Ketone Esters for Appetite, Cognition, and Cardiovascular Function in Individuals With Obesity and Insulin Resistance

The goal of this single-blind randomized placebo-controlled trial is to test the effects of an oral ketone supplement on appetite, cognition, metabolism, and cardiovascular function in individuals with obesity and insulin resistance. The main question\[s\] it aims to answer are: * Does taking the ketone supplement reduce appetite and improve cognition? * How does the ketone supplement alter metabolism and cardiovascular function? Participants will be asked to consume a randomly assigned ketone ester supplement or a placebo and testing will be done to see how the supplement affects the following compared to a placebo: * appetite, * cognition, * metabolism * cardiovascular function Researchers will compare individuals with obesity and insulin resistance to individuals with normal weight and no insulin resistance to see if the ketone supplement affects groups differently.