Coconut oil has become more and more popular in recent years, with a huge increase in sales in health food stores, local groceries, and in supermarkets, and taken the media by storm 1. However, there has always been a controversy regarding whether or not coconut oil is healthy for you. My opinion on this issue is: you want to replace all the oil you eat with coconut oil? Probably not.
Nutrition content of coconut oil
So why did the idea of “coconut oil is good for you” came into awareness at the first place? According to the USDA National Nutrient Database, one tablespoon of coconut oil contains 117 calories, 0 grams of protein, 13.6 grams of fat (11.8 saturated, 0.8 monounsaturated and 0.2 polyunsaturated) and 0 grams of carbohydrate 1. Coconut oil is made up of 100% fat. However, the structure of fat in coconut oil differs from the traditional saturated fat often found in animal products. Unlike animal fats, tropical oils such as coconut oil can be solid, semi-solid, or liquid depend on the room temperature, and do not contain cholesterol 3.The lipid profile of coconut oil is what make some people believe that it is healthy for people. It has an unusually high amount of medium-chain fatty acids or triglycerides (MCFAs or MCTs), which are harder for our bodies to convert into stored fat and easier for them to burn off than long-chain fatty acids or triglycerides (LCFAs or LCTs) 1. These MCFAs are lauric acid, capric acid and caprylic acid, which are some of the rarest fats in nature 2. There are studies shown that coconut oil will increase HDL level and decrease LDL level, which would help to prevent cardiovascular diseases. Diets high in MCTs (65% of coconut oil’s makeup) have been shown to improve glucose tolerance and reduce body fat accumulation when compared to diets high in LCTs, and coconut oil could improve insulin sensitivity in type 2 diabetics 1.
So what is the problem?
Despite of all the studies and health benefits of coconut oil, USDA and American Heart Association still disapprove of the idea of coconut oil being the healthier oil to eat for general public. The American Heart Association recommends limiting all saturated fats including those from tropical oils without discretion as to whether they contain MCTs 1. In other words, coconut oil is still saturated fat that needed to be limited in the diet. If you are wanting to replace your oil for real health benefits, switch from saturated fats to unsaturated fats by using vegetable oils like soybean, canola, corn, or olive oil 2. Furthermore, there is still no consistent body of data to indicate coconut oil has documented specific beneficial effects4. We cannot make health conclusion based on just few articles and studies.
In conclusion, just don’t go “cuckoo” for coconut oil, go for unsaturated fat oil. Because “fat is good, fat is important, and unsaturated fat has health benefits”4.
- Medical News Today, What are the health benefits of coconut oil? Written by Megan Ware RDN LD, http://www.medicalnewstoday.com/articles/282857.php, published October 1st, 2014, accessed July 1st, 2015.
- Betterway Health, Top 25 Coconut Oil Uses and FDA Controversy. Written by Dr. Eric Zielinski, http://www.betterwayhealth.com/blog/top-25-coconut-oil-uses-fda-controversy/, published May 28th, 2015, accessed July 1st, 2015.
- WebMD, The Truth about Coconut Oil, http://www.webmd.com/diet/coconut-oil-and-health, accessed July 1st, 2015.
- Don’t Go Cuckoo For Coconut Oil, Ask Tufts Nutrition, Tufts Nutrition, Summer 2014 Vol. 15 No. 2.
A fun feature of NUTR 238 is our annual econ-of-food potluck dinner, to celebrate the privileges of modern food culture. So many choices! The idea is to show off our amazing dietary optimization skills, with prizes for the best dish in each of several categories.
We start with the oldest challenge in the economics of nutrition, with the dish that best contributes to a least-cost diet. We also have a prize for meeting nutrient requirements with the least environmental impact, and another for meeting your RDAs with the most cultural significance. And, lest we forget life’s most implacable constraint, a prize for doing so with the least preparation time. We had serious economists judging the contest, Sean Cash and Anna McAlister, but very unserious prizes: what my wife Diane calls the universal food.
Here are the winners: From left, Anna (judge), Krista Zillmer (for a spectacular Spaghetti Squash Chow Mein) , Quinault Childs (for delicious cricket-flour cookies), Sean and me (with prizes), Aaron Shier (bowing to Milky Way Day) and Kristen Caiafa (for a bag of what is really, truly the global standard in least-cost nutrition).
Of course we also had many other wonderful dishes, from Iyamide’s Sierra Leonean stew to Ashley’s classic carrot cake. As you can see from the detritus on the table, we ate it all.
Happy spring break, everyone!
PS: NUTR 238 alumni can check out past potluck photos here.
It’s January 2nd, time to get ready for the year’s firehose of food-related news and data.
Our daily challenge is to make sense of events, without retreating into a comfy filter bubble. Economics can help with that. For students registered in NUTR 238 our course website is now up. Class will start on January 15th, and eventually get into news analysis exercises to diagram the economic principles behind current events, and data analysis exercises to visualize comparisons over time and across countries. Before then, or if you’re just browsing, here are some shout-outs to some numbery news sources for the year ahead:
— My vote for best newspaper innovation of 2014 goes to the New York Times’ Upshot, whose launch was itself newsworthy. Among their great food stories last year were the Fried Calamari Index, and What 2000 Calories Looks Like.
— One media surprise was the rise and rise of podcast journalism. Not just Serial, but also the great Planet Money and NPR econo-news , with fun food stories like Why is Milk in the Back of the Store, and When Do Chefs Buy Generic Foods?
— The dataverse just gets denser and denser, with better and better data visualization. My vote for best quick advice is these great posts about how to clear off the table and remove to improve. In class we’ll see a ton of numbers, try hard to avoid numbo-jumbo,and do our best to be use data thoughtfully like this great chart on how gluten diverged from celiac.
The food world is full of surprises – so keep an eye on food-related news with sites like the food, nutrition and agriculture sources to your right, and if you’re enrolled in NUTR 238, use this blog to share what you find.
Happy new year!
Amazing photos. Who knew that breakfasts could be so colorful and varied? And seeing all these examples side by side reveals a lot about food choice.
Clearly, price and income does matter, but so does tradition and the personality of each individual child and their family.
One big influence on food choice that’s nicely illustrated by these examples is the difference between weekend and weekday breakfasts. The weekday breakfasts are really rushed, more like least-time meals than least-cost.
It turns out that meals are so much better when we have more time to prepare and eat them. Once people reach a high enough level of income to afford the nutrients we need, time allocation becomes as important as cash expenditure — and that tradeoff is especially visible at breakfast.
A lot of economists these days are very interested in how nutrition is influenced by our time use, with research on issues such as how mothers’ employment influences childhood obesity in the US, contributing to a global trend towards time-scarcity.
One of the biggest challenges in food policy is how to make food that not only nutritious, but also quick and convenient. Any ideas?
On the T this week, just before the start of new school year studying food choices, I just loved seeing these two ads next to each other:
|From Drop Box|
Our food system offers many wonderful contrasts like this: sometimes we can spend a leisurely Sunday exploring fresh, traditional and local food — but sometimes we want a jolt of fast, new caffeinated drinks from far away. My own fridge is full of such contradictions. Care to guess what opposites might lurk in there?
NYT article here.
What do you think the reaction will be, for both consumers, and for producers who currently use trans fats in their products? What do you think of the proposed ban?
Hello everyone! I researched the topic of colony collapse disorder on honey bee colonies in the United States for my midterm project. While this topic has been around for several years, the importation of foreign bees has begun more recently. This importation has altered the economic impact of declining populations of honey bees in America. You can watch my video presentation here:
I hope you enjoy learning about this topic!
There were three economists who shared the Nobel Prize in Economic Sciences this year, and one of them was Robert Shiller, a professor at Yale. He is interviewed by the Washington Post here.
Their topic area is financial markets, so it’s not explicitly food related…but in the interview, Professor Shiller discusses his views on rationality…an important assumption underpinning many economic models, including the ones we use in class. He says, “When I look around, I see a great deal of foolishness, and I can’t believe it’s not important economically.” He’s also skeptical of the idea that everyone will properly manage their retirement savings…people are mired in habit and inertia and you’d need to allocate lots of time and energy to making financial decisions.
These ideas can be related to food economics too…quite clearly on the consumption side, and also on the production side. People do irrational things all the time when it comes to the foods they buy and eat. Habits and psychology are significant drivers of food and health decisions, as any RD or MD can tell you. So…what do you think? Are people rational when it comes to food decisions? Are people each “rational” in their own way, making it hard for economists to model their decisions? Or, are people just not rational at all, and driven mostly by urges and habits when it comes to food? Does it depend on the person? How might the answer affect food policy?
I also appreciate Prof. Shiller’s general skepticism and love of facts.
We’ll get more into this topic area when we talk about market failures later.
Last Friday I was watching CNN and the government shut down was a hot topic (and still is). What stood out the most were reports about how a prolonged government shutdown might affect grocery prices, particularly the price of milk. The news claimed that milk prices could double! I didn’t know if this was actually possible, a gallon of organic milk is about $4.50. Would people actually pay $9.00 for milk? It made me wonder how a rise in price might affect the choices consumers would make at the grocery store. Would people opt for milk alternatives like coconut, soy, or almond milk? Would people choose to consume more of other beverages instead? How would this affect the price of cereal?
Today my family in Puerto Rico told me that in the past few days the price of milk has risen to $8 a gallon. I wouldn’t consider milk to be a staple of the Puerto Rican diet, but a lot of popular baked goods are made with milk. So I’m curious about how a rise in milk prices will affect the price of other popular foods. But my question to the class is, how would a rise in milk prices affect your consumer choices?
One good opportunity to improve public health is in grocery stores, as psychologists and economists work together to help retailers increase sales of, well… groceries.
Today’s New York Times has a terrific news story about this frontier of research by their reporter Michael Moss. Moss just released a lively new book about how food manufacturers raise the levels of salt, sugar, fat and other ingredients in processed foods far beyond what you’d add in your own kitchen, while research at Tufts and elsewhere has shown similar problems in restaurant food. In contrast, grocery stores sell a lot of fruits, vegetables and other relatively healthy stuff, generally around the perimeter of the store. So, in the choice between processed foods, restaurant foods, and plain old groceries, what determines how consumers’ spend their hard-earned money?
Advertising. Taste and convenience are also important, as is factual information about nutrition and health. But those things are often hard to change, in which case advertising can provide the swing vote that nudges consumers towards what they actually buy. The effectiveness of advertising helps explain why we see so much of it.
The research featured in today’s NYT is about a great new display ad being tested in grocery store shopping carts: a mirror, reflecting the shopper’s face back at them. The researchers’ hypothesis is that commercial ads distract people from their own desires, so that a mirror reminding consumers of who they really are would nudge them back towards choices they are less likely to regret later when they leave the store.
What do you think? Where might a mirror help you make more optimal choices?
And to continue thinking like an economist, consider the problem from the store’s point of view: in your experience, when do they try to sell you things you might later regret, as opposed to helping you find things that actually fit the long-term you?
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