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NiagenPlus

Phase 1

Healthy Volunteer | Small molecule | Neurology |Niagen Bioscience, Inc.|Last Updated: Nov 26, 2025

Target and mechanism

Molecular targetNAD+
ModalitySmall molecule

Success Probability

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Market & Valuation

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Trial Design

RandomizedCONTROLLED
Total Trials1
Total Enrollment40

FDA Designations

ORPHAN_DRUGPRIORITY_REVIEW

Clinical trial landscape

NiagenPlus · 1 trial · 2 indications

Phase 1 1
NCT07251608Randomized, Open-label, Safety Study of Subcutaneous and Intramuscular Injections of Niagen® PlusHealthy Volunteer
RECRUITING40 Analytics
PHASE1RECRUITING
Randomized, Open-label, Safety Study of Subcutaneous and Intramuscular Injections of Niagen® Plus
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Study Endpoints

Primary Endpoints

Incidence and severity of adverse events
From Day 1 (first injection) through Day 100 (final visit)

The incidence and severity of treatment-associated moderate and severe adverse events (AEs) will be assessed.

Blood Pressure
Immediately before the first intervention, and through the 100th day of the study.

Blood pressure, systolic and diastolic, will be measured

Heart Rate
Immediately before the intervention and through the 100th day of the study (final visit).

Heart rate will be measured.

Pulse Rate
Immediately before and through the 100th day of the study (final visit).

Pulse rate will be measured.

Respiratory Rate
Immediately before and through the 100th day of the study (final visit).

Respiratory rate will be measured.

Blood Oxygen
Immediately before and through the 100th day of the study (final visit).

Blood oxygen level will be measured.

Complete Blood Count
Immediately before and through the 100th day of the study (final visit).

A complete blood count with differential will be evaluated through whole blood samples

Comprehensive Metabolic Panel
Immediately before and through the 100th day of the study (final visit).

Comprehensive metabolic panel will be evaluated through whole blood samples

Homocysteine
Immediately before and through the 100th day of the study (final visit).

Homocysteine will be measured from venous blood samples as part of the primary safety laboratory panel. Levels will be analyzed as absolute values and change-from-baseline to evaluate any clinically significant elevations or shifts associated with repeat dosing of Niagen®Plus.

High-Sensitivity C-Reactive Protein (hs-CRP)
Immediately before and through the 100th day of the study (final visit).

High-sensitivity C-reactive protein will be assessed from venous blood samples as part of the primary safety laboratory panel. hs-CRP is a sensitive biomarker of systemic inflammation and may signal acute or sub-acute inflammatory responses to repeated Niagen®Plus dosing. Levels will be analyzed as absolute values and change-from-baseline to identify any clinically meaningful elevations or trends. Data will be summarized descriptively by dose and route of administration to support safety evaluation.

Secondary Endpoints

Change in whole-blood NAD⁺ concentrations
Baseline (Day 1) through Day 100
Participant- and clinician-reported injection-site experience
Immediately post-injection through 180 minutes after dosing (Days 1-3)
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Study Design & Arms

AllocationRANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
50 mg Subcutaneous Niagen®PlusEXPERIMENTALParticipants receive 50 mg Niagen®Plus administered subcutaneously (under the skin) once daily for three consecutive days during in-clinic visits (Days 1-3). Participants then continue self-administered subcutaneous injections of the same dose three times per week (Monday, Wednesday, Friday) from Days 10-100.
100 mg Subcutaneous Niagen®PlusEXPERIMENTALParticipants receive 100 mg Niagen®Plus administered subcutaneously once daily for three consecutive days during in-clinic visits (Days 1-3). Participants then continue self-administered subcutaneous injections of the same dose three times per week (Monday, Wednesday, Friday) from Days 10-100.
50 mg Intramuscular Niagen®PlusEXPERIMENTALParticipants receive 50 mg Niagen®Plus administered intramuscularly (into the deltoid muscle) once daily for three consecutive days during in-clinic visits (Days 1-3). No further at-home injections are performed; participants return for follow-up visits on Days 10, 40, and 100.
100 mg Intramuscular Niagen®PlusEXPERIMENTALParticipants receive 100 mg Niagen®Plus administered intramuscularly (into the deltoid muscle) once daily for three consecutive days during in-clinic visits (Days 1-3). No further at-home injections are performed; participants return for follow-up visits on Days 10, 40, and 100.

Interventions

NameTypeDescription
Niagen®PlusDRUGPharmaceutical-grade nicotinamide riboside chloride (NRCl), compounded for sterility and reconstituted in bacteriostatic water for injection. Administered by subcutaneous or intramuscular injection at 50 mg or 100 mg per dose. Participants receive three clinician-administered injections during clinic visits on Days 1-3, followed by at-home subcutaneous self-administration three times per week (Monday, Wednesday, Friday) from Days 10-100, depending on study arm.
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersYes
Study Sites1

Inclusion Criteria: * Generally healthy adults, aged 18+ * Demonstrated baseline fatigue as determined by a below average score from the FAS (threshold prespecified in SAP). * NAD+ or NAD+ precursor injection naïve (including intravenous, intramuscular, subcutaneous, or other injection route) (i.e....

Countries:United States
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Frequently asked questions about NiagenPlus

What is NiagenPlus used for?

NiagenPlus is an investigational small molecule being studied in healthy volunteers for the potential treatment of fatigue. It is currently in Phase 1 clinical development and is not yet approved by the FDA. The drug is being evaluated for its safety when administered by subcutaneous and intramuscular injection.

What does NiagenPlus target?

NiagenPlus targets NAD+, a coenzyme involved in cellular energy metabolism. By modulating NAD+ levels, the drug is being investigated for its potential effects on fatigue. The mechanism is being studied in a Phase 1 clinical trial enrolling healthy volunteers.

Who makes NiagenPlus?

NiagenPlus is being developed by Niagen Bioscience, Inc., a company listed on the stock exchange under the ticker symbol NAGE. The company is conducting clinical research on this investigational drug candidate for fatigue in healthy volunteers.

What phase is NiagenPlus in?

NiagenPlus is in Phase 1 clinical development. It is an investigational drug that has not been approved by the FDA. The ongoing Phase 1 trial is a randomized, open-label, controlled safety study of subcutaneous and intramuscular injections of NiagenPlus.

What clinical trials is NiagenPlus in?

NiagenPlus is being studied in one active clinical trial, NCT07251608, titled 'Randomized, Open-label, Safety Study of Subcutaneous and Intramuscular Injections of Niagen® Plus'. This Phase 1 trial is recruiting 40 participants in the United States, with an age minimum of 18 years.