It is kind of hard to know what to make of this research. The information provided by the Guardian is limited at best. I think the major take away is that supplements are exactly that, supplements. There is no substitute for a healthy diet and lifestyle. For me personally, I would need to know what type of supplements the individuals were taking, natural or synthetic and who were the target participants in the study. Any research done on individuals who take supplements and ignore their health is doomed for failure or success depending on the desires of the researcher.
Taking more than the recommended dosage beta carotene a supplement advertised as a boost to the immune system was found to increase the risk of developing lung cancer and heart disease by up to 20%, according to the university. The review also noted that a trial involving a folic acid supplement, which is thought to reduce precancerous polyps in the colon, actually increased the number of polyps among users compared with those who received a placebo. Prof Tim Byers, associate director for cancer prevention at the universitys cancer centre, said: We have discovered that taking extra vitamins and minerals do more harm than good.