Recent study on insulin resistance and depression?

Q: In your book, Lifting Depression: The Chromium Connection, you suggest that resistance of the body to the action of insulin is associated with depression. You cite your own case studies as well as studies conducted in the 1980s on which your theory is based. Is there any recent clinical evidence to support your theory?

A: Yes. A group of investigators in Finland, led by Professor Markku Timonen, measured insulin resistance and depression in 491 men who were 55 years old. In their article, published in 2004, they report that subjects with insulin resistance had higher depression scores than people who did not have insulin resistance.