In the past, I've written quite a bit about testosterone replacement therapy (TRT). In June, I wrote about the position the American Association of Clinical Endocrinologists was taking on TRT: "The benefits to treat low testosterone in both men and women substantially outweigh any risks." I agree with their position, so much so that I take testosterone myself, and I regularly prescribe it to my patients, who have seen great results. So I was happy — but not surprised — to hear about a large new study confirming the benefits of TRT for men with low levels.

COPD (chronic pulmonary obstructive disease) is becoming increasingly common. By 2030 scientists are predicting that COPD will be the third leading cause of death in the country. If you have COPD, you're looking for two things. One, how to breathe better. And two, how to feel and function better. Recently, researchers looked into an ancient treatment for COPD that is natural and safe. They wanted to know if the treatment was really effective.

I've said for years that the best way to avoid weight gain and diabetes is to stay away from white foods, such as white flour, sugar, white rice, and even potatoes. It's generally good advice, but if the thought of giving up some favorite foods is hard, I have good news. You can have your potatoes and eat them too — if you eat the purple ones!