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Vitamin E may increase the life expectancy of males who have high dietary vitamin C intake and smoke less than a pack per day

Date:
January 21, 2011
Source:
Helsingin yliopisto (University of Helsinki)
Summary:
Depending on the level of smoking and dietary vitamin C intake, vitamin E supplementation may extend the life-span of restricted groups of men, according to a new study. Several large randomized trials of humans found that vitamin E supplementation does not reduce mortality. However, depending on the level of smoking and dietary vitamin C intake, vitamin E supplementation may extend the life-span of restricted groups of men.

Depending on the level of smoking and dietary vitamin C intake, vitamin E supplementation may extend the life-span of restricted groups of men, according to a study published in the Age and Ageing.

Several large randomized trials of humans found that vitamin E supplementation does not reduce mortality. However, the average effect on mortality in a group of people with a wide age range may mask an effect of vitamin E on the life-span.

Dr. Harri Hemila, and Professor Jaakko Kaprio, of the University of Helsinki, Finland, studied the age-dependency of vitamin E effect on mortality in the large randomized trial (Alpha-Tocopherol Beta-Carotene Cancer Prevention Study) which was conducted in Finland between 1985-1993. Their study was restricted to follow-up period over 65 years and 10,837 participants contributed to the analysis. Among all analyzed participants, vitamin E had no effect on mortality when participants were 65 to 70 years old, but reduced mortality by 24% when participants were 71 or older.

Among 2,284 men with dietary vitamin C intake above the median who smoked less than a pack of cigarettes per day, vitamin E extended life-span by two years at the upper limit of the follow-up age span. In the other participants, consisting of 80% of the cohort, vitamin E did not affect mortality, which shows that vitamin E is no panacea for extending life expectancy.

The researchers concluded that "if vitamin E influences the life-span, it is possible that a benefit on the oldest participants might be camouflaged by the large middle-aged majority of study participants." Therefore, they propose that it might be useful to analyze the effect of vitamin E supplementation in large controlled trials by the age of the participant at the follow-up and not just by the time after randomization that has been customary.


Story Source:

The above story is based on materials provided by Helsingin yliopisto (University of Helsinki). Note: Materials may be edited for content and length.


Journal Reference:

  1. H. Hemila, J. Kaprio. Vitamin E may affect the life expectancy of men, depending on dietary vitamin C intake and smoking. Age and Ageing, 2011; DOI: 10.1093/ageing/afq178

Cite This Page:

Helsingin yliopisto (University of Helsinki). "Vitamin E may increase the life expectancy of males who have high dietary vitamin C intake and smoke less than a pack per day." ScienceDaily. ScienceDaily, 21 January 2011. <www.sciencedaily.com/releases/2011/01/110120073659.htm>.
Helsingin yliopisto (University of Helsinki). (2011, January 21). Vitamin E may increase the life expectancy of males who have high dietary vitamin C intake and smoke less than a pack per day. ScienceDaily. Retrieved July 24, 2014 from www.sciencedaily.com/releases/2011/01/110120073659.htm
Helsingin yliopisto (University of Helsinki). "Vitamin E may increase the life expectancy of males who have high dietary vitamin C intake and smoke less than a pack per day." ScienceDaily. www.sciencedaily.com/releases/2011/01/110120073659.htm (accessed July 24, 2014).

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