and carotenoids including beta-cryptoxanthin, alpha- and beta-carotenes, lycopene, and lutein plus zeaxanthin) by high-performance liquid chromatography and divided each measurement into quartiles.

Serum antioxidants and age-related macular degeneration among older Japanese.

From the perspective of human nutrition, the prevention of age-related macular degeneration (AMD) through diet control is feasible and desirable. We investigated the relationship between serum antioxidants and AMD in the community-dwelling older Japanese eating a typical Japanese diet. In this study, 722 subjects aged 65 years or older (297 males and 425 females) who had gradable fundus photographs were included.

Urinary excretion of an oxidative stress marker, 8-hydroxyguanine (8-OH-Gua), among nickel-cadmium battery workers.

The relationship between oxidative stress and carcinogenic metals including nickel and cadmium is a matter of interest. To assess the oxidative stress status of workers exposed to nickel and cadmium simultaneously, we determined urinary excretion of 8-hydroxyguanine (8-OH-Gua), a urinary oxidative stress marker. Our subjects were 66 (64 males and 2 females) nickel-cadmium battery workers.

Uptake of cadmium in meals from the digestive tract of young non-smoking Japanese female volunteers.

Objectives: To estimate rates of cadmium (Cd) uptake from the digestive tract and changes in Cd in biological specimens after intake of Cd mainly in rice.

Methods: Twenty-five young non-smoking Japanese female volunteers (20-23 in age) were recruited and a 20-d experimental study was conducted. With polished rice containing 0.