Skip to main content
Got a question about a health story in the news or a health topic? Here's your chance to get an answer. Send us your questions about general health topics, diet and fitness and mental health. If your question is chosen, it could be featured on's health page with an answer from one of our health experts, or by a participant in the CNNhealth community.

* CNN encourages you to contribute a question. By submitting a question, you agree to the following terms found below.
You may not post any unlawful, threatening, libelous, defamatory, obscene, pornographic or other material that would violate the law. By submitting your question, you hereby give CNN the right, but not the obligation, to post, air, edit, exhibit, telecast, cablecast, webcast, re-use, publish, reproduce, use, license, print, distribute or otherwise use your questions(s) and accompanying personal identifying and other information you provide via all forms of media now known or hereafter devised, worldwide, in perpetuity. CNN Privacy Statment.
Thank you for your question!

It will be reviewed and considered for posting on Questions and comments are moderated by CNN and will not appear until after they have been reviewed and approved. Unfortunately, because of the voume of questions we receive, not all can be posted.

Submit another question or Go back to

Read answers from our experts: Living Well | Diet & Fitness | Mental Health | Conditions
CNN Medical Unit: Daily Dose (What's this?)
Get the reporting, research and analysis behind on-air stories straight from the CNN Medical Unit, led by chief medical correspondent Dr. Sanjay Gupta.

Sugar substitutes may make weight loss tougher

    • Study: Rats gained more weight after eating yogurt with saccharin than with sugar
    • Natural sugars, fibers and fats in food make us feel full and satisfied
    • Researchers believe artificial sweeteners do not produce the same fullness
  • Bottom Line: Sugar substitutes are still a useful diet tool, but it's important to count calories
Decrease font Decrease font
Enlarge font Enlarge font
No-calorie sweeteners may actually make it harder for people to control their intake and body weight than sugar.

No-calorie sweeteners may actually make it harder for people to control their intake and body weight than sugar.


A February 2008 laboratory study from the American Psychological Association says the widespread use of no-calorie sweeteners may actually make it harder for people to control their intake and body weight. Here are tips on the healthiest ways to get that sugar fix without packing on the pounds.

Question and answers

How was this study done?

Elizabeth Cohen, CNN medical correspondent: This was a laboratory study in which they tested two groups of rats. They fed one group yogurt that contained glucose, or regular sugar. The second group ate yogurt that contained the artificial sweetener saccharin, which is what is found in Sweet'N Low. The rats that ate artificially sweetened yogurt consumed more calories and gained more weight.

The researchers say they believe they'd get the same results with other artificial sweeteners such as aspartame, sucralose and acesulfame K.

What do artificial sweetener companies say about this?

We called Sweet'N Low to get their thoughts on these findings, and here is what they had to say:

Sweet'N Low response from Marvin Eisenstadt of the Cumberland Packing Corp.: "Just because a rat eats something doesn't mean it is going to happen to people. It is complete nonsense. ... They should take that money used for this waste-of-time study and help the poor or find a cure for cancer."

Why would the rats that ate fake sugar be fatter than the ones that ate real sugar? We asked someone from American Dietetic Association that, and this is the way they put it: Your body wants sugar, so when you eat something that's sweet but has no sugar, your body gets confused. It wants that sugar kick and will crave it until it gets it. That is why the rats on saccharine kept eating and eating. They were never satisfied.


Should people stay away from sugar substitutes?

No, we are not saying that. Some people say these artificial sweeteners help them lose weight. And they're the obvious choices for diabetics. But be realistic. These sugar substitutes have been around for decades, and they aren't solving the obesity problem in America. While they can be a useful diet tool, it's important to count calories.

You'd be better off eating one real chocolate bar. It's a matter of satisfaction. Natural sugars and fibers and fats in foods are what make someone feel full and satisfied.

For more information, go to these Web sites

American Psychological Association news release on the study

FDA addresses artificial sweeteners

  • E-mail
  • Save
  • Print

The information contained on this page does not and is not intended to convey medical advice. CNN is not responsible for any actions or inaction on your part based on the information that is presented here. Please consult a physician or medical professional for personal medical advice or treatment.