Effects of Nicotinamide Riboside on Metabolism and Vascular Function

Inclusion Criteria: * Age 18 to 35 (young) and 60 to 75 (older) * Normo- or pre-hypertensive (blood pressure \<140/90 mmHg) * Non-smokers * Able to give informed consent and participate in all laboratory visits Exclusion Criteria: * Currently taking any medications that could interfere with cardiovascular or metabolic outcomes will be excluded from the study (e.g., beta-blockers) * Known metabolic (e.g. Type I or Type II diabetes, cardiovascular disease, etc.) or immunologic (e.g. HIV, cancer, autoimmune, etc.) diseases * Food allergies to egg, milk, soy or wheat * Women who are pregnant or planning to become pregnant during the course of the study, * Pacemaker or other implanted device * Unwilling to participate in the experimental protocol or blood draws will be excluded