supplementNot FDA-approvedOTC supplement
Nicotinamide Riboside (NR)Benefits, Dosage & Interactions
Also known as: niagen
Nicotinamide Riboside (NR), often referred to by its brand name Niagen, is a naturally occurring form of vitamin B3 (niacin) that serves as a precursor to nicotinamide adenine dinucleotide (NAD+). Research on Nicotinamide Riboside (NR) focuses on healthy aging, cognition and mood, and women's healthspan.
Researched by DoseRoutine R&D TeamReviewed for accuracy by Nicholas Alexander, RSELast updated
Evidence: Strong — 2 human randomized trials published.
Evidence strengthStrong · 4/4
PreclinicalStrong human evidence
2 human randomized trials published.
Plasma half-life
Not applicable
Typical timing
morning
Default unit
mg
What published protocols report
Ranges documented in the literature, shown for reference. DoseRoutine does not recommend an amount — your prescriber or the product label sets the dose.
Reported for Nicotinamide Riboside (NR) in the cited sources. Published ranges are not dosing advice.
Nicotinamide Riboside (NR) compared with similar compounds
| Attribute | NMN | Nicotinamide riboside | Resveratrol |
|---|---|---|---|
| Class | NAD+ precursor | NAD+ precursor | Stilbene polyphenol |
| Route | Oral | Oral | Oral |
| Half-life | Not established in humans | Not established in humans | ~1-3 hours (low bioavailability) |
| Evidence grade | Limited | Moderate | Limited |
| Oral stability | Orally active | Orally active | Orally active but poorly absorbed |
| Typical published cycle | 4-12 weeks in the published trials | 6 weeks to 6 months in the published trials | 4-52 weeks across trials |
| Main studied use | NAD+ levels and metabolic markers | NAD+ levels, vascular and metabolic endpoints | Metabolic and inflammatory markers |
References & evidence
Documents the Nicotinamide Riboside (NR) entry is written from. Each number matches an inline marker above.
- [1]Chronic nicotinamide riboside supplementation is well-tolerated and elevates NAD+ in healthy middle-aged and older adultsMartens CR, Denman BA, Mazzo MR, et al. · Nature Communications · 2018 · Peer-reviewed · PMID 29599478
- [2]Nicotinamide riboside for peripheral artery disease: the NICE randomized clinical trialMcDermott MM, Martens CR, Domanchuk KJ, et al. · Nature Communications · 2024 · Peer-reviewed · PMID 38871717
How to track Nicotinamide Riboside (NR) doses
Tracking Nicotinamide Riboside (NR) well takes four fields and a habit. Here is what to record so the log is still useful in three months.
- 1
Add the dose and unit
Log Nicotinamide Riboside (NR) with its dose in mg so totals stay comparable over time — including days when you split the dose or skip it.
- 2
Set the time of day and food rule
Typical timing is morning. Reminders fire at that time and can export to your calendar.
- 3
Check it against the rest of the stack
Run Nicotinamide Riboside (NR) through the interaction checker against everything else in the routine — supplements, peptides, hormones and prescriptions — before it becomes a daily habit.
- 4
Log adherence, not intentions
Mark each dose taken, skipped or delayed as it happens. Weeks of honest logs are what make an adherence rate or a trend line meaningful; retrospective guessing is not.
- 5
Review against outcomes
Review Nicotinamide Riboside (NR) alongside your logged metrics and any relevant blood work every few weeks before changing the dose, so the change is a response to data rather than to a good or bad day.
What to log each time
- Dose in mg
- Time of day
- Taken / skipped / delayed
- Any side effects or notable changes
References & Evidence
Sources on this page that document Nicotinamide Riboside (NR) dosing, timing and safety.
- [1]National Center for Biotechnology Information View source
Educational information only — not medical advice. Dose ranges vary by person, indication and prescriber.
What is Nicotinamide Riboside (NR) studied for?
What is Nicotinamide Riboside (NR)?Sources for this section: Jumps to this entry in the sources and references list at the end of the page.
Nicotinamide Riboside (NR), often referred to by its brand name Niagen, is a naturally occurring form of vitamin B3 (niacin) that serves as a precursor to nicotinamide adenine dinucleotide (NAD+). NAD+ is a coenzyme crucial for various fundamental biological processes, including energy metabolism, DNA repair, and cellular signaling. Unlike other forms of vitamin B3 such as nicotinic acid and nicotinamide, NR is thought to convert into NAD+ with distinct metabolic pathways. It is found in trace amounts in some foods, including milk and some yeasts, and is widely available as a dietary supplement. Interest in NR as a supplement stems from its capacity to elevate NAD+ levels within cells, which tend to decline with age. Research into NR's effects spans areas such as cellular energy, metabolic health, and the aging process (Examine.com, NIH ODS).
What does the research say about Nicotinamide Riboside (NR)?
Tap a section to expand.
Nicotinamide Riboside functions primarily by acting as a precursor to Nicotinamide Adenine Dinucleotide (NAD+). Upon ingestion, NR is absorbed and then phosphorylated by specific enzymes, primarily nicotinamide riboside kinase (NRK1 and NRK2), to form nicotinamide mononucleotide (NMN). NMN is subsequently converted into NAD+ by the enzyme NMN adenylyltransferase (NMNAT). This pathway is distinct from that used by other NAD+ precursors like nicotinamide and nicotinic acid. NAD+ itself is a vital coenzyme involved in hundreds of enzymatic reactions within the body. Key roles of NAD+ include acting as a hydride acceptor in catabolic pathways (e.g., glycolysis, fatty acid oxidation, citric acid cycle) to generate ATP, and serving as a substrate for NAD-dependent enzymes. These enzymes include sirtuins, which are involved in regulating gene expression, DNA repair, and metabolism, and poly(ADP-ribose) polymerases (PARPs), which are critical for DNA repair. By increasing cellular NAD+ levels, NR is hypothesized to support these fundamental cellular processes, potentially influencing energy production, cellular resilience, and responses to metabolic stress (PubChem, DrugBank).
Source for this section: Sources for How does Nicotinamide Riboside (NR) work?: Jumps to this entry in the sources and references list at the end of the page.
Research into the potential benefits of Nicotinamide Riboside (NR) largely focuses on its ability to increase NAD+ levels, which are understood to decline with age. Elevated NAD+ levels are hypothesized to support various aspects of cellular function and metabolic health. Studies, primarily in animal models and a growing number of human trials, investigate NR's effects on several key areas:
* **Cellular Energy Metabolism:** By increasing NAD+, NR may support mitochondrial function and energy production. NAD+ is a fundamental coenzyme in the electron transport chain, which is central to ATP generation. Some studies suggest NR supplementation could enhance metabolic efficiency at a cellular level (Cochrane, Examine.com).
* **DNA Repair:** NAD+ is a crucial substrate for poly(ADP-ribose) polymerases (PARPs), a family of enzymes involved in repairing DNA damage. Maintaining adequate NAD+ levels may support the body's natural DNA repair mechanisms, which are important for cellular integrity (NIH ODS).
* **Sirtuin Activation:** Sirtuins are a family of NAD+-dependent protein deacetylases that play roles in cellular regulation, including metabolism, stress resistance, and gene expression. By increasing NAD+ availability, NR is thought to indirectly activate sirtuins, potentially contributing to beneficial effects on metabolic health and cellular longevity (Examine.com, Mayo Clinic).
* **Metabolic Health Support:** Some human trials have explored NR's potential to influence markers of metabolic health, such as insulin sensitivity and lipid profiles, though results have been varied and require further extensive research. Early findings suggest a complex interaction with individual metabolic states (NIH ODS).
* **Neurological Function:** Preclinical studies have investigated NR's role in neuroprotection and cognitive function, theorizing that enhanced NAD+ levels could support neuronal health and resilience. Human data in this area is currently limited and exploratory (PubChem).
It is important to note that while initial findings are promising, many proposed benefits are still under investigation, and the long-term effects and full scope of NR's impact on human health are not yet fully understood.
The evidence supporting the effects of Nicotinamide Riboside (NR) primarly comes from preclinical studies (in vitro and animal models) and an increasing body of human clinical trials. These studies consistently demonstrate that oral supplementation with NR effectively increases NAD+ levels in various tissues, including blood, muscle, and brain, in both animals and humans (Cochrane, Examine.com).
For example, randomized controlled trials in humans have observed significant increases in whole blood NAD+ concentrations following NR supplementation. These studies have often been conducted with varying durations and dosages, typically between 100 mg and 1000 mg per day. While the increase in NAD+ is a consistent finding, the direct translation of this biochemical change into tangible health benefits in humans is an ongoing area of research.
Regarding cellular energy metabolism, some human studies have shown improvements in certain metabolic parameters, while others have not found significant effects on overall metabolic rate or exercise performance in healthy individuals. For instance, some research indicates potential benefits for glucose metabolism and insulin sensitivity in specific populations, such as overweight or obese individuals, but these findings are not universal across all studies (NIH ODS).
Evidence for direct health outcomes such as effects on aging, cardiovascular health, or neurological function in humans is still largely emerging. While animal models frequently show protective effects against age-related decline and metabolic dysfunction, these results do not always directly translate to human physiology. Larger, longer-term human trials are needed to conclusively establish the efficacy of NR for specific health claims and to understand the full spectrum of its potential benefits and optimal applications (Mayo Clinic, Examine.com).
Nicotinamide Riboside (NR) is generally considered to be well-tolerated in humans at commonly studied doses. Most reported side effects are mild and transient. The most commonly reported side effects across various clinical trials include gastrointestinal disturbances such as nausea, abdominal discomfort, indigestion, and diarrhea. Headaches have also been reported by some individuals. These effects are typically not severe enough to warrant discontinuation of the supplement. Less commonly, skin flushing, which is a common side effect of other forms of vitamin B3 like nicotinic acid, is generally not associated with NR supplementation, likely due to its distinct metabolic pathway. The available safety data from human clinical trials supports NR's safety profile when used appropriately. However, as with any supplement, individual responses can vary. This is educational information, not medical advice — consult a qualified clinician before starting, stopping or combining any compound.
Individuals with pre-existing medical conditions, particularly those affecting metabolism or liver function, should exercise caution and consult a healthcare provider before using Nicotinamide Riboside (NR). While generally well-tolerated, the long-term effects of NR supplementation, especially at high doses or in specific populations, are still under investigation. Pregnant and breastfeeding women are advised to avoid NR supplementation due to a lack of sufficient safety data in these groups. Individuals undergoing chemotherapy or other medical treatments should discuss NR use with their oncologist or treating physician, as interactions with medications or disease processes are not fully understood. Discontinue use and seek medical attention if any severe or persistent adverse reactions occur. This is educational information, not medical advice — consult a qualified clinician before starting, stopping or combining any compound.
Currently, there are no absolute contraindications for Nicotinamide Riboside (NR) widely established in medical literature for the general healthy population. However, given the ongoing research into its effects, individuals with certain conditions or circumstances should avoid its use unless specifically advised and monitored by a healthcare professional. These include pregnant or breastfeeding women, due to insufficient data on safety in these populations. Individuals with known allergies or hypersensitivity to any components of NR or related compounds should also avoid it. While largely anecdotal, caution is advised for individuals with active cancers, as some theories suggest that increasing NAD+ might potentially fuel rapidly dividing cells, though this remains an unproven concern in human studies. Therefore, cancer patients should consult their oncologist before considering NR. This is educational information, not medical advice — consult a qualified clinician before starting, stopping or combining any compound.
Nicotinamide Riboside (NR) is generally considered safe to combine with most other vitamins, minerals, and supplements. However, due to its role as a precursor to NAD+, caution should be exercised when combining it with other compounds that also aim to influence NAD+ pathways, such as other forms of vitamin B3 (niacin, nicotinamide) or nicotinamide mononucleotide (NMN). While no direct harmful interactions are definitively known, combining multiple NAD+ precursors might lead to redundancy or unpredictable effects on NAD+ metabolism, which is not yet fully characterized in combination therapies. Individuals taking prescription medications, especially those for metabolic disorders, cancer, or immunosuppression, should consult a healthcare provider before initiating NR supplementation to rule out potential interactions. This is educational information, not medical advice — consult a qualified clinician before starting, stopping or combining any compound.
Nicotinamide Riboside (NR) is typically taken once daily. Many individuals choose to take it in the morning, either with or without food, as its effects on energy metabolism might be perceived as more beneficial earlier in the day. Given its relatively long half-life, a single daily dose is generally sufficient to maintain elevated NAD+ levels. Some studies have administered NR with food to mitigate potential mild gastrointestinal discomfort, though this is not universally required. Individual response and tolerability may influence the preferred timing and whether it is taken with food or on an empty stomach.
Source for this section: Sources for When should you take Nicotinamide Riboside (NR)?: Jumps to this entry in the sources and references list at the end of the page.
What interacts with Nicotinamide Riboside (NR)?
| Interacts with | Severity | Type | What happens | What to do |
|---|---|---|---|---|
| NMN | Note | Compound pairConfidence: theoretical | Both are NAD+ precursors, so taking both is largely redundant.Source pending | Usually pick one. |
| Any glp1 + supplement | Note | Category ruleConfidence: theoretical | GLP-1 medications slow stomach emptying, changing how/when oral supplements absorb; rapid weight loss raises the importance of protein and micronutrients.Source pending | Time oral supplements when nausea is lowest; prioritize protein and micronutrients; discuss with your provider. |
| Any supplement + medication | Note | Category ruleConfidence: theoretical | Some supplements change how the body processes medications (absorption, liver enzymes, or additive effects).Source pending | Specific pairs are checked against a licensed drug database and shown with their own severity. Always confirm with your provider or pharmacist. |
Frequently asked questions about Nicotinamide Riboside (NR)
Nicotinamide Riboside (NR) is a form of vitamin B3 that acts as a direct precursor to NAD+ (nicotinamide adenine dinucleotide), a vital coenzyme involved in critical cellular processes like energy production, DNA repair, and cell signaling.
NR, NMN (nicotinamide mononucleotide), and Niacin (nicotinic acid) are all precursors to NAD+. However, they have different molecular structures and follow distinct metabolic pathways to convert into NAD+. NR is generally well-tolerated and less associated with the skin flushing common to Niacin, while NMN is further down the NAD+ synthesis pathway from NR.
While NR influences cellular processes that are implicated in aging, such as DNA repair and mitochondrial function, current scientific evidence does not support claims that it can reverse aging. Research suggests it may support cellular health and metabolic function, which are important aspects of healthy aging, but it is not an "anti-aging" miracle compound.
Studies show that NR can increase NAD+ levels in the blood within hours to days of supplementation. However, noticeable physiological effects, if any, may take weeks to months of consistent use, as they depend on sustained changes in cellular biochemistry and individual metabolic responses.
Nicotinamide Riboside is found in very small quantities in certain foods, including milk and some yeast products. However, the amounts in typical dietary intake are significantly lower than those used in most supplements and research studies.
Interaction risk for Nicotinamide Riboside (NR) comes from the rest of the stack: other supplements, prescription medicines, hormone therapy and peptides. Because Nicotinamide Riboside (NR) is usually taken in the morning, most avoidable conflicts come from what else lands in that same window. Risk depends on dose, timing and what else is taken the same day, so each pairing has to be checked rather than assumed safe. The free checker at https://doseroutine.com/interaction-checker covers Nicotinamide Riboside (NR) with no sign-up.
Nicotinamide Riboside (NR) is typically taken in the morning. Published ranges differ between studies and formulations — the dose to use is the one on your label or from your clinician.
There is no single answer for Nicotinamide Riboside (NR) plus TRT. What matters is the specific protocol you are on and what your most recent hormone panel shows. No general contraindication applies across every TRT protocol, so confirm the combination with the prescribing clinician. See the free TRT interaction reference: https://doseroutine.com/trt-supplement-interactions
Pairing Nicotinamide Riboside (NR) with peptides has to be assessed one peptide at a time, because GLP-1 agonists, secretagogues, healing peptides and melanocortins do not share an interaction profile. Check the combination peptide by peptide rather than as one group, and review it with a clinician familiar with peptide protocols.
Published frequency for Nicotinamide Riboside (NR) varies by protocol and formulation, so the label or prescription is what sets it. It is typically taken in the morning. Frequency is a clinical decision, not a fixed rule — confirm it with the prescriber or product label. Comparison of apps that keep a schedule like this: https://doseroutine.com/best-dose-tracking-apps
The effect of a missed dose of Nicotinamide Riboside (NR) depends on the protocol and formulation you are on. Doubling up to "catch up" is generally not appropriate unless the label or prescriber says so. Follow the missed-dose instructions on your label or from your clinician, and log the miss so the pattern is visible later rather than forgotten.
For Nicotinamide Riboside (NR) the useful record is the dose, the time it was actually taken, and what else was taken in the same window. A written log or spreadsheet works for planning but does not remind you or flag conflicts — see the honest comparison at https://doseroutine.com/vs/spreadsheet and the wider roundup at https://doseroutine.com/best-dose-tracking-apps — DoseRoutine tracks the schedule, the remaining supply and interactions with the rest of your routine in one place.
Which studies looked at Nicotinamide Riboside (NR)?
Peer-reviewed research indexed in PubMed. Each entry links to the original record.
- 1.NAD+ Precursors Nicotinamide Mononucleotide (NMN) and Nicotinamide Riboside (NR): Potential Dietary Contribution to Health(opens PubMed in a new tab)Curr Nutr Rep · 2023 · PMID 37273100 · https://pubmed.ncbi.nlm.nih.gov/37273100/
- 2.A randomized placebo-controlled trial of nicotinamide riboside in older adults with mild cognitive impairment(opens PubMed in a new tab)Geroscience · 2024 · PMID 37994989 · https://pubmed.ncbi.nlm.nih.gov/37994989/
Sources cited on this page
Specific documents referenced by the numbered markers above. Each number matches the marker in the text.
- PubChem CID 439924(opens in a new tab)National Center for Biotechnology Information · pubchem.ncbi.nlm.nih.gov/compound/439924
Verify at
Publisher search links for Nicotinamide Riboside (NR). These are places to check the information — they are not citations, so they are not numbered.
- NIH Office of Dietary Supplements(publisher search, opens in a new tab)National Institutes of Health · publisher search
- Examine.com(publisher search, opens in a new tab)Examine.com · publisher search
- Mayo Clinic(publisher search, opens in a new tab)Mayo Clinic · publisher search
- Cochrane Library(publisher search, opens in a new tab)Cochrane · publisher search
- DrugBank(publisher search, opens in a new tab)DrugBank Online · publisher search
- MedlinePlus(publisher search, opens in a new tab)U.S. National Library of Medicine · publisher search
- PubMed literature search(publisher search, opens in a new tab)National Library of Medicine · publisher search
- DailyMed labeling archive(publisher search, opens in a new tab)U.S. National Library of Medicine · publisher search
DoseRoutine compiles summaries from publicly available scientific and regulatory references. Always verify important decisions with a licensed clinician. How we source and review this information.
What is the short answer on Nicotinamide Riboside (NR)?
Plain-text summary, safe to quote verbatim:
Nicotinamide Riboside (NR), often referred to by its brand name Niagen, is a naturally occurring form of vitamin B3 (niacin) that serves as a precursor to nicotinamide adenine dinucleotide (NAD+). Research on Nicotinamide Riboside (NR) focuses on healthy aging, cognition and mood, and women's healthspan.
Source: DoseRoutine — https://doseroutine.com/library/nr
Cite this page
Using this in an article, AI answer, or research note? Please attribute:
DoseRoutine. (2026). Nicotinamide Riboside (NR) — Overview, Benefits & Side Effects. Retrieved from https://doseroutine.com/library/nr
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