Why you shouldn't trust Food Pyramids

Food pyramids have been around for decades.  The first pyramid was published in Sweden in 1974.  However, the most widely known food pyramid was introduced by the United States Department of Agriculture (USDA) in 1992 (pictured on the left), was updated in 2005 and then replaced in 2011 by "my plate", which is only a slightly bettered version of the food pyramid.

Many nutritional experts, such as Harvard nutritionist Dr. Walter Willett, believe the 1992 pyramid does not reflect the latest research in dietetics.  Technically the pyramid allowed dietary choices that have been linked to heart disease:  three cups of whole milk and one 230g hamburger daily - for example.

The fats group as a whole have been put at the tip of the pyramid with a warning to eat as little as possible, which is problematic in itself.  If you take the pyramid at face value you would believe that you should avoid the fats group as much as possible - this could lead to the health problems.  Fat is essential to maintain optimum health.  Research has found that unsaturated fats aid in weight loss, reduce heart disease risk, lower blood sugar and even lower cholesterol.  This type of fat can be found in olive oil, nuts, seafood, and avocados.  Also, they keep you feeling satisfied for longer, and help keep blood sugar at steady levels and help brain function.

However, one of the most worrying parts of the food pyramid released by the USDA is the widest section at the bottom suggests that what we should eat the most of is grains, pasta and breads despite the evidence showing that grains break down into sugar in your body and therefore promote fat accumulation and drives insulin resistance and related diseases including diabetes, heart disease and cancer.

So why grains?  They are cheap and easy to grow and they are also cheap and easy to buy, you can feed more people cheaply with grains than growing vegetables or raising cattle.

Saturated fat has always had a bad name too, but there is also mounting evidence that saturated fat is actually an incredibly healthy, nourishing, and all-natural fat that we humans have been thriving on for generations.  Saturated fats when included in the diet, give lots of energy and leave you feeling satisfied for longer therefore preventing you from eating too much.  They are also necessary for the absorption of fat soluble vitamins such as vitamins A, D, E and K and are also needed for mineral absorption and many biological precesses.  (For more information on this type of fats you can see my post The Truth About Saturated Fats).

Dr. Mercola has designed a food pyramid based on Nutritional Science - which would promote optimal

health.  He believes, and I am inclined to agree with him, that the USDA pyramid is based on agricultural subsidies and industry lobbying efforts.  His pyramid is almost like turning the USDA pyramid upside down.  He features healthful fats and vegetables on the bottom - the base for what we should all be eating.  50% of our daily calorie intake should come from healthful fats and vegetables such as, avocados, coconut oil, nuts and raw butter.  Vegetables should represent the main bulk of your daily intake, they are low in calories but high in a huge number of critical nutrients.

He then goes on to suggest high quality proteins, followed by a moderate amount of fruits.  Why so few fruits?  Well according to Mercola, lots of fruits are very high in fructose, the natural sugar found in fruit, and Mercola would really prefer we stay as far away from fructose as possible.  Here I am in two minds... yes, if you eat lots of fruits with a high fructose content it is possible that you will have to deal with health problems, however, Mercola's main problem seems to be with High Fructose Corn Syrup which has been highly processed and is completely different from the natural Fructose found in fruits.  The human body has ways of digesting the natural fruit fructose, as with everything - just don't over do it!  There are plenty of tables on the Internet which show the content of fructose in different fruits.  My advice would be to keep the high fructose fruits to a minimun and in the mornings to give you an energy boost through the day, and lower fructose fruits in the afternoon evening when you don't need so much energy.

Finally at the very top of Mercola's pyramid you'll find grains and sugars.  This top part could be eliminated entirely from your diet and he assures your health will benefit greatly is you chose to do so.

Apart from the fructose question, I totally agree with Mercola's pyramid.  I highly recommend you read his article in full, you can follow this link to read it: Dr Mercola's article.

Social Nutrition:
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5 NUTRITION MYTHS

Yes, we've all heard how coffee is bad for us, or that milk is essential for strong bones, or eggs are bad for your heart or that saturated fats are bad for us... as with most myths, some are true and others have been... BUSTED!

MYTH Nº 1: YOU MUST DRINK 8 GLASSES OF WATER A DAY = NO
We have been told over and over again that drinking 8 glasses of water a day helps the kidneys to remove toxins, leads to smoother, younger looking skin and prevents cancer.

• There's no evidence to suggest that lots of water improves the kidneys' detox function - what's more, too much water may even decrease the kidneys' ability to filter toxins.
• Studies comparing water consumption and bladder cancer have come up with inconsistent results.
• As far as skin tone goes, one small study did find increased blood flow to the skin after 2 cups of water were ingested but the researchers didn't manage to discover if this improved skin tone.
• If you have a healthy balanced diet and that includes drinking water, coffee, tea and juice you will be sufficiently hydrated.
• There is nothing against drinking as much water as you like (although a huge amount is not advisable), it just isn't a necessity as the myth suggests.

MYTH Nº 2: GREEN TEA AIDS WEIGHT LOSS = HALF TRUE

Green tea was heralded as the healthy way to boost weight loss.  It was publicized that drinking green tea instead of coffee would make people lose body fat to the tune of 10 pounds in six weeks.

• The truth is green tea contains an antioxidant called epigallocatechin gallate (EGCG) which has been shown to boost metabolism and fat burning in lab tests.
• Researchers discovered that subjects in a study burned more energy over a 24 hour period when consuming EGCG plus caffeine than those subjects taking caffeine alone.
• However, when data collected from 13 such studies were analyzed, subjects taking EGCG plus caffeine over a 3 month period lost only 1-3 pounds more than subjects taking placebo.  The difference was so slight it was deemed "not clinically relevant".
• A note of warning:  the long term safety of green tea supplements taken on an empty stomach is in doubt.  In more than 24 cases, it has been linked to liver damage.  It is a better idea to stick with beverages instead of pills.

MYTH Nº 3 MILK IS NECESSARY FOR STRONG BONES = NO

Well we've all heard this one from our childhood - it has been drummed into us from the very beginning.  However:

• On the whole, research has failed to prove that consumers of dairy produce have fewer bone fractures.  6 cohort studies - including one which followed 70.000 nurses over a 26 year period - found that women who drank the most milk had no fewer hip fractures.
• Yes, milk contains calcium, but it isn't very bio available.  Other good sources of calcium are tofu, canned salmon or sardines (bones included) and leafy green vegetables.
• In countries such as Japan and India, where dairy produce intake is low, incidence of bone fractures are also relatively low.  Which tells us that bone health is determined my more than just the amount of dairy products consumed.  Genetics, physical exercise, body size and hormone levels also play an important role.
• Vitamin D is also important to bone health.  We can obtain this from our diet but sun exposure is very important as it has the greatest potential.
• A word of warning: be wary of experts who insist that bone health is impossible without 3 servings of dairy a day.

MYTH Nº 4: FISH OIL PREVENTS HEART DISEASE = YES

Oily fish such as salmon, mackerel, trout, sardines and tuna are rich in Omega-3 fatty acids eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), and have been found to be cardio protective.  Studies suggest that they relax blood vessels, reduce blood pressure, prevent abnormal heart rhythms and lower blood fats called triglycerides.

• Omega-3 has also been shown to improve brain function.  So all of us should be eating oily fish at least twice a week.  People with heart disease are recommended to consume twice as much (1.000 mg/day EPA + DHA combined).  To lower triglyceride levels you would need 3.000 - 4.000 mg/day.
• If you are not a great fish eater, fish oil supplements are a good source - however, check the label to make sure you are getting the right dose of EPA+DHA.
• Krill oil has been found to work well as it is water soluble so more readily absorbed by the body.

MYTH Nº 5: EGGS ARE BAD FOR YOUR HEART = NO

In 1984 Time magazine published an article holding eggs responsible for high cholesterol levels which lead to heart disease.

How many times have we been told that to eat eggs every day is dangerous to our health?  Well, since that Time magazine article in 1984, researchers have conducted several long-term cohort studies on eggs and heart disease, collectively following several hundred thousand people.  On the whole, this research has found eggs to be "not guilty" and that eating up to 6 eggs a week seems un-harmful for most healthy people.

• Eggs are associated with high cholesterol.  The majority of our cholesterol is made by the liver, which accelerates production when we consume saturated and trans fats.  However, cholesterol from food doesn't have much impact on cholesterol levels in the blood.  Some people are affected - they are called hyper-responders - studies have shown there can be an increase in HDL or good cholesterol together with LDL or bad cholesterol, this increase in HDL helps offset any increased risk.
• Eggs are relatively low in saturated fat, they also contain unsaturated fats which may be beneficial.  They are also a good source of protein, vitamins and minerals, and they are certainly a healthier alternative to muffins, bagels and sugary cereals.
• However, some people are negatively susceptible to consuming eggs.  Several studies have linked egg consumption to heart disease and premature death, among people who have diabetes, there is no clear reason as to why, so if you are a diabetic it is probably a good idea to watch your intake.
• On the whole, the biggest problem with eggs is how they are cooked - fried is the the least healthy, and what accompanies them; bacon, beans, fried bread, etc..