Soda and Depression

Last week I researched a bit about the link between soda and depression. Of course, as with all bad things that we love, it is linked to depression.

A few points:

- I drink a lot of Pepsi. If I don't consume soda for a few days..or even a day, I get edgy, irritable (not so different from how I usually feel), and I get headaches and just generally blah all-around.

- As soon as I take that glorious first sip of Pepsi, things are good again.

- An article I read said that:

One small cohort trial found that when people eliminated sugar and caffeine from their diet those with unexplained depression experienced improved moods within a week. When caffeine and sugar were reintroduced into their diet, their symptoms returned; but, placebo did not produce the same effect. Giving further credence to the caffeine-depression link, another study found that regular consumption of high levels of caffeine (>750 mg daily) appears to be associated with depression.

I never noticed improved moods when I went a week without any soda/caffeine, it was the complete opposite. Or maybe I'm just imagining it that way or perhaps it's because I have depression any way you look at it, with or without caffeine/sugar.

I'd love to read more on the subject but I'm having a hard time finding concrete facts on it. Any links/info would be appreciated.