6 Nutrition Myths Debunked!

My good friend Mike Polis MS, RD, LD of Cornerstone Training and Nutrition and I recently put together a list of some of the most common nutrition misconceptions.  Here are the top 6 that we came up with:

**Myth #1: **

**I need to limit my intake of fruits and vegetables because they contain too much sugar:  **Of all the nutrition claims out there, this one ranks as one of the craziest. 

In my experience this misconception is often the result of the following situation: a personal trainer or nutritionist asks a client to recall the foods they ate in the past few days.  The client recalls his/her diet and the diet the client recites is nearly perfect: appropriate amounts of fruits, vegetables, lean meats, whole grains, and low-fat dairy. 

The nutritionist/personal trainer usually knows where the trouble spots in a diet are and realizes the client needs to cut calories to reach his/her weight loss goals but in this situation cannot figure out where the client needs to cut calories to reach these goals.  After analyzing the diet the trainer isn’t going to suggest cutting back on sources of lean protein such as fish, chicken, low-fat dairy or healthy fats/vitamins such as avocadoes, or salads.  Instead, fruits and vegetables, especially starchy vegetables, or those perceived as starchy vegetables (carrots) are going to be “called out” as the culprits and eliminated from the diet. 

The client will be told that he/she cannot lose weight because they are eating too much sugar coming from fruits and vegetables.  As a nation, we have become fixated on sugar when really we should be concerned with calories, not sugar.  Do you know how many calories are in this 2 pound bag of baby carrots? 

• 225 calories
• 350 calories
• 563 calories
• 851 calories If you ate this entire 2 pound bag of baby carrots you would still only be consuming 350 calories (or the equivalent of eating less than 2/3 of a Big Mac).  Another example of how few calories carrots (a supposedly high sugar vegetable) contain, one baby Twix bar (50 calories) contains the same number of calories as 14 baby carrots!

  

  I think that most of us would agree that, on average, fruits contain slightly more sugar than vegetables.  Yet, if we compare the number of calories in a baby Twix bar versus ½ cup of commonly eaten fruits (Table 1) you will see that in 17/21 cases you would actually save calories by eating ½ cup fruit in comparison to a baby Twix bar! 

  

  When someone tells you to stop eating fruits and vegetables because there is too much sugar in them, tell them to 1) shut up and that 2) their math doesn’t make any sense.

I would NEVER cut fruits and vegetables out of your diet.  Instead, focus on 1) expending more energy through daily activity and/or 2) reducing the serving sizes/portions of every part of your diet (lean meats, whole grains, etc), not just fruits and vegetables.

**Myth #2: **

Dairy products promote inflammation and chronic disease:  When you hear the term “inflammation” a negative connotation likely comes to your mind.  We have been conditioned to dislike inflammation and rightfully so.  Chronic low grade inflammation has been associated with the development of cardiovascular disease, diabetes, and some forms of cancer (1).  For the good of our health, we are told to avoid (or suppress) inflammation at all costs. 

So does this mean we should avoid dairy to limit inflammation? 

If you Google search “dairy products and inflammation” your suspicions that dairy produces considerable amounts of inflammation will be confirmed.

The first four search results indicate that your friend or trainer (or the internet) who told you dairy wasn’t good for you was right.  However, the scientific community, by enlarge, has come to the opposite conclusion! 

Dairy consumption actually reduces inflammation!  In a recent cross-sectional study individuals consuming >2 servings/dairy/day had concentrations of molecules associated with inflammation in their blood between 10 and 30% lower than individuals consuming 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The reasons why dairy may actually improve your inflammatory profile are complex and poorly understood but may be due to the calcium, magnesium, vitamin D or other yet undefined proteins found in dairy products. 

So the bottom line is, if you currently eat dairy, keep eating it.  If you don’t like dairy or can’t eat dairy don’t worry, there are other foods you can eat to obtain the nutrients you would otherwise consume by eating dairy.  Dairy and inflammation?  Keep worrying about your real problems and don’t waste your energy on those that are pretend.

**Myth #3: **

Processed food is junk food and should not be eaten: A recent review article on processed food posed the question, “Is ‘Processed’ a Four-Letter Word?…” ( ADDIN EN.CITE  ADDIN EN.CITE.DATA 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This question is indicative of the stigma that processed foods conjure up when discussed by many health conscious Americans.  In response to the term “processed” food, some health conscious Americans are prone to saying things such as

“I would never allow my children to eat processed foods.”

“Processed foods contain dyes, additives, adulterants, and chemicals harmful to you or your children.”

“You should only be eating whole, natural foods.”

Yes, I agree that we should all be eating whole, natural foods but not all of us have the taste, time, culinary skills, or budget to prepare and eat only whole, natural foods.  Processed food, like virtually every nutrition topic, is not black or white, 1 or 0, yes or no.  There is a certain amount of gray area in the discussion of nearly every “processed” food’s nutritional content.

There is a difference between processed food and what you would call “junk food” and not all processed food should be considered junk food.  Yes, Doritos, Cheetos, soft drinks, cakes, and cookies are junk food as they deliver essentially ZERO nutritional value but what about cereal, pasta, bread, fortified products, canned beans, and canned fruits and vegetables?  These foods have been considerably processed and are far from their native, natural state, yet in many cases, are vital contributors to the nutritional quality of the typical American’s diet. 

When we dissect an American’s diet between the years 2003 and 2008 on the basis of the 2010 Dietary Guidelines for Americans ( ADDIN EN.CITE  ADDIN EN.CITE.DATA 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*6) 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*, we see that processed foods contributed

• 55% of dietary fiber

• 48% of calcium

• 43% of potassium

• 34% of vitamin D

• 64% of iron

• 65% of folate

• 46% of vitamin B-12 These nutrients are extremely important to our health and processed foods contributed to greater than 50% of several of them.  On the other hand, processed foods also contributed to

• 57% of total calories

• 52% of saturated fat

• 75% of added sugars

• 57% of sodium Whether a food comes in a can, is frozen in a bag, is far removed from its original state (cereal), is dried, fortified, or enriched, processed foods contribute a considerable amount of nutrition to the American diet.  Without food processing and food fortification many Americans would not meet their dietary goals.  Processed food doesn’t necessarily mean junk food.  Processed food that is nutrient dense (tightly packed with nutrients) is NOT junk food.  Junk food is food that is calorie dense (tightly packed with calories) and not nutrients. 

Before you stigmatize someone for telling you they recently ate a “processed” food, consider whether that food was nutrient dense or calorie dense.  Is processed food a four letter word?  I don’t think so.

 

myth #4:

**To lose weight you should eat 5-6 small meals a day.  **If you have ever stepped foot in a gym I think you have probably heard this line before, “The best way to boost your metabolism and lose weight is to eat 5-6 small meals/day”.  The theory behind this nugget of wisdom is that your metabolism increases each time you consume a meal and decreases in between meals.

To keep your metabolism “firing” it is best to spread your meals out throughout the day to take advantage of this increase in metabolism with meal consumption (known as the thermic effect of food).

But is this story really true?

Let’s dive into this issue by first examining the driver of weight gain or weight loss, energy balance.

Energy Balance

In simplest terms, think of nutrition as a system with an input and an output sector.

Input includes the foods and beverages we consume (calories).

Output includes our resting energy expenditure (REE), the thermic effect of food (TEF), structured exercise energy expenditure, and involuntary movement.

• REE refers to the rate at which the body expends energy while at rest to operate basic life functions – such as breathing, sweating, filtering blood, and heart rate.
• TEF is the energy used to digest, absorb, and distribute the nutrients in the food and drink you consume.
• Structured exercise energy expenditure is just that. The amount of calories we burn during (and after) exercise. This is typically referred to as active energy expenditure (AEE).
• Involuntary movements include energy expended through non-planned exercise activities such as fidgeting at our desks, tapping our foot, pacing, or walking to your vehicle after work. These movements are also referred to as NEAT (non-exercise activity thermogenesis). Exercise and REE: Burn baby, burn

  

  Eating frequently in an effort to crank your metabolism into high gear stems from archaic epidemiological research and non-evidenced based claims perpetrated by fitness enthusiasts.

As calories are restricted, the TEF is reduced and if we are trying to lose weight, eating smaller, more frequent meals may actually do more harm than good.

In essence, the fewer calories (energy) we take in combined with a high meal frequency, may** lower** the overall response of the TEF (7).

To make matters worse, evidence has indicated that as we decrease the number of calories we consume, we also typically become less active.  Not necessarily less active with conscious exercise, but perhaps less active expending energy via NEAT and involuntary bouts of movement (8).

Combine this with a decrease in REE (a natural byproduct of a decreased calorie intake and weight loss) and we are drastically decreasing our overall caloric burn.

Yet another reason not to get on the “small frequent meal bandwagon” is that research has suggested the effect of meal frequency on metabolism does not lead to a greater fat oxidation (9).

Please note: fat oxidation is required for weight loss.

Finally, it should also be noted that the TEF constitutes a measly ~10% of total daily energy expenditure while BMR and exercise (including NEAT) make up the bulk (90%) of energy expenditure (see picture below).

So, what should I be doing?

Shifting one’s focus to:

• controlling calories and macronutrients based on your estimated needs while
• using exercise to increase energy expenditure,
• acquiring (lean body mass) development via resistance training, and
• reaping the benefits of the” after burn” effect from high intensity training and thereby creating the real “thermic effect.” In summary, there is no conclusive evidence that an increase in meal frequency correlates with a higher metabolic rate and/or reduction in body fat – given total calorie intake is controlled for (11, 12), which ties in with evidence which suggests no correlation between a higher meal frequency and fat oxidation (9).

The TEF is completely independent of REE, the energy burned at rest by the human body.  Lean body mass (LBM) and activity level, both of which are independent of TEF, are the primary drivers of your metabolic capacity.

If the TEF resulted in a higher “metabolic rate,” an increase in meal frequency would likely increase LBM and BMR.

To date, there is no data supporting this hypothesis.

As I mentioned earlier, but cannot stress enough, a decrease in metabolic rate is the byproduct of restricted calories and perhaps a decline in NEAT vs. a lower meal frequency.

So, what do I know?

Eating 5-6 small meals may actually:

• Decrease the thermic effect of food (TEF)
• Do nothing for weight loss or increased fat oxidation. Practicality of meal structure

Select a meal pattern that is most appropriate for your schedule and needs.

Listen to your hunger cues and become more in-tune with your body’s physiology by answering the following questions:

• Are you mistaking hunger for thirst?
• Are you low on dietary protein consumption? (Note that dietary protein promotes feelings of fullness and satiety, which can keep hunger levels at bay).
• How many meals/day feels right to me?
• Do I need to change the times I eat my meals to get through the day?
• Do I need to eat a larger breakfast or lunch to make it to supper? Following an arbitrary “8 meals per day” protocol because your favorite professional bodybuilders and figure competitors do so is only opening the door for unwanted gastrointestinal distress and a decline in finding enjoyment in your food.

Select the meal pattern that is most appropriate for you schedule and your needs and call it the (insert your name here) plan.

 

myth #5:

**For building muscle, the more protein, the better.  **Dietary protein has long been associated with “muscle building” in the general fitness community. And there is certainly some truth to that. However, context is also important.

Let’s take a look.

Protein requirements are individualized based on your goals, height, weight, age, gender, body composition, and activity level.

More protein in the diet does not necessarily translate to more muscle on Jane Doe’s frame. There is a dose dependent response with protein, and possibly an anabolic cap to just how much protein you can effectively absorb and digest.

Strength athletes and folks focused on building muscle may benefit from a higher protein intake but how much is too much and how much is just right?

The current Recommended Daily Allowance (RDA) for protein for folks at a healthy body weight (BMI