Fifty years ago, the US Surgeon General first warned of the dangerous effects of smoking. On the anniversary of that announcement, the current Surgeon General has released new data.

Call it a gut reaction. A popular diabetes medication works by helping gastrointestinal hormones that encourage insulin production. The same medication may also help ward off autoimmune diseases.

Steroids used to treat rheumatoid arthritis have been linked to the development of diabetes. Now, scientists may have pinpointed a steroid dose that treats arthritis without increasing the risk of diabetes.