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Last Updated 12/14/2007 12:35:10 PM
Dr. Sears' research impacts Harvard endocrinologist's theories
'Ending the Food Fight' tackles the obesity epidemic
 Since he began his pediatric practice in 1995, Dr. David Ludwig has seen an astounding increase in juvenile diabetes fueled by the staggering childhood obesity problem nationwide. After working with thousands of children, he has distilled his findings in his book “Ending the Food Fight,” which helps parents to get out of the vicious cycle of fighting about what their children eat.
“To turn a vicious cycle into a victorious cycle, requires us to line up biology and behavior synergistically, with a diet that stabilizes blood sugar and hormones (called low glycemic load), a plan to make physical activity a fun, natural part of our life (not just 20 minutes on the treadmill), and age-appropriate parenting practices that transform conflict into cooperation.” Dr. Ludwig said.
Dr. Ludwig first became interested in the impact of the glycemic load (GL) after reading “The Zone” in late 1995. Although the ideas in Dr. Sears’ first book ran counter to much of what Dr. Ludwig had learned about nutrition in medical school, he was intrigued by his focus hormones, “which are the subject of my work as an endocrinologist.”
“I invited Dr. Sears to give a lecture for the Endocrine Division at Children’s Hospital Boston in 1996, and he was very well received. Even the most senior faculty members were intrigued by his unconventional notions. I was inspired to design a study looking at the effects of glycemic index on hunger and metabolism in obese children,” he said. “The results of that study, subsequently widely-quoted, launched me on a line of research that continues to the present.”
In 1997, Dr. Ludwig did that study at Children’s Hospital with obese adolescent boys. On three different days, the boys ate three meals with identical calories, but differing in glycemic load: A high GL instant oatmeal, and medium GL slow-cooking oatmeal, and a low GL vegetable omelet with fruit.
“As expected, blood sugar rose the most after the high GL meal. However, a few hours later, blood sugar crashed to values below fasting, and this triggered a surge in ‘stress hormones,’ such as adrenalin. Also, the adolescents became much hungrier and ate much more after the high GL meal than after the other two meals, a difference of 600 to 700 calories,” he said. “If only a fraction of this difference were maintained meal after meal, day after day, it could explain much of the increase in body weight observed in the US over the last few decades, as the GL of our diet has increased.
“Other studies from our laboratory have examined the effects of GL on metabolic rate during weight loss and the effectiveness of a low GL-diet over the long-term among overweight children and adults. In addition, we have demonstrated the beneficial effects on a low-GL diet on risk factors for type 2 diabetes and heart disease.”
Dr. Ludwig said that the topic of glycemic index/load remains controversial in the United States, but numerous diabetes associations outside the United States recognize the value of a low GL-diet in the prevention and treatment of diabetes and related complications.
“With continuing positive research findings, I expect changes in domestic policy to be forthcoming,” he said.
Low-fat diets as practiced in the United States for most of the last half century have been high in glycemic index/load, he said.
“For many people, consumption of a high GL-diet sends blood sugar and hormones on a rollercoaster ride that stimulates hunger, causes overeating and promotes storage of calories as fat,” he said.
In recent years, the pendulum has swung far in the opposite direction, with the great popularity of the low-carbohydrate, Atkins’-type diets, he noted.
“These diets do seem to result in more weight loss than low-fat diets for the short-term, but they are highly restrictive and difficult to follow over the long-term. Ultimately, the body and the mind rebel against severe restriction of any major class of foods or nutrients, be it fat or carbohydrate,” he said. “The low glycemic-load diet represents a perfect compromise between these two extremes, providing the metabolic advantages of the Atkins’ diet without the deprivation.”
Dr. Ludwig believes that three major forces are responsible for the obesity epidemic: Nutritional misinformation that told people to cut way back on fat and substitute refined carbohydrates; improper parenting practices, either excessive permissiveness or overly restrictive approaches; and a toxic environment that places short-term private profit over public health and the well-being of an entire generation of kids through massive junk food advertising aimed at young kids, cutbacks in physical education at school and too much time spent idle in front of a television or computer.
In his book, Ludwig describes the Optimal Weight for Life (OWL) program, one of the oldest and largest weight-management programs for overweight kids and their parents in the country.
“We have distilled our experience working with 5,000 patients since 1995 into a nine-week program for families to follow at home. In this program we offer eating and activity guidance, games, teaching tools, motivational tips, rewards, parenting practices and more, to help make weight loss easy and fun,” he said. “Each week, we focus on a different set of practical goals, offering the prospect of profound transformation by the end of the program.”
Dr. Ludwig believes it will take a long time to make the world a healthy place for children, so for now, the family must remain the last bastion of protection for children.
“This is the primary focus of our nine-week program; however, after having first focused our efforts within the home, we can then turn our attention outward. Parents can band together, to insist that schools serve nutritious and tasty foods at lunch and offer regular physical education and recreation opportunities,” he said. “We can lobby our local government to build safe walking and biking paths and establish zoning regulations that preserve open spaces. And we must insist that politicians in Washington pass legislation that protects children from manipulative and unfair marketing practices relating to junk food.”
(Dr. Ludwig, M.D., Ph.D., is an associate professor of pediatrics at Harvard Medical School and the director of the Optimal Weight for Life Program at Children’s Hospital, Boston. In “Ending the Food Fight,” he shares his program with parents everywhere, giving them all the tools they need to help their children win the food fight once and for all. For more information go to http://endingthefoodfight.com.)
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 Dr. Barry Sears is a leading authority on the dietary control of hormonal response. A former research scientist at the Boston University School of Medicine and the Massachusetts Institute of Technology, Dr. Sears has dedicated his research efforts over the past 30 years to the study of lipids. He holds 13 U.S. Patents in the areas of intravenous drug delivery systems and hormonal regulation for the treatment of cardiovascular disease.
A turning point in his research occurred in 1982. That year, the Nobel Prize in Medicine was awarded for discoveries of the role that specialized hormones, known as eicosanoids, play in the development of cardiovascular disease, diabetes, auto-immune diseases, and cancer. Since eicosanoids are only generated from dietary fat, Dr. Sears reasoned that one could apply intravenous drug delivery principles to nutrition in order to control these exceptionally powerful hormonal responses with laser-like precision. In essence, his approach treats food as if it were a drug.
This area of his research led to various patents in the area of hormonal control by essentially using food as an oral drug delivery system to modulate eicosanoids especially for cardiovascular, diabetic, and neurological patients.
The impact of Dr. Sears’ revolutionary work in the dietary control of hormonal response began with the publication of his landmark book, The Zone. Since its publication in June 1995, The Zone has sold more than 2,000,000 hardcover copies, and became a #1 best seller on the New York Times book list. In addition, The Zone has been translated into 22 languages indicating a worldwide response to Dr. Sears’ research. His second book, Mastering the Zone, published in 1997, also became a New York Times bestseller with hardcover sales in excess of 500,000 copies to date. His third book, Zone Perfect Meals in Minutes, published in 1997, quickly became one of the best-selling cookbooks of 1997 and an another New York Times bestseller. The Anti-Aging Zone was published in 1999 and provides the molecular insights into how the Zone Diet can reverse the aging process. The Omega Rx Zone, published in 2002, explores the molecular foundation of chronic disease and how high-dose fish oil can dramatically reverse it. His latest book The Anti-Inflammation Zone discusses how to combat silent inflammation in order to reduce the risk of cancer, heart disease, diabetes, dementia, and many other inflammatory conditions—and how to reverse these conditions if they are already present. To date more than 5 million hardcover copies of his Zone books have been sold in the United States.
His research has elevated food from more than simply a source of calories to being recognized as an exceptionally powerful drug. Because of his revolutionary research, Dr. Sears has been a frequent guest on many national programs such as 20/20, Today, Good Morning America, CBS Morning News, CNN, and MSNBC.
Dr. Sears continues his ongoing research as President of Zone Labs, a biotechnology company in Danvers, MA as well as the President of the non-profit Inflammation Research Foundation in Marblehead, MA. In addition to continuing research on the hormonal effects of food, Dr. Sears has expanded his research in developing innovative dietary approaches to treating cancer and neurological conditions, as well as his on-going work in treating cardiovascular diease and type 2 diabetes.
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I have been taking the Fish Oil for over 3 years now. I am 44 playing hockey and working out. The Fish oil helps with the pain that I get from playing hockey. It greatly enhances my performance on the ice and while working out. I have noticed a big difference in my energy, attentiveness and memory. If I miss a day for whatever reason, I notice a huge difference and it feels like something is missing. Anyway that is my short little story and it comes from the heart.
– Carter B.
I am a nutritionist and Ph.D. doctor of health and nutrition. For Dr. Sears to figure out balancing fat, carbs and protein, is really beyond brilliant. It is a milestone in diet history. I go over people's diet/emotional journals. Mostly all the time, we discover that the fatigue, irritability, unstable emotions were due to the imbalance in their diet. Using the Zone to balance them out, helps control weight, roller coaster emotions and gives them energy. Dr. Sears is so right when he says food is medicine. He has figured out the most powerful drug combination going, called The Zone.
Best and healthy wishes,
– Elaine W., Ph.D., N.C., M.A.
I have a very exhausting job as a flight attendant. I read the "Omega Rx Zone" about 4 years ago and started taking the fish oil. I am 47 and have been flying for 22 years. I am very active, I run and lift weights. But combining lack of regular sleep, a physically demanding job, and irregular eating patterns this job takes a toll on the body. Since taking the fish oil, I have noticed that I do not get exhausted. I get tired, but not exhausted. I stopped taking it for a couple of months and then started taking another company's fish oil. I started getting exhausted again. I came back to Zone Labs and will continue with the fish oil for the rest of my life. I believe in the product and it makes a huge difference in my life. It makes a difference with my running as well. I also bring the bars and shakes with me on the road. It is almost impossible to eat the way I should at work. I haven't found the right secret. At least I have my Zone fish oil, bars, and shakes.
– Kathryn S.
I have been in the Zone, for about 1 month now. I wanted to share with you how wonderful I think this program is. I have been a personal trainer for almost 10 years and actively compete in numerous athletic activities. The Zone program has helped me to achieve a better awareness of my nutritional needs and the results I have seen are amazing! I have lost nearly 13 lbs since I have been in the Zone. I feel more mentally alert, more focused at work, have greater intensity during my training, have made significant strength gains, and just feel better over all. With that said, I would like to thank you for helping me in my quest for "super-health"!
Thank you!
– Rob Y.
I read 'The Zone' and as exactly as I could followed the advice for diet. I noted weight loss progress. Over six months, I lost 33 pounds. One year has passed since then. I have maintained the new weight, guided always by Zone concepts. The Zone is powerful - I have found it fantastic and I am very grateful to Dr Sears.
– Lyn S.
Before I stumbled across the Zone I was weighing close to two hundred pounds and I was depressed. I used to be a gymnast as a young man. I would think, "look at me now," when I looked in a mirror. The day I found 'The Zone' book, I was intrigued and as I read it the science made sense and so, I began to follow the "treatment". I began to lose weight and I was feeling way more energetic. I am forty two years old, I am very active and my weight is down to 162 lbs, 38 pounds lost on the Zone. I cycle, walk, jog, swim and I can now perform some of the more simple gymnastic skills I did twenty years ago...I literally feel like I have turned back the clock.
Thank you!
– Jack J.
I have been on the Zone diet for 7 years. I did not go on the diet to lose weight necessarily; but fairly quickly I lost 25 pounds, going from 190 to 165; from a 36-inch waist to a 32-inch waist. I primarily did the Zone to live healthier. My health is excellent now. I just turned 62 years old. My Zone is my eating lifestyle now; I seldom stray; and I do not miss anything. It is The Good Life.
– Curtis Y.
My wife's doctor told her to read "Enter the Zone" and to do the diet, so I told her I would do it with her. After only one week on the plan we went on a strenuous hike (the first of the year), and when we stopped at our favorite coffee shop on the way home I was able to get out of the car and stand upright and walk into the place without pain or stiffness. The Zone had eliminated all the inflammation that had always forced me to stumble all humped over into the coffee shop any time we skied or hiked all day.
Thank you, Doctor Sears.
– Larry C.
I used to have a lot of knee pain when I walked or ran. I have been taking Omega Rx for almost a year now, and rarely have any pain. I believe it is the anti-inflammation action of the oil. I feel smarter as well. Thanks for developing such a superior oil!
– Joe W.
Prior to following the Zone Diet, my body fat was around 15% and my weight around 153 pounds. No matter what I did, my weight and body fat did not change much. I regularly cycled 20-30 hours per week logging well over 400 miles. That had little impact on body fat or weight. Diet also seemed to have little impact on body fat or weight. Within a couple of months of following the zone diet, my weight dropped rather quickly to 142 pounds and body fat to about 8%. I still regularly cycle up to 20 hours per week (during the summer). I have also started strength training. I eat about 16 blocks per day. I take 3.6 grams of fish oil per day, along with Vitamin E, Alpha Lipoic Acid, CoQ10, and B & C vitamins. I also take GLA, which in my opinion, has significantly reduced fatigue and improved recovery times after exercise.
– Jeremy S.
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All polyphenols have antioxidant properties than can be measured by their Oxygen Radical Absorption Capacity (ORAC), but not all polyphenols have anti-inflammatory properties. The polyphenols in Dr. Sears’ Zone Polyphenol Plus have been carefully chosen to have both.
Polyphenols are the phytochemicals that not only give fruits and vegetables their color, but also help regulate inflammation. In addition, polyphenols also activate the key enzyme (AMP kinase) that helps restore cellular ATP levels. Polyphenols also help regulate the activation of inducible inflammatory proteins (such as COX-2 and inflammatory cytokines).
There are more than 4,000 known polyphenols, and the richest sources are fruits and vegetables. In general, the more color a fruit or vegetable has, the richer the polyphenol content.
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Zone Labs’ Ultra Refined Omega-3 Concentrates are three times fresher and contain less than 1/10th the mercury than what is allowed by the Norwegian Medicinal Standard and European Pharmacopoeia Standard
Zone Labs adheres to the International Fish Oil Standard (IFOS), an independent third party validated laboratory quality standard that is more rigid than any other global standard for purity.
- No company in the worlds runs more tests with IFOS than Zone Labs
- Zone Labs receives a 5 out of 5 star IFOS rating for every batch it tests
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| Standard |
IFOS Standard for a 5-Star Ranking |
Council for Responsible Nutrition |
European Pharmacopeia |
Norwegian Medicinal Standards |
| Peroxide |
< 3.75 meg/kg |
5 meg/kg |
10 meg/kg |
10 meg/kg |
| Totox Levels |
< 20 meg/kg |
26 meg/kg |
NA |
NA |
| Lead |
< 10 ppb |
10 ppb |
100 ppb |
100 ppb |
| Mercury |
< 10 ppb |
10 ppb |
100 ppb |
100 ppb |
| Dioxans and Furans |
< 1 ppt |
2 ppt |
2 ppt |
2 ppt |
| PCBs |
< 45 ppb |
90 ppb |
NA |
NA |
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"IFOS – THE TOP GLOBAL PURITY STANDARD FOR OMEGA-3 FROM FISH"
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Zone Labs products show no detectable lead or mercury when tested down to 10ppb, which is 10 times below the Norwegian Medicinal Standard and European Pharmacopoeia Standard limits.
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Zone Labs products are three times fresher than the minimum allowed by the Norwegian Medicinal Standard and European Pharmacopoeia Standards (based on average peroxide values).
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Zone Labs starts with only wild, small fish from pristine Chilean waters and ends with proprietary validation and testing processes to achieve an IFOS certified 5 star rating.
8-Step Manufacturing Process - Quality Assured
Testing to specification all raw materials, bulk products, packaging material and finished products – always using stringent internal standards and in-process testing.
- Extraction of fish oil
- Winterization – remove limited amounts of saturated fats
- Absorption – remove heavy metals
- Preliminary Molecular Distillation – refining “touch up” to reduce contaminants
- Oil conversion to ethyl esters
- Ethyl ester thermal fractionation – remove additional saturated fats
- True Molecular Distillation – final refining to remove pcb’s and long-chain monoenes
- Rigid Processes – proprietary validation, inspection and encapsulation methods. Independent lab verification of IFOS requirements and certified 5 star rating
No farmed fish. No large fish. Pristine waters.
Zone Labs starts with wild sardines & anchovies fished from cold, pristine waters off of South America where there are less environmental impurities.
A recommended serving of Zone Labs Ultra-Refined Concentrates delivers 8 times more omega-3’s than a typical retail fish oil supplement.
Most fish oil supplements have 30% or less of the healthy omega-3s EPA and DHA, with the remaining 70% of the capsule containing unbeneficial, lesser refined fatty acids that contribute to their bad taste and gastric side effects.
Getting a clinically valid dose of omega-3’s is easy with Zone Labs’ Ultra-Refined Omega-3 Concentrates.
Typical Retail Dose = 300mg omega-3
Standard Zone Dose = 2400mg omega-3
A serving of canned tuna has 12 times less omega-3’s than
Zone Labs Ultra-Refined Omega-3 Concentrates
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Commonly consumed fish and shellfish in the United States
Mercury Source: Food and Drug Administration, FDA 1900-2004, “National Marine Fisheries Service Survey of Trace Elements in the Fishery Resource". Omega-3 Level Source: American Heart Association Website.
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Mercury level
in parts per million (ppm) |
Omega-3 fatty acids
(milligrams per 3-oz. serving) |
| Zone Omega-3 Products |
< 0.01 |
2400 (standard 4 capsule serving |
| Salmon (fresh, frozen) |
0.014 |
1200 |
| Flounder or sole |
0.050 |
480 |
| Pollock |
0.041 |
450 |
| Crab |
0.060 |
400 |
| Scallops |
0.050 |
290 |
| Shrimp |
ND* |
290 |
| Catfish |
0.050 |
270 |
| Clams |
ND* |
250 |
| Cod |
0.095 |
210 |
| Canned Tuna (light) |
0.120 |
200 |
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Zone Labs’ leading product. OmegaRx delivers all of the benefits of Zone Labs’ ultra-refined omega-3 concentrates.
Advantages
- Delivers clinically proven health benefits from the omega-3 fatty acids EPA and DHA*
- Promotes a healthy heart, healthy brain, healthy immune system, healthy circulatory system, healthy joints, healthy moods, healthy triglyceride levels and a healthy pregnancy*
- Combats silent inflammation
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