Posted by tealady on November 19, 2004, at 19:17:21
In reply to Re: New Vitamin E findings and the media » Glydin, posted by Larry Hoover on November 17, 2004, at 18:07:16
Br J Nutr. 2004 Sep;92(3):461-8. Related Articles, Links
Antioxidant vitamin status in high exposure to oxidative stress in competitive athletes.Rousseau AS, Hininger I, Palazzetti S, Faure H, Roussel AM, Margaritis I.
Laboratoire Nutrition, Vieillissement et Maladies Cardio-vasculaires, Universite Joseph Fourier, Domaine de la Merci, La Tronche, France.
We conducted a cross-sectional study in 118 well-trained athletes to investigate 'high exposure' to sub-deficient antioxidant status, and consequently to oxidative damage, in relation to estimated daily energy expenditure (EE) and dietary antioxidant intake. Subjects completed 7 d food and activity records. Blood samples were obtained on day 8. Of the athletes 81, 60 and 43% had intakes of vitamins E, C and beta-carotene below two-thirds of the French RDA respectively, which is adjusted for EE (FRDAa). The deficit in vitamin E intake was positively correlated with EE (r 0.51, P<0.0001). All the athletes had normal plasma vitamins E and C and 14% had marginal plasma beta-carotene. Plasma thiobarbituric acid-reactive substances (TBARS) did not increase with increased EE. As evidenced by ANOVA, EE-induced vitamin C intakes increased and consequently led to increased plasma ascorbic acid concentrations. In male athletes, plasma total carotenoids were negatively correlated with plasma TBARS concentrations (r -0.31, P<0.006). The relationship between vitamin C intakes and plasma concentrations was logarithmic (r 0.59, P< 0.0001). To summarize, it is not clear whether vitamin E requirements are overestimated with reference to EE in the FRDAa. Daily requirements for vitamin C do not exceed 200 mg. Our present results could be interpreted as meaning that carotenoids play a protective role as exogenous antioxidants. Carotenoid intakes in athletes must be considered carefully.
Br J Nutr. 2004 Sep;92(3):461-8. Related Articles, Links
Antioxidant vitamin status in high exposure to oxidative stress in competitive athletes.Rousseau AS, Hininger I, Palazzetti S, Faure H, Roussel AM, Margaritis I.
Laboratoire Nutrition, Vieillissement et Maladies Cardio-vasculaires, Universite Joseph Fourier, Domaine de la Merci, La Tronche, France.
We conducted a cross-sectional study in 118 well-trained athletes to investigate 'high exposure' to sub-deficient antioxidant status, and consequently to oxidative damage, in relation to estimated daily energy expenditure (EE) and dietary antioxidant intake. Subjects completed 7 d food and activity records. Blood samples were obtained on day 8. Of the athletes 81, 60 and 43% had intakes of vitamins E, C and beta-carotene below two-thirds of the French RDA respectively, which is adjusted for EE (FRDAa). The deficit in vitamin E intake was positively correlated with EE (r 0.51, P<0.0001). All the athletes had normal plasma vitamins E and C and 14% had marginal plasma beta-carotene. Plasma thiobarbituric acid-reactive substances (TBARS) did not increase with increased EE. As evidenced by ANOVA, EE-induced vitamin C intakes increased and consequently led to increased plasma ascorbic acid concentrations. In male athletes, plasma total carotenoids were negatively correlated with plasma TBARS concentrations (r -0.31, P<0.006). The relationship between vitamin C intakes and plasma concentrations was logarithmic (r 0.59, P< 0.0001). To summarize, it is not clear whether vitamin E requirements are overestimated with reference to EE in the FRDAa. Daily requirements for vitamin C do not exceed 200 mg. Our present results could be interpreted as meaning that carotenoids play a protective role as exogenous antioxidants. Carotenoid intakes in athletes must be considered carefully.
I'm not sure, but it looks like for "normal" people VitE, VitC levels at RDA are adequate..which makes low levels of VitE found in depression stand out even more.
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=15508016&dopt=Abstract
mentioned in http://www.dr-bob.org/babble/alter/20041022/msgs/411145.html
interesting about the caretenoids.??
I know , for me, taking d-alpha tocopherol for about 20 years occasionally helped.. I think I ran into probelms when I started fish oil daily..and took VitE at least very 2nd day to go with the fish oil, and sometimes iron at the same time as I mentioned in this post http://www.dr-bob.org/babble/alter/20041108/msgs/417194.html
Probably that much VitE (500IU for a 50kg weight) depleted my other VitE levels...except for dietary intake
Jan
poster:tealady
thread:417102
URL: http://www.dr-bob.org/babble/alter/20041108/msgs/418049.html