Visualizing Vascular Mechanisms of Salt Sensitivity

Inclusion Criteria: * Identification as black race * Age between 18 and 55 years * Body mass index between 25 and \<35 kg/m2 * Normotensive or pre-hypertensive * Willing to adhere to study diets * Able to provide informed consent and communicate with study personnel Exclusion Criteria: * Prevalent cardiovascular disease or use of medications for cardiovascular disease * Current or prior history of hypertension or use of blood pressure lowering medications * Current or prior history of diabetes mellitus or use of anti-diabetic medications * Prevalent renal disease (eGFR \< 60 ml/min/1.73m2), abnormal serum sodium or potassium * Current or prior smoker * Current pregnancy, or use of hormone replacement therapy or oral contraceptive * Current steroid use * Contraindications to MRI * Active infection or open wounds on the top of the feet or hands