Absorption and Tolerability of Injectable Administration of Niagen®+, Nicotinamide Riboside Chloride, a Specialized Form of Vitamin B3, as Compared to NAD+: a Double Blinded, Randomized, Controlled Clinical Trial

Inclusion Criteria: * Provision of signed and dated informed consent form * Stated willingness and demonstrated ability to comply with all study procedures, as well as availability for the duration of the study * Lives within 100 miles of the NRI study site * Any gender, aged 40-65, inclusive * Good general health as evidenced by medical history * BMI 25-34.9 kg/m2 * Sedentary behavior (defined as \<20 minutes per day or 100 minutes per week of moderate to vigorous exercise) * Demonstrated fatigue (Fatigue Assessment Scale) defined as a below-average score * For females of reproductive potent…