A Study of the Pharmacokinetics of Three Dosages of Niagen in Healthy Subjects

Inclusion Criteria: * Healthy Male or female age 30-55 years * BMI 18.5-29.9 kg/m2 * If female, subject is not of child bearing potential, OR Females of childbearing potential must agree to use a medically approved method of birth control and have a negative urine pregnancy test result. * Healthy as determined by laboratory results and medical history * Agrees to maintain current level of physical activity throughout the study * Agrees to avoid vitamins and St. John's Wort for 30 days prior to enrollment and during the study * Agrees to avoid nutritional yeast, whey proteins, energy drinks, dairy products, grapefruit and grapefruit juice and alcohol 7 days prior to enrollment and during study * Has given voluntary, written, informed consent to participate in the study Exclusion Criteria: * Women who are pregnant, breastfeeding, or planning to become pregnant during the course of the trial. * Use of natural health products (NHPs)/dietary supplements within 7 days prior to randomization and during the course of the study. * Use of vitamins or St. John's Wort in the last 30 days before the study enrollment, * Use of natural health products containing Nicotinamide riboside within 7 days prior to randomization and during the course of the study * Use of nutritional yeast, whey proteins, energy drinks, grapefruit and grapefruit juice, dairy products, alcohol for 7 days prior to the study * Subjects who are smokers * Subjects with blood pressure ≥140/90 * Use of blood pressure medications * Use of cholesterol lowering medications * Metabolic diseases or chronic diseases * Use of acute over the counter medication within 72 hours of test product dosing * Unstable medical conditions as determined by the Qualified Investigator * Immunocompromised individuals such as subjects that have undergone organ transplantation or subjects diagnosed with human immunodeficiency virus (HIV) * Clinically significant abnormal lab results at screening (e.g. AST and/or ALT \> 2 x ULN, and/or bilirubin \> 2 x ULN) will be assessed by the Medical Investigator * Subjects who have planned surgery during the course of the trial * History of or current diagnosis of any cancer (except for successfully treated basal cell carcinoma) diagnosed less than 5 years prior to screening. Subjects with cancer in full remission more than 5 years after diagnosis are acceptable * History of blood/bleeding disorders * Blood donation in the past 2 months * Alcohol abuse (\>2 standard alcoholic drinks per day) or drug abuse within the past 6 months * Participation in a clinical research trial within 30 days prior to randomization * Allergy or sensitivity to study supplement ingredients or to any food or beverage provided during the study * Individuals who are cognitively impaired and/or who are unable to give informed consent. * Any other condition which in the Investigator's opinion may adversely affect the subject's ability to complete the study or its measures or which may pose significant risk to the subject