Assessment of Changes in Renal Cortical and Medullary Blood Flow by Contrast Ultrasound

Inclusion Criteria:

• Healthy adults
• Males and females
• Ages 18-65 years old

Exclusion Criteria:

• Pregnancy or lactation
• H/o kidney disease
• H/o congestive heart failure, ischemic heart disease, severe pulmonary disease or allergy to the drug
• H/o any cardiovascular disease
• Abnormal liver function (liver function tests out of specified ranges)
• Screening urinalysis which indicates infection or inflammation
• Taking regular medications (except for over-the-counter vitamins or hormonal contraceptives.)
• Taking supplements, like protein shakes
• Unwilling or unable to eat chicken (used as protein meal)