For The Love of Food

Welcome to Friday’s For The Love of Food, Summer Tomato’s weekly link roundup.

There are a ton of interesting articles and news stories out this week, and unfortunately I did not have room here to include a favorite recipe. See below for instructions on how to find a comprehensive list of my reading recommendations.

There are some heavy topics here, but all are worthy of your full attention. For balance, I posted several contradictory articles to make it clear that these issues are not simple and clear cut. Anyone who claims otherwise is not thinking hard enough.

If you would like to see more of my favorite articles each week or just don’t want to wait until Friday, be sure to follow me on Twitter (@summertomato) or the Summer Tomato Facebook fan page. For complete reading lists join me on the social bookmarking sites StumbleUpon and Delicious, and share with me your favorites as well.

Submissions of your own best food and health articles are also welcome, just drop me an email using the contact form. I am currently accepting guest posts at Summer Tomato for any healthy eating and exercise tips.

For The Love of Food

• You. Need. Fat. <<I love Michelle’s (@MPfennighaus) perspective on dietary fat in this article. Just this week I’ve fielded a ton of questions and confusion about fat. I love oils, and so should you. (The Daily Balance)
• Eating Animal Fat May Lead to Pancreatic Cancer <<Just in case you were thinking about going crazy Atkins-style after that last article, remember that not all the news is good about certain kinds of fat. This study just shows an association (not causation) of animal fat and pancreatic cancer, but moderation is usually a good idea. (HealthDay)
• Horizon organics alert: here comes “natural” <<B.S. of the week Seems like Dean Foods is bent on ruining all the biggest organic products. First Silk Soy Milk, now Horizon. Apparently they want to charge you organic prices for foods that aren’t certified organic (aka conventional). Don’t fall for it. (via @marionnestle at Food Politics)
• This just in: Vegetarian diets are fine <<Looks like the American Dietetics Association has finally issued a bill of approval on vegetarian diets. Not sure what took them so long. Personally I don’t have much of an opinion on the vegetarian thing. Sure it can* be healthier than a typical Western diet (*see next 2 articles), but if health is your concern you have more options as an omnivore. No matter what food religion you subscribe to, vegetables are the cornerstone of any healthy diet. (Los Angeles Times)
• How High Carbohydrate Foods Can Raise Risk For Heart Problems <<Yes, refined carbohydrates are the real culprit in heart disease, not fat. (ScienceDaily)
• Metabolic Syndrome May Make Breast Cancer More Likely <<Metabolic syndrome, also caused by carbohydrates, increases risk for breast cancer. (HealthDay)
• Dear Mark: Freezer Essentials <<Those of you living in states that aren’t California may want to start stocking your freezer now, before your farmers markets close up for the winter. Mark Sisson offers some tips on how to make that dream a reality. (Mark’s Daily Apple)
• Don’t be Fooled by Healthy Food Imposters <<I pick on Diets In Review a lot for being completely full of crap, but I like to give credit where credit is due. Finally some good advice about fake health food from an otherwise irresponsible publication. (Diets In Review)
• It’s Time to Learn From Frogs <<One of the most important articles I’ve read in weeks. This is a fantastic piece in the New York Times about why we should stop being naive about the impact of environmental toxins (especially endocrine disruptors) on our lives.
• Soy isn’t affecting men’s hormone levels…but something is <<Another important piece on the impact of hormones on human development. Looks like soy isn’t the problem some people (not me) thought it was. (Nutrition Data)

What great articles did you read or write this week? Leave your links in the comments.

Go Nuts!

Have you ever noticed that some of your strongest food memories are of rich, fat laden meals shared with family and friends? According to new research, this may not be a coincidence. A study published last week in the Proceedings of the National Academy of Sciences demonstrates that digesting fatty foods enhances memory consolidation using the same neural pathway as emotional learning.

This finding has far reaching implications for cognitive therapies to fight over-eating, but may also suggest new, easy to implement strategies for memory enhancement. Pistachios anyone?

In the study, rats being trained on memory tasks were administered a substance called oleoylethanolamide (OEA) that normally increases in the gut after the ingestion of dietary fat (not carbohydrate or protein). Several days later, the rats given OEA performed better on the tasks than rats that were not, demonstrating enhanced learning.

To determine the neural pathway involved in this effect, the researchers chemically blocked signaling in the region of the brain that receives neural inputs from the gut (solitary nucleus), which abolished the effect of OEA. Next they selectively blocked neural transmission between this region and another region of the brain that has been shown to be critical for emotional learning (amygdala). This also eliminated the memory enhancement effect of OEA, indicating that emotional memory and memory enhancement from fatty food ingestion share the same neural network.

These findings may partially explain the emotional component that is often associated with chronic over-eating, something that frequently involves learned habits triggered by emotional situations.

However, OEA does more than enhance memory. It is also critical in feelings of satiety after a meal (decreasing hunger) and has been implicated in controlling body weight. Is it possible this new information could be harnessed for the power of good?

Low-fat diets have proved to be a colossal failure for both health and weight loss, partially because they encourage over-consumption of starchy (usually refined) carbohydrates. Moreover, vegetable and fish oils are protective against many chronic diseases that plague Western culture. Regularly seeking healthy fats in your diet can help control hunger, promote weight loss and lower risk of disease. But it now seems that healthy fats could also be a useful tool in overcoming emotional eating, a problem more complex than the standard weight gain that comes from 21^st century living.

Another interesting corollary of this study is that fat (specifically oleic acid, a healthy fat found predominantly in olive oil and nuts) may enhance learning and memory. Since the benefits of OEA were only evident when it was administered at the time of or immediately after training, the next time you study or prepare for a presentation you might want to have some nuts around to snack on. Almonds, cashews, hazelnuts, macadamia nuts, peanuts, pecans and pistachios are highest in oleic acid.

Are you interested in foods that could provide cognitive enhancement?