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And, as a side note, height correlates with cancer risk "Its results found that for every extra 10cm (4in) of height, when fully grown, the risk of developing c

• pessimizer 9y ago
  The most convincing explanation for me is that larger people simply have more volume for cancer to start in. If you assume an equal chance for a cancer to start in any cubic centimeter of human body, you'd expect men to be more vulnerable than women to cancer, which is true. You'd also expect height differences to raise the likelihood of cancer with more height and lower it with less, and specifically you'd expect that effect to be stronger (when measured absolutely - "10cm (4in) of height", rather than proportionally to mean volume or mean height) in women, because on average, women are shorter. You'd also expect fat people to get more cancer, and native American Hispanic or East Asian descended populations in the US to get less than the US average. This is what happens. Of course there are a million other factors and all cancers are different, but in the general case you can guess the relative cancer occurrence between populations with a guess at the difference in their mean volumes. This won't keep people from trying to sell you a diet, though. Cancer is terrifying, and the idea that we can control it makes us relax. If you eat very little food, especially in childhood when you need calories to grow, you will get less cancer.