After months of speculation and rumors, Apple CEO Steve Jobs admitted that the cause of his recent weight loss is a hormone imbalance. "The remedy for this nutritional problem is relatively simple and straightforward, and I've already begun treatment," he said in an open letter. "But, just like I didn't lose this much weight and body mass in a week or a month, my doctors expect it will take me until late this spring to regain it. I will continue as Apple's CEO during my recovery." Jobs, who has battled pancreatic cancer, will remain as CEO of the company. Jobs has previously battled pancreatic cancer.