RFF#110 – The “Crown Cafe” on Liberty Island is a leader in menu-labelling

When I visited the Statue of Liberty a few weeks ago…

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…I was surprised to see that the “Crown Cafe” (located on Liberty Island)…

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…not only included calorie information on their menu boards…

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…but also gave a comparison of their burger in relation to other burgers…

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…and even printed the total calories and total fat of each purchase on the receipt (note: I only purchased tea and coffee, so understandably the caloric total was remarkably low)…

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But wait a minute, let’s return to that “burger comparison” for a moment, because it illustrates a concept that I’ve been trying to convince people of for years.

Notice how the the “Crown Burger” has only 515 calories and 816 mg of sodium—less than all other options. While these numbers suggest that the “Crown Burger” is the healthiest choice, I encourage you to take a closer look. “Crown Cafe” is providing its customers with a key piece of information that is essential for making a valid comparison…

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That piece of information is portion size. While the other four burgers are 5.33 oz, the “Crown Burger” is only 4 oz. Hence, part of the reason why it’s lower in calories and sodium is because it’s smaller.

In fact, when you look at the nutrient density (a standardized measure of nutrient content per standardized amount), the “Crown Burger” actually has a higher calorie density and a higher sodium density when compared to the “Fudruckers Burger”.

Here’s how the math works out:

CROWN BURGER (4 oz) – $8.95

515 calories –> 515/4 = 128.75 calories per oz

864 mg of sodium –> 864/4 = 216 mg of sodium per oz

FUDRUCKERS BURGER (5.33 oz) – $8.39

669 calories –> 669/5.33 = 125.5 calories per oz

975 mg of sodium –> 182.9 calories per oz

Considering this, the “Crown Burger” is not the best choice. By choosing the “Fudruckers Burger” you get more food, with a lower calorie and sodium density, for less money. Sure, the “Crown Burger” contains less calories overall, but whose to say you won’t get hungrier sooner and make up for those extra calories with a snack later on?

I’ve been concerned about the effect that portion size has on confusing caloric comparisons since I first began doing menu-labelling research a few years ago. Current policies that only require the labelling of calories can be deceiving if similar food options are different sizes. As a matter of fact, I was so concerned about this issue, I even did research to investigate whether including portion size information on menus would help consumers select meals with a lower calorie density. However, my research showed that including portion size information had no effect. So at this point, I’m not quite sure how to address this “niche menu-labelling” issue. Any ideas?

Long story short, I was encouraged to see that “Crown Cafe” is leading the pack by providing nutrition information to help consumers make an informed choice. If only all restaurants could do this!

 

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RFF#97 – There’s one time when you can guiltlessly add salt to your food…

…after you’ve exercised excessively and have consequently sweated excessively.

The story behind today’s post began two weeks ago when I played tennis for three hours…drank a lot of water…went to sleep…and woke up at 4:00am with one of the worst headaches of my life!!!!

You see, normally your blood has a balance of sodium [Na] and water [H2O] (in addition to many other things, but for the sake of today’s post we’ll just focus on the sodium)…

 

Balance of Sodium and Water

Note: Ratios are not to scale

 

But when you sweat, you lose both water and sodium…

 

Balance of sodium and water - after sweating

 

And if, like me, you exclusively drink water post-exercise, your blood steam will look like this…

 

Balance of sodium and water - after drinking water

 

This condition is called hyponatremia (hypo=low, natremia=blood sodium). The consequences of hyponatremia include dizziness, headache, nausea, and oh…did I mention death! For years I suffered from hyponatremia after playing sports. No one could tell me why, and I never figured out the problem until I took Physiology 302.

Sports drinks are the obvious solution. Me of course, having made a personal pledge to never drink caloric beverages, fell victim to my own good intentions.

However, while replacing electrolytes (such as sodium) is part of the solution, electrolytes alone won’t completely solve the problem. That’s part of the reason why sports drinks don’t exclusively contain electrolytes. And while they probably contain more sugar than you really need, sugar is nevertheless an essential ingredient.

That’s because on its own, sodium can’t pass through the cells of your intestine and enter your bloodstream. It needs to be transported. And one of the transporters that accomplishes this task is a sodium-glucose transporter, which means it needs both glucose and sodium to operate. Therefore, post-exercise, carbohydrate is needed to assist in the absorption of sodium.

Note: This diagram is highly simplified

Note: This diagram is highly simplified

 

While consuming a sports drink will get the job done, sports drinks are not your only option, anything that contains carbohydrate and sodium should do the trick (ex. crackers, juice, a pickle, etc.).

In conclusion, it’s kind of funny how so much of my work is dedicated to preventing people from suffering from having too much sodium, meanwhile I somehow manage to let myself suffer from having too little!! So as I sit here typing this story, after having just played tennis for three hours…rest assured, I’m snacking on a tiny bit of pasta and vegetables, to which I added a dash of salt!

Here’s some photos to lend cred to my story…

Since it's difficult to take a picture of yourself playing tennis, I opted for a shadow selfie.

Since it’s difficult to take a picture of yourself playing tennis, I opted for a shadow selfie.

 

I love those pink laces!

I love my pink laces!

 

–I learned about this fact from: Years of unpleasant experiences and my third year physiology professor Dr. French!

RFF#94 – My daily sodium intake is 1817 mg

In the process of learning today’s—admittedly self-indulgent—post, I turned myself into a proverbial lab rat, got paid $50, and much to my surprise, learned an important lesson in research methodology.

Let me explain…

It all began a few months ago when my colleague, Dr. JoAnne Arcand, created the Salt Calculator, a simple online tool that allows anyone to quickly calculate their sodium intake (by the way, I encourage you to check it out: http://www.projectbiglife.ca).

Being a good scientist, Dr. Arcand set out to validate the accuracy of the calculator by comparing it to more traditional methods for measuring sodium intake including:

1) The self-explanatory 3-day food record, where people record all of the food they consume over a three day period,

and

2) The equally self-explanatory but substantially grosser, 24 hour urine collection. You heard me right, because excess sodium is excreted in urine, the best way to measure sodium intake is to collect your pee for 24 hours!

By now you can probably imagine how I fit into this story…being slightly sodium obsessed, I’ve been looking for an opportunity to get an accurate measure of how much sodium I consume. So naturally, I couldn’t resist…I enrolled myself in the study.

While collecting my urine for 24 hours was unpleasant, there was something else about the experience that I found even more displeasing…I was shocked by my own laziness when it came to the 3-day food record!!!!

You see, when I enrolled in the study, the delightful research assistant gave me a thorough schooling on the procedure that I was to adhere to. Those of you who know me, know that I’m the kind of person who typically follows instructions. Nevertheless, despite the fact that I’ve been teaching undergrads about the proper procedure for recording food intake for years, I found myself falling victim to the classic blunders: not recording my food as I ate it, not measuring my food, and worst of all, letting the fact that I’m supposed to record what I eat influence my food choices. Despite my utmost respect for the research process, I was a mildly non-compliant subject!

While I feel guilty and embarrassed, the purpose of today’s post is not for me to seek absolution from my readers, but rather, I’m telling this story because my experience was surprisingly educational. You see, it’s a well-accepted fact among nutritional scientists that our ability to measure food intake is bad. But despite the fact that I’ve long known this, it wasn’t until I became a participant on the other side of the research process that I deeply understood the degree to which our inability to accurately measure food intake undercuts nutrition research. How can we confidently link a disease outcome with diet if we can’t accurately measure what people are eating? As you can see, this realization has profoundly influenced my views on nutrition research.

When I enrolled in this study, I was mostly interested in learning about my own sodium intake. However, this is a classic example of how sometimes you set out learn one thing, and in the process you realize that the true lesson you’re meant to learn is something you couldn’t foresee and is perhaps something much more profound than what you expected.

If you’ve stuck with me for this unusually long post, there are two take-home messages:

1) For non-scientists…I hope that by sharing this story, I’ve shed light on one of the reasons why there is so much controversy surrounding nutrition. Research is hard to do. We as humans are imperfect, and thus in turn our research is imperfect, it’s that simple.

2) For scientists, particularly scientists-in-training…I hope that you will be inspired to turn yourselves into proverbial lab rats, you never know what you might learn when you put yourself on the other side of the lab bench.

–A special thank you to Dr. JoAnne Arcand, whose study inspired this post; Zhila Semnani-Azad, for many things, including sending me my results; and lastly the FLIP girls, for being great research coordinators!

RFF#92 – 73% of products in India do not disclose sodium content on their food label

In North America we often take it for granted that we can just turn over a product and read its Nutrition Facts table.

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Though people often hate on the Nutrition Facts table–accusing it of being confusing and archaic–it’s easy to forget how privileged we are to simply have that information available to us.

I learned about this fact from: Sampath, Janani. “Doctors Push for Sodium Levels on Food Labels” The Time of India, May 18th 2014. And thanks to Google alert, for alerting me to this fact!

RFF#85 – Salt may enhance the action of carcinogens in your stomach

With all the controversy surrounding salt, I figured it’s worth talking about the adverse effects of salt beyond its ability to raise blood pressure.

It’s a little known fact that according to the American Institute for Cancer Research, salt is a “probable cause of stomach cancer”. This is because salt has been shown to have a synergistic interaction with gastric carcinogens and can increase the production of carcinogenic N-nitroso compounds.

That being said, the association between salt and stomach cancer may be modified by the presence of H pylori bacteria. The research suggests that having an H pylori infection in addition to consuming a high salt diet can have a multiplicative effect on increasing risk for stomach cancer.

In conclusion, despite all of the hoopla around sodium these days, it remains clear that sodium intake should be minimized.

I learned about this fact from: http://www.dietandcancerreport.org/