November 03, 2009

Study: Depression's Link To Processed Food

This may strike some readers as "Duh," but British and French researchers report in this month's British Journal of Psychiatry that a long-term study of diets and depression in some 3,500 Brits found more depression in those who ate a diet high in processed foods. Those who ate a diet stronger in "whole" foods--fruits, veggies, fish--saw a 26 percent less chance of depression than did those who ate the most processed foods (meats, cheeses, desserts) and fried foods. Conversely, the high-processed foods group had a 58 percent higher risk of depression than did the whole foods group. (A BBC account of the study is here.)

Coming on the heels of last month's study showing depression-protecting effects of the Mediterranean diet, this study is further evidence of the well-known link between food and mood. Of course, it's not going to be real easy for people in the UK to follow a Mediterranean diet nor in most of the US, so this study is quite real world in that sense. It's also a big argument in favor of moderation: there's a great middle group in this study who had little depression yet did eat some of the whole foods and some of the processed foods. That said, I'm sure some would love to make an ideological argument about corporations and processed foods and a conspiracy of depression-for-profit, when really what you eat boils down to individuals eating what they already know is good for them. If they don't buy Cheez Whiz and the like (or buy much less of it), then companies won't bother making it.

The study also confirms what I've long said on this site: if you don't eat reasonably well and reasonably often, then you aren't even giving yourself a fighting chance with depression. I feel the same way about exercise and socialization. Neither are cures per se, but without them, you can go down a rat hole of mood.

One weakness of the study (I haven't seen the full version) and the reportage on it is that I cannot tell how depressed people were at baseline and at the study's conclusion. My hunch is that the findings are probably most applicable to mild-to-moderate depression and that diet would have less of an effect, especially short-term, in severe, chronic depression.

At least that's the opinion of this light-on-processed-foods, heavier-on-fruits-than-veggies eater.

Posted by Philip Dawdy at November 3, 2009 12:05 AM
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Comments

",,,well-known link between food and mood.,,,"

Mood, that is the question.
I don't think it has anything to do with depression.

Posted by: Ana at November 2, 2009 11:57 PM

Couldn't it also be that people who are already depressed are less likely to feel like preparing food from scratch? Easier to get takeout or warm up a frozen dinner when you're feeling low...

Posted by: Jeremy at November 3, 2009 08:31 AM

I the renowned fraud and well paid researcher Dr. Thadious Thunkinstien have done my own through science based study not directly funded by the Pharmaceutical Industry, Comedy PsychCentral, or the NIH.

I have found and concluded unequivocally in this triple blind unsound study covering myself and motivated volunteers. Beer and Pizza; followed by some rich dark chocolate and a damn good cigar are completely psych neutral in 98% of participants. (the other 2% passed out early on in the study, or had preexisting conditions that prevented the validity of their participation to be significant in final statistical outcomes)

Further analysis of critical data and criteria shows no leading indicators or irritants within generically biochemical markers related to all pathogenic psychological disease of the prostrate or other related organs including the brain.

I hope this comes as welcome and possibly even remarkable news at this present juncture within the realms of modern psychological research.

**Side Note** upon release of this ground breaking study; pizza, beer, and chocolate manufacturing stocks across the board rose to new 3 years highs on Wall Street. In further news: negotiations with Cuba on a new free trade agreement has been rumored to be warming up like a freshly lit cigar. Critic's in Washington DC debunked this rumor as a lot of smoke and mirrors.

Posted by: Dr.Thunkinstien at November 3, 2009 09:06 AM

Dr. Thadious Thunkinstien has undisclosed ties to GSK, AstraZeneca,AnhauserBusch,Pyramid Ale,Samual Adams and Pizza Hut.

Senator Grassley needs to investigate Thunkinstien and his cohort who shall remain nameless, though rumor has it that he has been hired in Florida at an unknown, but soon to be corrupt University within swimming distance of Cuba.

Posted by: anonymous at November 3, 2009 12:30 PM

makes me wonder how this study could have possibly controlled for all the other factors that influence one's mood and/or one's diet.

Posted by: jenna at November 3, 2009 02:59 PM

This is something that shrinks who work in psych hospitals just can't seem to understand - when you put someone who is depressed in an environment where they're given high fat, high carb meals, little to no fresh air or sunshine, make them sit in a circle all day, and talk to them like their idiots it just reinforces depression. It's never made sense to me that this kind of environment would improve mood.

Imagine what it would be like if they actually encouraged healthy behaviors - healthy diet, fresh air and sunshine, opportunities to actually move around, and treating adults like adults. What a concept!

Posted by: Lisa at November 3, 2009 09:36 PM

I'm glad to see in the BBC article that they tried to confirm the direction of causality, of diet leading to depression, not just a correlation between the two. But I also think depression contributes to worse eating habits for many people.

Posted by: Phil at November 3, 2009 10:16 PM

I mean "they're" not their.

Posted by: Lisa at November 4, 2009 05:10 AM

I'm embarrassed to say how many years it took me to figure out that I feel MUCH better when I eat properly (i.e. nothing from a box). No, it doesn't cure my depression. But I just feel better and am able to cope with life much more easily.

It's difficult, however, in the US to eat well. It's really swimming against the tide. The advertising, the hidden fats, sugars, chemicals mean I have to stay on my toes and go out of my way to do something that should be natural and easy.

I always seem to do best in nearly third-world countries where the pace of life is slow and the food always seasonal and local.

Posted by: Sherry at November 4, 2009 06:55 AM

Processed foods are often loaded with fat, grease, and oil. If you've been living on Mars, you probably do not understand why these things could tip your weight towards the danger zone. Since this is very unlikely, it is completely understandable why you cannot afford to ingest too many fats during meals. Processed meals are convenient--conveniently overloaded with fats.

Posted by: processed-food at November 12, 2009 07:50 AM
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