According to a study in the British Journal of Cancer, men whose index finger was longer than their ring finger were much less likely to develop prostate cancer. Researchers looked at the hands of 1,500 prostate cancer patients, comparing them to 3,000 healthy men. The length of fingers is believed to relate to sex hormone levels in the womb: being exposed to less testosterone before birth makes a longer index finger, which could protect against prostate cancer later on. More studies are needed, but this could one day be used as a simple test for prostate cancer risk.
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