Can an online game really improve blood sugar control for people with diabetes?

Robert H. Shmerling, MD

Senior Faculty Editor, Harvard Health Publishing

Follow me on Twitter @RobShmerling

When it comes to serious health problems, you might think a game would be unlikely to help. But a recent study of people with diabetes could change your mind.

Researchers publishing in the September 2017 issue of Diabetes Care describe a study in which people with diabetes joined a competitive online game aimed at educating participants about ways to improve blood sugar control. The results were encouraging.

How a game led to improved blood sugars

In this new research, 456 patients with poorly controlled diabetes were randomly assigned to one of two groups:

  • Group 1 participated in an online or phone-based educational game that asked two questions about managing diabetes each week for six months. Later, answers and explanations were provided. This group also received a booklet about civics, including questions about citizenship in the US.*
  • Group 2 received online or phone-based questions about civics each week for six months along with a booklet about diabetes self-management.*

(*The researchers wanted to have a control group that was just like the diabetes management game group, except instead of diabetes information they provided information on civics. Both groups got a civics lesson and diabetes information; the only difference was how that information was delivered. That way investigators could say with more confidence it was the game that improved blood sugars.)

Each participant was assigned to a team. Points were awarded for correct answers, and scores were posted so other participants could compare team and individual performance (with use of aliases to protect patient confidentiality). Members of the winning teams were rewarded with $100 gift certificates. In addition, the individuals whose scores were in the top 30% also received a $100 gift certificate.

At the end of the six-month competition, blood sugar control for those in Group 1 was better than for those in Group 2. The improvement was even greater 12 months after the game began. In fact, the improvement observed in Group 1 patients with the worst blood sugar control was similar to that found in studies of diabetes patients starting a new medication to lower blood sugar.

Why is this important?

Keeping blood sugar close to normal is an essential part of diabetes care because it can prevent serious complications such as nerve damage, vision loss, and kidney failure. While a number of medications (including oral drugs and insulin injections) are available to lower blood sugar, non-medication options, including loss of excess weight and changes in diet, can be highly effective, cause fewer side effects than medications, and may come with health benefits beyond blood sugar control.

Although previous studies had been inconclusive, this new research strongly suggests that participation in an online game can lead to meaningful improvement in blood sugar control among people with diabetes.

Interpret with caution

Despite the encouraging findings of this study, it’s important to recognize some of its limitations, including:

  • Nearly all of the participants were male; results could be different if more women were included.
  • In order to enroll, all study subjects had to have access to the internet and email, so the results may not apply to those less proficient with these technologies.
  • The 456 people with diabetes who completed the study represented less than 3% of those considered potentially eligible to enroll. Therefore, the response of this group to the online game may not reflect the general population of people with diabetes.
  • It’s not clear whether the improvement in blood sugar following the six-month competition would continue beyond 12 months.
  • It’s uncertain whether the online game would have been as successful without the monetary prizes. In the “real world” such incentives are not generally available.

What’s next?

I think we are at the very beginning of realizing the potential of online and phone-based technologies to improve health. Diabetes is only one of many chronic diseases that could be better treated with patient engagement, motivation, and self-management. It no longer seems far-fetched to believe that innovative application of these technologies will prove beneficial to health, quality of life, and even longevity.


  1. Robert A Webster

    This seems very strange. I cant understand how people lowered their blood sugar whilst playing online games.
    You are sitting down while playing games and surely diet and exercise are the most important ways of controlling blood sugar,
    I am the same as Sara above and had difficulty controlling blood sugar, and I was on a high metformin doses and other medication. I disovered and took organic Moringa. My blood glcuose levels dropped almost immediately and I felt a lot healthier which motivated me to do exercise. My hb1 alc has been good for 5 years now and metformin now only a low dose. It will be interesting to learn more about this survey

  2. sara

    I was diagnosed with type 2 Diabetes and put on Metformin on June 26th, 2016. I started the ADA diet and followed it 100% for a few weeks and could not get my blood sugar to go below 140. Finally i began to panic and called my doctor, he told me to get used to it. He said I would be on metformin my whole life and eventually insulin. At that point i knew something wasn’t right and began to do a lot of research. Then I found Lisa’s diabetes story (google ” Lisa diabetes ” ) I read that article from end to end because everything the writer was saying made absolute sense. I started the diet that day and the next morning my blood sugar was down to 100 and now i have a fasting blood sugar between Mid 70’s and the 80’s. My doctor took me off the metformin after just three week of being on this lifestyle change. I have lost over 30 pounds and 6+ inches around my waist in a month. The truth is we can get off the drugs and help myself by trying natural methods

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