EurekaMag.com logo
+ Site Statistics
References:
53,869,633
Abstracts:
29,686,251
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on LinkedInFollow on LinkedIn

+ Translate

Differences in vitamin B6 status indicator responses between young and middle-aged women fed constant diets with two levels of vitamin B6



Differences in vitamin B6 status indicator responses between young and middle-aged women fed constant diets with two levels of vitamin B6



American Journal of Clinical Nutrition 42(2): 226-234



The responses of adult women to two levels of vitamin B6, was conducted with five young and eight middle-aged subjects. A constant diet (2.3-2.4 mg vitamin B6 per day) was fed for four weeks followed by three weeks of the same diet supplemented with 8.0 mg pyridoxine. Plasma pyridoxal 5'-phosphate (PLP), plasma and urinary vitamin B6, and urinary 4-pyridoxic acid (4-PA) were determined. The older women had significantly lower plasma PLP, plasma and urinary vitamin B6 and slightly higher urinary 4-PA values on normal vitamin B6 intakes. With supplementation, only the difference in urinary total vitamin B6 remained significant. Tryptophan load tests revealed no significant between-group differences in xanthurenic acid or kynurenic acid excretion. These results demonstrate an age-related difference in vitamin B6 status indicators in women under controlled dietary intake of vitamin B6.

(PDF emailed within 0-6 h: $19.90)

Accession: 001336108

Download citation: RISBibTeXText

PMID: 4025194

DOI: 10.1093/ajcn/42.2.226



Related references

Differences in vitamin b 6 status indicator responses between young and middle aged women fed constant diets with 2 levels of vitamin b 6. American Journal of Clinical Nutrition 42(2): 226-234, 1985

Dietary and plasma levels of carotenoids, vitamin E, and vitamin C in a group of young and middle-aged nonsupplemented women and men. Nutrition Research 20(11): 1537-1546, 2000

Vitamin B1 nutritional status assessed by blood vitamin B1 value of middle aged Japanese men and women. Vitamins (Kyoto) 76(7): 349-353, July, 2002

Vitamin B-6 status of women with a constant intake of vitamin B-6 changes with three levels of dietary protein. Journal of Nutrition 126(7): 1891-1901, 1996

Vitamin b 6 status of women with constant protein intake and four levels of vitamin b 6. FASEB Journal 5(4): A556, 1991

Changes in vitamin B-6 status indicators of women fed a constant protein diet with varying levels of vitamin B-6. American Journal of Clinical Nutrition 66(6): 1379-1387, 1997

Low vitamin D status is associated with physical inactivity, obesity and low vitamin D intake in a large US sample of healthy middle-aged men and women. Journal of Steroid Biochemistry and Molecular Biology 121(1-2): 462-466, 2010

Urinary and plasma vitamin levels, vitamin saturation and clinicometabolic comparison in normal young, middle aged and elderly subjects. Acta Vitaminologica 10(6): 245-254, 1956

Vitamin levels in urine and plasma, vitamin saturation and clinical and metabolic relations in normal young, middle-aged and elderly subjects. Acta vitaminol, 10: 245-254, 1956

Effect of vitamin E supplementation on antioxidant defense systems and humoral immune responses in young, middle-aged and elderly Korean women. Journal of Nutritional Science and Vitaminology 49(2): 94-99, 2003

Vitamin B-6 requirement and status assessment of young women fed a high-protein diet with various levels of vitamin B-6. American Journal of Clinical Nutrition 67(2): 208-220, 1998

Plasma homocysteine concentrations correlate with vitamin B-6 status indicators in young women consuming four levels of vitamin B-6. FASEB Journal 12(4): A511, March 17, 1998

Assessment of vitamin B-6 status in young women consuming a controlled diet containing four levels of vitamin B-6 provides an estimated average requirement and recommended dietary allowance. Journal of Nutrition 131(6): 1777-1786, 2001

B 6 vitamer concentrations of young women adolescent girls and obese middle aged women having adequate vitamin b 6. FASEB Journal 4(3): A365, 1990

Vitamin K in the aged, with special reference to the clinical significance of the urinary gamma-carboxy glutamic acid content as a new indicator for the vitamin K status. Nihon Ronen Igakkai Zasshi. Japanese Journal of Geriatrics 20(2): 128-132, 1983