Open-label Study to Assess Increasing Levels of NAD+(Nicotinamide Adenine Dinucleotide)

Inclusion Criteria: * Able to provide written Informed Consent * Able to follow verbal and written study directions in English * Adult men and women between age 30-80 years (inclusive) * Women of reproductive potential will practice contraception during the Investigation * Body Mass Index (BMI) between 18.5 and 35 kg/m2 * Must not be taking or be willing to stop taking any supplements containing any form of niacin for seven days prior to baseline and for the duration of the study. * Must not be using or be willing to stop use of any "100%" or higher niacin fortified foods from seven days prior to screening visit and for the duration of the investigation * Able to maintain consistent diet and lifestyle habits throughout the study * Volunteers with chronic but stable and well controlled medical conditions (i.e., hypertension controlled by a consistent dose of medication for a minimum of six months; chronic use of consistent dose of blood-thinning medication; diet-controlled Type II diabetes) may participate at the discretion of the PI or Sub-I. * Willing and able to provide fasting blood samples * Able to attend scheduled visits at the Life Extension Clinical Research (LECR) facility Exclusion Criteria: * Current use of prescription or over-the-counter nicotinic acid * Use of statin drugs * Having used any tobacco product or used a recreational drug in the past 6 months * Medically complicated \[i.e., diabetes requiring insulin; uncontrolled hypertension (blood pressure readings at screening/baseline \> 140 systolic or \> 90 diastolic on two consecutive readings); etc.\] at the discretion of the PI or Sub-I * Having abnormal screening laboratory test values or other lab test result(s) that would preclude study participation in the judgment of the PI or Sub-I * Woman who is pregnant, nursing, or planning a pregnancy. Non-pregnant status of women of childbearing potential will be confirmed during each Day 3 Cycle LECR visit (Wednesday or Thursday) via serum pregnancy test. * Currently, or within the past 30 days, enrolled in a different clinical investigation * Inability to provide a venous blood sample * Unable to refrain from any alcohol consumption for the duration of the study * Unable or unwilling to provide written informed consent for participation in study