Dr. Oz: I'm going to give you three tips you can do today, practically as you watch the show. The first is: the ratio of your index finger to your ring finger. Most of the time, men will have a longer ring finger than index finger. Women generally won't. They're about even or actually the opposite with the index finger being longer. If you have a longer ring finger, you have a higher incidence of osteoarthritis. In fact, it's twice the incidence of osteoarthritis.

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However, if you've got a ring finger that's longer, you have higher testosterone levels and it gets longer because you saw testosterone in your mother's womb, so you'll often have higher sperm counts. So, it's good and a little bit of bad, but it's something you can learn about your body.

The second big thing is your bra size. If your bra size at age 20 is a size D, then guess what? You've got a 1-1/2 times higher rate of developing diabetes—a fifty percent increase of chance of diabetes.

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And the third tip I'll throw out there is your earlobe. If there's a vertical crease in the earlobe coming down, that vertical crease is because the blood flow to that lobe isn't where it needs to be. And because of that it'll crack. That little vertical crack (that line in your earlobe) is an indicator that you are at more risk for heart disease.

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So those are three tips, easy physical exam traits, that we as physicians use.

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