Randomized, single blinded crossover trial testing optimal interventions to adequately suppress myocardial glucose suppression. We will enroll up to 50 subjects in order to reach our target of 40 fully evaluable; 20 healthy volunteers and 20 patients with Type 2 diabetes mellitus. We will test whether dietary modification (ketogenic diet) or exogenous ketone administration will provide enhanced myocardial glucose suppression. This study design is multi-arm. ARM 1: Subjects will undergo FDG PET/CT after 1 day of dietary modification (ketogenic diet for at least 3 meals) and 12 hours of fasting prior to FDG injection. Then subjects will undergo FDG PET/CT after 3 day of dietary modification (ketogenic diet for at least 9 meals) and 12 hours of fasting prior to FDG injection. ARM 2: Subjects will undergo FDG PET/CT after 1 dose of ketone drink administration after 12 hours of fasting prior to FDG injection. The dosing of ketone drink administration (approximately 65 mL) will be weight based (714 mg/kg), which is crucial to replicating ketone levels between participants.22 The KE drink will be administered approximately 45 minutes prior to FDG injection as concentrations of ~3 mmol/L are reached within 60 minutes16 18 . By way of comparison, website marketing of the commercial drink recommends ingestion 30 minutes prior to athletic performance. We will also perform echocardiography immediately before and 30 minutes after the drink.

You may be eligible for this study if you meet the following criteria:

• Conditions: Medical Research
• Age: 99 years or below
• Gender: All