Drinking Diet Soda Is Linked to Increased Stroke and Dementia Risk, Study Finds

It's time to cut down on those artificial sweeteners.

diet soda, stroke, dementia study

When given a choice between a or its artificially sweetened "diet" alternative, you would think it'd be smarter to reach for the "" option. After all, you've heard time and time again about all the on your body.

But what if we told you those artificial sweeteners might not be that great for you, either? According to new research published in the American Heart Association's (AHA) journal Stroke, the sweeteners used in and juices are linked to a higher risk of having a stroke or developing dementia.

In the , researchers asked more than 4,000 participants to answer questions about their eating and drinking habits three separate times over a seven-year period. Then, for the next 10 years, they continued to follow the participants and noted which of them had a stroke or .

Ultimately, the researchers found that participants who drank at least one artificially sweetened drink per day were nearly three times more likely to or develop dementia — even after adjusting for other factors, such as age, sex, caloric intake, and presence of the Alzheimer's risk gene apolipoprotein E.

But Drinks With Real Sugar Aren't Off the Hook

Before you dump your diet soda and switch back to the real sugary stuff, consider this: Another from the same group of researchers suggests that regularly sweetened beverages might pose similar problems.

In this second study, which was published in the Alzheimer's Association's journal Alzheimer's and Dementia, the researchers found that consuming one or more sugary drinks per day was linked to early markers of Alzheimer's disease, including lower brain volume and poorer performance on memory tests. Yikes.

So what's a thirsty person to do?

First, keep in mind that there are some limitations to both studies: The participants were overwhelmingly white, for example, and both were observational studies that found association, not causation. So more research is needed.

It's also worth noting that sipping on artificially sweetened drinks may still be a useful dietary modification for some people.

"We know that limiting added sugars is an important strategy to support good nutrition and healthy body weights, and until we know more, people should use artificially sweetened drinks cautiously," Rachel K. Johnson, PhD, past chair of the AHA's Nutrition Committee and professor of nutrition at the University of Vermont, said in a . "They may have a role for people with diabetes and in weight loss, but we encourage people to drink water, low-fat milk or other beverages without added sweeteners."

, nutrition director at the , has similar recommendations.

"For now, limit diet sodas when you can, and cut back as much as possible on sugary beverages," she says. "Regardless, your best option, no matter what, is to , seltzer, and unsweetened coffee and tea beverages (which are great sources of antioxidants!) as much as possible."

So put down that soda — diet or otherwise — won't you? (And maybe give a try instead!)

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