Plus, the study relies on people's recall over 10 years to remember their supplement consumption, which may not be accurate, they say.
For men who were smokers, the risk was even higher, quadrupling over next in case of excessive intake of vitamin B12 and increasing three times when excessive doses of B6 was consumed.
Regular taking of vitamins B6 and B12 in high doses were found to be most affecting smokers, who were found to 3-4 times higher risk of getting lung cancer. The second will examine B6/B12 high dose, long-term supplementation in a second large prospective study of men in an effort to determine whether the increases risk observed in the current study can be replicated.
Said Ohio State's Theodore Brasky, PhD: "This sets all of these other influencing factors as equal, so we are left with a less confounded effect of long-term B6 and B12 super-supplementation...."
Researchers from Ohio State University and the National Taiwan University studied more than 77,000 people aged between 50 and 76 in the US and found that men who took high dosages of vitamins B6 and B12 faced 30 percent to 40 percent increased risk of lung cancer. The effect was worse in smokers who exceeded the daily recommended amounts of vitamins, CNN reports.
A new study making the rounds suggests that high intake of B vitamins is associated with an increased risk for lung cancer in men.
Researchers analyzed data from 77,118 participants in the Vitamins and Lifestyle (VITAL) cohort, a long-term prospective observational study created to evaluate the potential associations between cancer risk and use of vitamin or other mineral supplements.
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Two Finnish citizens were killed in the attack, with United Kingdom and Italian citizens reportedly among the injured. A private person had informed local police of the attacker and the police had sent the information to SUPO, Yle said.
Until more research is completed, there is no conclusive link between high doses of vitamin B and lung cancer.
There were too few cases of lung cancer among never-smokers to crunch numbers to see if supplement use was linked to increased risk for them, too. An average healthy body will flush out any excess, unneeded vitamin B, so taking a higher dose probably doesn't provide much benefit.
Max Gomez reported, early studies seemed to show that they might, and they are now some of the most popular supplements sold in drug stores.
All participants were aged between 50 and 76 were recruited in the state of Washington between the years 2000 and 2002. Vitamins B-6 and B-12 may just "hasten or increase the likelihood of lung carcinogenesis among male smokers".
Prior studies created to assess the association between lung cancer risk and B vitamin intake have yielded inconsistent results.
"As far as the magnitude of the association, I think you could characterize our reaction as concerned; especially if you consider how common these supplements are".
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