Apple chief Steve Jobs says a hormone imbalance caused his weight loss. "I’ve decided to share something very personal with the Apple community so that we can all relax and enjoy the [Macworld] show tomorrow," he writes in a letter posted on Apple's Web site.

Fortunately, after further testing, my doctors think they have found the cause—a hormone imbalance that has been “robbing” me of the proteins my body needs to be healthy. Sophisticated blood tests have confirmed this diagnosis.

The remedy for this nutritional problem is relatively simple and straightforward, and I’ve already begun treatment.

Details please. Owners of this $80 billion (market cap), publicly traded company deserve to know.