Regular consumption of artificially sweetened drinks such as diet sodas may increase risk of stroke and dementia, a new study shows. No connection was found between those health risks and other sugary beverages, such as sugar-sweetened sodas and fruit juice, and the study only shows an association and cannot prove cause and effect. Overall diet and lifestyle, rather than any one ingredient or food, are more closely linked to heart disease and diabetes risk, and we know that heart disease and diabetes are linked to an increased risk of dementia.