Dr. L. W. McDaniel and Jamie Welter ask the following questions related to artificial sweeteners.
Artificial sweeteners provide lower caloric intake than sugar in various types of foods and fluids. However, there has been controversy surrounding these too- good-to-be-true sweeteners. "The idea of a genuinely toothsome sensation that isn't "paid for" in calories and weight gain seems too much like the proverbial free lunch" (Szalavitz 2006). Artificial sweeteners have been found to increase body weight when compared to high-sucrose foods. The rationale behind this observation was that sweeteners may actually increase cravings for foods that contain real sugar. Questions have been raised related to how these artificial sweeteners affect the brain to produce the association between sweetness and the urge to increase cravings for sweet calories. Other research trials have shown that diets with artificial sweeteners may assist subjects in the process of losing weight. (Szalavitz 2006)
Do artificial sweeteners have the ability to prevent weight loss?
Obesity has continued to rise in the age of artificial sweeteners; some studies found short-term increases in sugar craving to sweeteners, while others found no connection. People who use artificial sweeteners tend to be heavier than those who do not renounce sugar, but this may occur because of the greater number of overweight people who consume sugar substitutes to control their weight. Normally the brain identifies sweetness with calories, which is not achieved with artificial sweeteners. For example, when a group of rats drank artificially sweetened fluid the rats began to miss the sweetness calorie connection. The rats consumed more of a sugary and fattening snack than those rats who had been enjoying sweet high calorie drinks. Research suggests that artificial sweeteners may cause the same effect on people, however, that possibility has not been strongly supported.
A study consisted of a group of overweight people who drank beverages sweetened with sugar and a second group of overweight people that drank beverages with a sugar substitute. Both groups consumed the same quantity of liquid. Those who drank the sugar liquid gained 3.5 pounds versus a two-pound weight loss for those who drank the artificially sweetened beverages. Sweeteners may not cause the same results on people because sugar substitutes tend to be consumed by ingesting low or no calorie drinks accompanied with high calorie meals. This combination may satisfy the sugar calorie connection in their brains.
David Levitsky added, "Unquestionably, artificial sweeteners work. In experimental studies, when calories were actually measured by what people ate with and without sweeteners, total caloric intake goes down with sweeteners" (Szalavitz 2006). But Levitsky cautioned that sweeteners need to be substituted for higher calorie foods and drinks to make a difference, as opposed to simply adding them on to the calories that have been consumed. If used properly, sweeteners may be useful in weight management. Research have been performed that included two overweight groups that agreed to supplement their meals with sucrose or artificial sweeteners for 10 weeks. Those with sucrose gained 1.5 kg; the group who consumed artificial sweeteners lost 1.0 kg. These findings contradicted the idea that the consumption of artificial sweetener leads to over consumption of carbohydrate foods, leading to weight gain. Additional studies with similar results have been published. (Szalavitz 2006)
May the use of artificial sweeteners produce possible side effects?
In reference to the safety aspects related to the consumption of artificial sweeteners aspartame was found to be multi-potent carcinogenic agent when feed to rats. These studies confirmed that aspartame was a carcinogenic agent. Researchers demonstrated that carcinogenic effects are increased when there is life-span exposure to aspartame beginning during fetal life.
A case study on aspartame found that it has the potential to trigger migraine headaches. The study found that in two patients the acute agent containing aspartame worsened rather than relieved their migraines. Another case study, by Dr's. Bigal and Krymchantowski, found that Splenda, containing sucralose, may also induce migraines. (Bigal et al. 2007)
The list of artificial sweeteners to be avoided consisted of Sucralose, Acesulfame-K, Aspartame, Alitame, and Cyclamate. Two sweeteners that are the most used and popular were Sucralose and Aspartame. Sucralose is known as SPLENDA. SPLENDA has been acknowledged for its inability to be metabolized by the body. Since it is not digested, Splenda does not increase calories, raise blood sugar, or leave an aftertaste. Testing of sucralose has revealed organ, genetic, and reproductive damage. Other side effects may entail shrinkage of the thymus gland, swelling of the liver and kidneys, and initiate calcification of the kidney; but the FDA determined that it does not increase cancer risk in humans. (Bigal et al. 2007, Hirsch 2007, Hull 2005, Newman et al. 2001 and Rebhahn 2001)
Aspartame, known as NutraSweet and Equal, is intensely sweet and is digested like protein, but the calories are negligible since only a small amount is needed due to its intensely sweet taste. Aspartame has no aftertaste. Aspartame has been identified as a dangerous chemical food additive. The use of this sweetener during pregnancy and by children has been contraindicated. Menthanol, part of aspartame's blueprint, is a known carcinogen that causes retinal damage in the eye, interferes with DNA replication, and causes birth defects. One of the most deadly reactions to aspartame is by phenylketonurics (PKU). Toxic levels of this substance (PKU) in the blood stream may result in mental retardation. Scientists believe aspartame alters brain function and prompts behaviour changes in humans. The over consumption of PKU in one's diet may cause seizures, elevated blood plasma, and negative effects during pregnancy, increased PMS symptoms, insomnia, and severe mood swings. (Hull 2005)
What are some of the differences between varieties of artificial sweeteners?
Many people assume that all artificial sweeteners are similar and have the same properties. A section of this study was prepared to discuss those differences. Not all artificial sweeteners are produced using the same ingredients. Some sweeteners are composed of a mixture of unnatural chemicals that the body has difficulty processing. Basically, these chemicals accumulate in vital organs, pollute bloodstream, or cause mutations of human cells. One method to determine which sugar packet may be safely consumed is to look at the colour of the paper container. When shopping think of Splenda, the yellow packet, as caution. The blue packet, Equal, makes you feel blue. Sweet'N'Low®, or generic saccharin, the pink packet: you're in the pink! Sweet'N'Low® has been the most recommend sweetener for human use. (Rubin 2003) Alternatives to consider include safe natural sweeteners such as stevia, honey, sorghum, barley malt, and molasses
Studies were uncertain as to whether artificial sweeteners were contributors to weight gain. However, research findings have indicated that diet drinks may cause some individuals to overeat. Water has been a great substitute for sweetened or artificial sweeteners. When deciding which sweeteners to be consumed use Sweet'N'Low®, or generic saccharin. Avoid or reduce the consumption of Aspartame, Nutra-Sweet, and Equal.
Health and safety studies indicate that it is important to pay attention to the amount of artificial sweeteners an individual consumes in their diet daily. An additional consideration would be the potential for the development of migraine head aches or cancer in years to come. Be cautious of the effects that these substances may have on your body.
The American Dietetic Association (ADA) published a comprehensive report on sugar and artificial sweeteners affirming that artificial sweeteners are safe when used in the amounts specified by the FDA. One does not have to eliminate artificial sweeteners from your diet, but it is important to be cautious when using sweeteners. These products should be used in moderation. (Hull 2005 and Newman et al. 2001)
The Food and Drug Administration (FDA) has approved five low-calorie sweeteners for use in a variety of foods. The FDA has established an "acceptable daily intake" (ADI) for each sweetener. This is the maximum amount considered safe to consume each day over a lifetime. ADIs are intended to be about 100 times less than the smallest amount that might cause health concerns.
*FDA-established acceptable daily intake (ADI) limit per kilogram (2.2 pounds) of body weight
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About the Authors
Dr. Larry McDaniel is an associate professor and advisor for the Exercise Science program at Dakota State University, Madison SD USA. He is a former All - American in football and Hall of Fame athlete & coach. Jamie Welter is a student in Exercise Science at Dakota State University.
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