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Allulose: A Natural Sugar for Better Glycemic Control

One of the critical factors for the success of the Zone diet is improved glycemic control. This concept simply means that blood sugar levels are more stabilized from one meal to the next. The benefits are lack of hunger, better mental cognition, and reduction of inflammation.

For decades, the diabetic research community has known that fructose has been the ideal simple sugar for better glycemic control. The reason is that fructose has a glycemic index that is five times lower than glucose. Consequently, this means less glucose enters the blood, and the result is better hormonal control. Part of the reason is that much of the dietary fructose never reaches the blood because bacteria metabolize it in the gut. That’s why I have always used fructose as a primary carbohydrate in Zone bars and shakes. It just makes scientific sense.

Unfortunately, like politics, science is also prone to social media. In 2004, a short letter was written observing a correlation in the rise of obesity with the increase of high-fructose corn syrup (1). Keep in mind that high-fructose corn syrup is about 50 percent fructose and 50 percent glucose which is virtual identical to the composition of table sugar. Then came several popular diet books such as Fat Chance claiming our obesity epidemic is caused by fructose (2). One problem with that theory is that fruits are rich in fructose, and no one has ever advocated the stopping of fruit consumption. Another problem with that theory is that high-fructose corn syrup consumption peaked in 1999 and has declined by 40 percent since that time (3). Today the consumption of high-fructose corn syrup is below the level it was in 1990, and our obesity epidemic continues to increase.

Rather than cursing the darkness of quasi-scientific misinformation, the best policy is to embrace new science. Now an alternative sweetener has come to market that might have even better glycemic properties than fructose. That’s why I am excited about allulose. Allulose is a natural sugar found in low quantities in various fruits. What is unique about allulose is that 90 percent never enters the blood and thus goes directly to the colon to improve gut health. Consequently, the FDA doesn’t consider allulose to be a sugar because it is not absorbed, but the FDA also doesn’t treat it as a fiber. It's like a “phantom” carbohydrate. However, what it does do in the gut is to increase AMPK levels (4). One of the consequences of activating AMPK is that you live longer (5). Thus, allulose can be considered an “anti-aging “sugar.

Now that allulose can be produced in large amounts by biotechnology, it has been recently granted Generally Regarded as Safe (GRAS) status meaning it can be incorporated into food products. This opens up an entirely new potential for our next generation of Zone shakes and bars for enhanced glycemic control.

For example, with the replacement of fructose by allulose in our ZoneRx shakes (currently available in Chocolate and Vanilla), the decrease in total carbohydrates now allows for the addition of extra berries to each shake to achieve a truly Zone balance. The amount of berries we recommend for better glycemic control is based on science not guessing. I recommend adding two blocks of berries (strawberries, blueberries, raspberries, or blackberries). That is also about 1 cup or about 6 oz of berries. This amount adds even more polyphenols and fermentable fiber to the final ZoneRx shake while maintaining the Zone macronutrient balance needed for optimal hormonal control. Of course, it also makes a complete meal that tastes likes a gourmet dessert in seconds. For maximum convenience, just purchase frozen berries (they have a higher nutrient quality than fresh berries) and keep enough already thawed in the refrigerator to make about two Zone shakes.

As the leader in nutrition for the last 30 years, we are the first company to have shakes using allulose. Our ZoneRx bars containing allulose are under development and will be available shortly. The more science we can bring to your kitchen, the easier it becomes to retake control of your health by being in the Zone.

ZoneRx Chocolate and Vanilla Shakes Now Contain Allulose

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References

  1. Bray GA et al. “Consumption of high-fructose corn syrup in beverages may play a role in the epidemic of obesity.” Am J ClinNutr 79:537-43 (2004)
  2. Lustig RH. Fat Chance. Penguin Books. New York, NY (2012)
  3. USDA Economic Research Service. “Per capita sweetener deliveries show steady downturn largely due to reduced demand for high fructose corn syrup.” Sugar and Sweetners Data (2021)
  4. Shintani T et al. “d-Allulose, a stereoisomer of d-fructose, extends Caenorhabditis elegans lifespan through a dietary restriction mechanism: A new candidate dietary restriction mimetic.” Biochem Biophys Res Commun 493:1528-1533 (2017)
  1. Ingram DK and Roth GS. “Glycolytic inhibition: An effective strategy for developing calorie restriction mimetics.” Geroscience https://doi.org/10.1007/s11357-020-00298-7 (2020)            

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Dr. Sears Q&A: Weight Loss

With so much interest in weight loss and so much buzz around weight loss drugs, we put together some of the top questions we get in this latest Q&A blog. Here Dr. Sears answers your questions on weight loss, weight loss drugs and what he thinks is the most scientifically backed way to lose weight. See what he has to say.Question: What medical conditions could impede weight loss, and how can they be identified?  Answer:  Any condition associated with insulin resistance will make it difficult to lose weight.  This would include diabetes, heart disease, neurological disease, etc.  Also, any drug that induces insulin resistance will also make it difficult to lose weight.  These include corticosteroids and many neurological drugs. Question: How do hormones affect weight loss, and which imbalances are most detrimental? Answer: High levels of insulin (caused by insulin resistance), high levels of cortisol (caused by stress), and low levels of satiety hormones such as GLP-1 will make weight loss difficult. Question: Is there a connection between sleep quality and weight loss? Answer: Poor quality sleep increases cortisol levels that lead to insulin resistance. The higher your level of insulin resistance, the more difficult it is for any organ to remove glucose from the blood for transport into the cell, where it can be converted to energy. This i Question: Do any weight loss supplements work?  Answer: Not really. You have to restrict calories to activate AMPK which causes your body to effectively burn excess stored body fat.   Question: What medications are FDA approved for weight loss? Answer: There are number of approved older drugs, but the most widely used is still an old drug (Phentermine) that was only recently approved for long-term use. However, the new injectable GLP-1 receptor agonists are more powerful and more popular. The scientific name for the most well-known injectable weight-loss drug is semaglutide, which is marketed under the tradenames Ozempic and Wegovy. In simple terms, these injectable drugs activate the release of the hormone GLP-1 from the gut that goes directly to the brain to tell you to stop eating. These drugs were initially developed to treat type 2 diabetes, but the clinical studies in overweight and obese individuals demonstrated significant weight loss at higher levels. Question: What are the unintended side effects of weight loss medications (i.e. GLP-1s, dual GIP/GLP-1). Answer: One major problem is that the lack of hunger caused by the drug makes you less likely to consume sufficient protein to maintain lean body mass.  Lean body mass is defined as functional tissue such as organs (including the brain) and bone.  Nearly 40 percent of the weight loss in obese patients comes from loss of lean body mass.  Without adequate protein (especially on a diet that is calorie-restricted because of lack of hunger), the replacement of damaged cells is compromised.  The skin and hair are the first site to suffer.  This lack of protein also makes it difficult to maintain mitochondrial function that provides energy for each of your 30 trillion cells. As a result, fatigue (both mental and physical) is often experienced. Question: Would you recommend an injectable weight loss drug? Answer: The answer is no. There is a big difference between weight loss and fat loss. Weight loss is the combined loss of stored body fat and lean body mass (i.e., muscle). You want to lose fat but not muscle. Although the weight loss using weekly semaglutide injections is impressive according to the literature, a deeper look shows that about 40 percent of that weight loss is due to loss of lean body mass. That is not a good sign. It suggests that the injections reduce hunger to the extent that the person has little desire to eat enough protein to maintain muscle mass. In essence, the drug increases the patients' sarcopenia (muscle loss). One of the consequences of sarcopenia is increased frailty. Also once you stop using these weight loss drugs, the weight quickly returns. Question: Does a high protein diet help with weight loss? Answer: Most high protein diets are ketogenic diets that disrupt metabolism in addition to being high fat.  The appropriate diet is protein-adequate (about 30 grams of protein at each meal), carbohydrate-moderate (primarily non-starchy vegetables, low-fat (to reduce calories) and rich in fermentable fiber.  The common name for such a diet is the Zone diet. The ideal amount of protein at each meal for weight loss is about 30 grams. Less than 30 grams of protein at meal will not generate the hormonal signals from the gut to stop hunger. Too much protein at meal, greater than 30 grams, will inhibit AMPK activity which helps cells burn excess stored fat.  

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Aging: Can You Slow It Down?

The first few weeks of the New Year are often focused on the resolve to lose weight, when in actuality people should focus their goals on slowing down aging, no matter the time of year. The only regimen that clinically achieves results in slowing the aging process is calorie restriction without malnutrition. Why? It’s not simply losing weight but orchestrating the complex interplay of reducing senescent cells, reprograming your metabolism, and changing gene expression, leading to a longer and better life.   A Timeline of Calorie Restriction   The first recorded human experiments with calorie restriction began with the written books of Luigi Cornaro in the 16th century, as I outlined in my book The Anti-Aging Zone, published in 1999. However, the molecular mechanisms of why calorie restriction is so effective required more recent breakthroughs in metabolism and epigenetics that were confirmed with the CALERIE study that carefully controlled the diets of 225 participants over two years and then ongoing testing of their retained blood samples.     The results of the CALERIE study have been impressive. However, the one clear take-home lesson was that reduction of insulin resistance was the most predictive blood marker correlated with the genetic changes and the decrease in senescent cells that ultimately accelerate aging.   The Zone on Calorie Restriction   The Zone diet is a calorie-restricted diet that was patented to reduce insulin resistance. It requires balancing macronutrients at each meal to generate the rapid hormonal changes that give rise to satiety. Only then can you follow calorie restriction for a lifetime without hunger and fatigue. It starts with having enough protein at each meal to create satiety in the brain's appetite control center. You need about 30 grams of protein (no more, but no less) at each meal to generate the same hormonal responses induced by the recent injectable weight loss drugs. However, you also must balance that protein with an adequate level of low-glycemic carbohydrates (about 40 grams) to stabilize blood glucose levels, and then add a dash of monounsaturated fat (about 15 grams). Over the years, it has been demonstrated by more than 40 research publications that the Zone diet is superior to ketogenic diets and the Mediterranean diet under controlled clinical research.    A New Technology to Slow Down Aging  Unfortunately, many people think the Zone diet requires too much thinking.  That’s why I developed Zone Foods to overcome that problem. The first generation of Zone Foods demonstrated dramatic reductions in insulin resistance compared to a control group, getting an equal number of calories (1). The second generation of Zone Foods offers greater variety and even more appetite suppression without thinking. This second generation will include new and improved versions of the Zone Pasta and Zone Bars, with new additions of Zone Muffins, Zone Oatmeal, Zone Granola, Zone Soups, and Zone Cookies (coming soon!). Each Zone Food contains 15 grams of protein, balanced with the appropriate level of low-glycemic carbohydrates, so any combination of two Zone Foods will provide the critical 30 grams of protein at a meal to stop hunger and maintain peak mental awareness for the next five hours. The growing variety of Zone Foods makes following the Zone diet incredibly easy. If you are never hungry, that indicates that you are reducing insulin resistance. The long-term benefit to you is slowing aging, which is only possible with lifelong use of Metabolic Engineering that starts with the Zone diet as its foundation. You May Also Like: Reaching the Zone Using Metabolic Engineering

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