There are several ways of giving radiation dosage to a cancerous tumor. The most common method is to deliver the required dosage from an external beam of radiation produced outside the body. In this case the source of radiation beam is located 80-100 cm from the body of the person receiving radiation. Sometimes placing the source of radiatio... Read more
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Many of us take vitamin and mineral supplements on a regular basic and this is particularly true as we start to get a bit older. However, in the case of men, and particularly those men who have a family history of prostate cancer, it has now been shown that they could be doing themselves more harm than good. In a five year study carried out recently by the National Cancer Institute and involving nearly 300,000 men it was found that men who were regularly taking more than the recommended daily dose of one multi-vitamin tablet a day increased their risk from advanced prostate cancer by about thirty percent. In addition, the risk of death from advanced prostate cancer for those in the study was doubled. The study also noted that there was a significantly increased risk in a sub-group of men who also had a family history of prostate cancer or who also took selenium, beta-carotene and zinc supplements. One very important finding of this study was that there was no apparent increase in the overall rate of prostate cancer within the study group and this means that there is no suggestion that the excessive use of vitamins actually causes prostate cancer. However, in the case of those members of the study group who were taking multi-vitamins in excessive quantities the risk of their developing advanced prostate cancer was increased by nearly one-third and their risk of dying from advanced prostate cancer was doubled. Vitamin and mineral supplements have been shown over many hundreds of years to have considerable health benefits and today a multi-million dollar industry has been established to meet our growing demand from an ever widening range of supplements. Indeed several supplements, such as green tea extract (EGCG), have been developed in recent years specifically for men who are suffering from prostate problems. So does this study mean that we should stop taking supplements? Not at all. First, the study clearly shows that the problem only arises in those men who exceed the normal recommended daily dose of multi-vitamins and there is no evidence at all to suggest any risk as long as you keep your intake within recommended daily levels. Second, because the study looked only at multi-vitamins, it is not possible at this point to say just which component (or components) causes the problem. At this point further study will clearly be necessary if we are to isolate the true root of the problem. On balance, if you feel that you need to supplement your diet with vitamins, then the benefits will almost certainly outweigh any risks. Just be careful and take no more than you need and which your doctor recommends.
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