Sugar-free foods and drinks are lower in calories than their full sugar alternatives, but are they good options for weight loss? While sugar substitutes are generally safe, the debate about how they should be used continues.
Sugar Substitutes: A Short and Sweet History
The first sugar substitute, saccharin, was discovered in the late 1800s and gained prominence in manufacturing during the World Wars, when sugar was rationed. The business of sugar-free foods and drinks began to boom in the 1960s when clinicians realized the importance of controlling weight gain in the management of diabetes.
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Since then, as people became more health-conscious and wanted to shun sugar, manufacturers responded with a host of sugar substitutes. They are:
  • Aspartame, approved in 1981 by the U.S. Food and Drug Administration (FDA) and now in more than 6,000 foods and drinks
  • Acesulfame-K, FDA-approved in 1988
  • Sucralose (Splenda, SucraPlus), approved in 1998 for limited use and in 1999 for general use
  • Neotame, approved in 2002
Other sugar substitutes are being developed, and many products contain a mix of sugar substitutes to enhance flavor. Each sugar substitute is several thousand times sweeter than sugar, but has a slightly different flavor. Whether you reach for the pink, blue, or yellow packet to sweeten your coffee is a matter of personal taste. Sugar substitutes are now so common that many people use them without consciously considering their use as a weight-loss strategy.
Sugar Substitutes: Their Role in Your Diet
As part of an overall healthy diet, sugar substitutes are believed to reduce calories and the risk of cavities. Interestingly, controlled studies that compare weight loss between people who use sugar substitutes and those who consume sugar show very little difference in weight loss between the two groups, although over the long term, sugar substitutes can help maintain weight loss.
Conscious calorie-cutting strategies can include sugar-free products. Replacing a sugary drink with a sugar-free drink will reduce your calorie intake, and cutting back by just one full sugar soda a day could result in losing over 1.4 pounds in 18 months. The key to losing weight using sugar-free products is to use them strategically.
Sugar Substitutes: How Much Can You Have?
A big question surrounding sugar substitutes is how much diet soda is safe to drink. Though you might never consider consuming this much in a day, the FDA says these are the maximum amounts allowable for daily consumption, listed by type of sugar substitute:
  • Aspartame: 18 to 19 cans of diet soda
  • Saccharin: 9 to 12 packets
  • Acesulfame-K: 30 to 32 cans of diet soda
  • Sucralose: 6 cans of diet soda
Sugar Substitutes: Reality Check
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A realistic use of sugar-free products looks quite different.
A regular amount for a sugar substitute is two servings a day, says dietitian Liz Weinandy, RD, MPH, a dietitian in the non-surgical weight-loss program at Ohio State University Medical Center in Columbus. “My concern comes when people do multiple servings, like a six-pack of diet pop a day. Many times they are trying to use a sugar substitute in place of food. Some are very nutritious, like light yogurt, but while sugar-free soda doesn’t have calories, it also doesn’t have stuff in it that’s good for you.”
Further, consuming a lot of sugar-free drinks could hurt your weight-loss strategy. Studies show that when a sugar substitute is added to a product that has no other nutritional content (such as water), it increases hunger. This is true regardless of the type of sugar substitute used. Sugar substitutes in foods do not have this effect.
Sugar Substitutes: Who Should Avoid Them
While sugar substitutes are generally considered safe, Weinandy advises against giving children sugar-free foods and drinks — unless a doctor has said otherwise — and says pregnant women also should be cautious. “Drink water or fruit juice during pregnancy,” Weinandy suggests. “Limit diet pop to one per day at most.”
Additionally, people who have the disease phenylketonuria need to avoid aspartame, which contains phenylalanine, one of the amino acids in protein. Phenylketonuria is a genetic disorder in which the body cannot fully break down phenylalanine. If levels of it get too high in the blood, mental retardation could result.
For most people, sugar substitutes are a safe alternative to sugar. They may be helpful, in reasonable amounts, with weight loss and weight managementwhen they are part of a balanced, healthy diet.