This trial involves participants drinking beverages sweetened with either erythritol or aspartame for a short period. The study focuses on people at high risk for heart problems. Researchers aim to see if erythritol causes changes in the blood that could lead to heart issues, compared to aspartame. Aspartame is a commonly used intense artificial sweetener, being approximately 200 times sweeter than sucrose. There have been concerns over aspartame since approval in the 1980s including a large anecdotal database reporting severe symptoms.