This is a research study. The investigators are inviting participants to participate in this research study between the ages of 18-45, who have stable Relapsing-Remitting Multiple Sclerosis (RRMS), are able to walk 25 ft with/without an assistive device, and have none of the following: liver disease, kidney disease, diabetes, active heart disease, heart block or arrhythmias, bleeding disorders, concurrent diuretic use, anti-coagulation or anti-platelet use, psychosis or other psychiatric disorder likely to impact ability to comply with study procedures, any change in prescription medication for a mental health problem such as depression or anxiety in the last three months.