Research analyzing nearly 13,000 adults over eight years found that higher consumption of widely used low- and no-calorie sweeteners corresponds with a quicker decline in memory and thinking skills. The effect is particularly pronounced among younger adults and individuals with diabetes.
- Higher intake of six common sweeteners tied to faster memory and thinking decline
- Effect strongest in adults under 60 and people with diabetes
- No direct cause proven—more research needed
What happened
A long-term study tracked 12,772 adults in Brazil, averaging 52 years old, to observe the link between sugar substitute intake and brain health. Researchers focused on seven popular sweeteners found in many processed foods and drinks, including aspartame and sorbitol. Participants were grouped by low, medium, or high consumption levels and underwent multiple cognitive tests over eight years.
The results showed that those who consumed the highest amounts of certain sweeteners experienced a cognitive decline 62% faster than those in the lowest consumption group. This rate of decline was comparable to accelerating brain aging by approximately 1.6 years. The study highlighted particular risks for people with diabetes and adults younger than 60, who showed more pronounced reductions in memory, verbal fluency, and processing speed.
Why it feels good
Understanding how everyday food choices affect brain health can empower people to make informed decisions. This research shines a light on a common but often overlooked factor in cognitive aging, encouraging a more mindful approach to sweetener use, especially for those managing conditions like diabetes.
Although the findings do not prove these sweeteners directly cause cognitive decline, they open doors to further investigation and greater awareness. This knowledge could lead to healthier dietary guidance and innovation in alternatives that support long-term brain vitality.
What to enjoy or watch next
For those who enjoy products with artificial sweeteners, moderating intake may be a prudent step while new studies continue to explore these effects. Exploring natural sweetening options or gradually reducing reliance on sweetened drinks and snacks might benefit overall wellbeing.
Keep an eye out for upcoming research that clarifies how different sweeteners impact brain aging. Meanwhile, focusing on balanced nutrition, regular mental exercises, and managing health conditions remain the best ways to support cognitive function as we age.