The Effects of Nicotinamide Adenine Dinucleotide (NAD) on Brain Function and Cognition (NAD)
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ClinicalTrials.gov Identifier: NCT02942888 |
Recruitment Status :
Completed
First Posted : October 24, 2016
Last Update Posted : September 2, 2021
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Condition or disease | Intervention/treatment | Phase |
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Mild Cognitive Impairment NAD | Dietary Supplement: Nicotinamide riboside Dietary Supplement: Sugar Pill | Not Applicable |
Niagen is a patented formula which is the first and only commercially available form of Nicotinamide Riboside (NR). It has been proven in basic science studies as a highly effective NAD booster, but it also works as a vitamin B3 supplement. NAD helps pass energy from glucose to other pathways in the cell. Niagen (Nicotinamide Riboside, vitamin B3) is one of the most effective NAD+ precursors to support cellular health.
The purpose of this study is to determine the effects of Niagen (nicotinamide riboside, vitamin B3), on NAD levels, brain function including cognition and blood flow in people diagnosed with mild cognitive impairment (MCI).
Study Type : | Interventional (Clinical Trial) |
Actual Enrollment : | 46 participants |
Allocation: | Randomized |
Intervention Model: | Factorial Assignment |
Masking: | Triple (Participant, Care Provider, Investigator) |
Primary Purpose: | Basic Science |
Official Title: | The Effects of NAD on Brain Function and Cognition |
Actual Study Start Date : | November 30, 2017 |
Actual Primary Completion Date : | August 31, 2019 |
Actual Study Completion Date : | August 16, 2021 |

Arm | Intervention/treatment |
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Active Comparator: Healthy control
Oral administration of NAD precursor, nicotinamide riboside (Niagen; Chromadex Inc.) Dosing will consist of 250mg (week 1), 500mg (week 2), 750mg (week 3), 1g (weeks 4-10). Controls will receive sugar pills.
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Dietary Supplement: Nicotinamide riboside
Oral administration of Niagen ramp up 250mg to 1g/day as tolerated
Other Name: Niagen; ChromaDex, Inc. Dietary Supplement: Sugar Pill This is a placebo compounded by ChromaDex, Inc. |
Experimental: MCI
Oral administration of NAD precursor, nicotinamide riboside (Niagen; Chromadex Inc.) Dosing will consist of 250mg (week 1), 500mg (week 2), 750mg (week 3), 1g (weeks 4-10).Controls will receive sugar pills.
|
Dietary Supplement: Nicotinamide riboside
Oral administration of Niagen ramp up 250mg to 1g/day as tolerated
Other Name: Niagen; ChromaDex, Inc. Dietary Supplement: Sugar Pill This is a placebo compounded by ChromaDex, Inc. |
- Change in Cognitive Assessment - Montreal Cognitive Assessment (MoCA) - from baseline at 10 weeks [ Time Frame: 10 weeks ]MoCA Value
- Change in cerebral blood flow from baseline at 10 weeks [ Time Frame: 10 weeks ]functional Magnetic Resonance Imaging (fMRI)
- Change in plasma NAD from baseline at 10 weeks [ Time Frame: 10 weeks ]Plasma NAD level
- Change in Physical Performance - Short Physical Performance Battery (SPPB) - from baseline at 10 weeks [ Time Frame: 10 weeks ]SPPB Score
- Change in Physical Performance - Instrumental Activities of Daily Living (IADLs) - from baseline at 10 weeks [ Time Frame: 10 weeks ]IADL Score
- Change in endothelial function from baseline at 10 weeks [ Time Frame: 10 weeks ]Arterial Pressure
- Change in Cognitive Assessment - Geriatric Depression Scale (GDS) - from baseline at 10 weeks [ Time Frame: 10 weeks ]GDS Value (>/= 5 is abnormal)
- Change in Cognitive Assessment - Geriatric Anxiety Scale (GAS) - from baseline at 10 weeks [ Time Frame: 10 weeks ]GAS Value (Raw score 1 -30)
- Change in Cognitive Assessment - Clock Drawing Task Protocol (CLOX) - from baseline at 10 weeks [ Time Frame: 10 weeks ]CLOX Value (Score 0-15)
- Change in Cognitive Assessment - Executive Interview (EXIT) - from baseline at 10 weeks [ Time Frame: 10 weeks ]EXIT Value (Score 0-50)
- Change in Cognitive Assessment - Test of Auditory Processing Skills (TAPS) - from baseline at 10 weeks [ Time Frame: 10 weeks ]TAPS Score
- Change in Physical Performance - Grip Strength - from baseline at 10 weeks [ Time Frame: 10 weeks ]Grip Strength (kgs)

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Ages Eligible for Study: | 65 Years and older (Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | Yes |
Inclusion Criteria:
- Previously diagnosed with MCI based on inclusion criteria of Texas Alzheimer's Research Care and Consortium (TARCC) study (IRB: HSC20090535H). We are enrolling both genders, all races and ethnic groups.
- Two week washout period for participants who were taking opioids or a dose of niacin over 200mg
Exclusion Criteria:
- Previously considered as healthy individuals without a MCI or Alzheimer's disease diagnosis based on exclusion criteria of the TARCC study (IRB: HSC20090535H).
- Neurological, psychiatric or active systemic medical disease
- Diabetes
- Moderate or severe depression and/or anxiety as determined the Geriatric Depression Scale (GDS) and the Geriatric Anxiety Scale (GAS), respectively
- Diagnosis of dementia
- Hearing, vision, motor or language deficits
- Alcohol or drug abuse
- Implantation of metal devices
- Administration of Alzheimer's drugs, anticholinergics, neuroleptics, anticonvulsants, opiates, systemic steroids, and mood-stabilizers.
- No opioid use while participating in study

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT02942888
United States, Texas | |
South Texas Veterans Healthcare System (STVHCS) | |
San Antonio, Texas, United States, 78229 | |
University of Texas Health San Antonio | |
San Antonio, Texas, United States, 78229 |
Principal Investigator: | Becky Powers, M.D. | University of Texas Health Science Center in San Antonio |
Responsible Party: | The University of Texas Health Science Center at San Antonio |
ClinicalTrials.gov Identifier: | NCT02942888 |
Other Study ID Numbers: |
HSC20160350H |
First Posted: | October 24, 2016 Key Record Dates |
Last Update Posted: | September 2, 2021 |
Last Verified: | August 2021 |
Individual Participant Data (IPD) Sharing Statement: | |
Plan to Share IPD: | No |
Studies a U.S. FDA-regulated Drug Product: | No |
Studies a U.S. FDA-regulated Device Product: | No |
Product Manufactured in and Exported from the U.S.: | No |
Mild Cognitive Impairment MCI NAD nicotinamide riboside aging |
Cognitive Dysfunction Cognition Disorders Neurocognitive Disorders Mental Disorders Niacinamide Niacin Nicotinic Acids Vitamin B Complex |
Vitamins Micronutrients Physiological Effects of Drugs Hypolipidemic Agents Antimetabolites Molecular Mechanisms of Pharmacological Action Lipid Regulating Agents Vasodilator Agents |