There is no single standard NAD+ injection dosage. NAD+ injection plans are usually individualized by a licensed clinician based on route, goals, tolerance, medical history, and side effects. Compounded NAD+ is not FDA-approved, and human evidence for longevity benefits remains limited, so dosing should be provider-guided rather than self-selected.
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See if you qualify →What is the usual NAD+ injection dosage?
NAD+ injection dosing is not standardized because compounded NAD+ products vary by route, concentration, and clinical plan. FDA notes that compounded drugs are not FDA-approved and are not evaluated by FDA for safety, effectiveness, or quality before they are marketed, which is one reason online dosage charts should not replace clinician guidance 1.
Why there is no universal NAD+ injection dose
NAD+ is not like a one-size-fits-all vitamin. It is a redox coenzyme that helps move electrons through cellular energy pathways and supports enzyme families involved in DNA repair and cell signaling, including sirtuins and PARPs 2, 3.
Clinicians also think about tolerance. NAD+ may be given by subcutaneous injection, intramuscular injection, IV infusion, or nasal spray, and each route can feel different. A dose that is comfortable by one route may not be comfortable by another.
How route, concentration, and frequency change the total weekly dose
The number on a vial does not tell the whole story. Total exposure depends on how many milligrams are in each dose, how many doses are used in a week, and the pharmacy concentration in mg/mL.
For example, some published NAD+ materials discuss subcutaneous injections in lower single-dose amounts than IV infusion examples, while IV infusion studies have used much larger supervised doses over hours. In one pilot human study, researchers administered 750 mg over 6 hours by IV infusion to healthy participants; that was a study design, not a home dosing instruction 4.
How do clinicians think about NAD+ dosing?
Clinicians usually think in terms of route, starting tolerance, single-dose amount, weekly total, and response over time. With NAD+ dosing, comfort and safety matter more than chasing a high number.
Starting low and titrating slowly
Many clinician-supervised compounded protocols use a cautious start and adjust over time. The reason is practical: nausea, flushing, headache, fatigue, or local irritation can limit how well a person tolerates NAD+ 3, 4.
That does not mean every person needs the same starting point. Medical history, current medications, pregnancy status, allergy history, kidney or liver disease, and the reason for treatment all matter.
Single-dose amount versus weekly total
A single dose is the amount used at one time. Weekly total is the sum across the week. Two people can have the same weekly total but very different experiences if one uses smaller doses more often and the other uses a larger dose less often.
Loading phases versus maintenance plans
Some wellness clinics and compounding materials describe a higher-frequency early phase followed by a lower-frequency maintenance phase. These are practice patterns, not FDA-approved dosing schedules, and they should be interpreted through a clinician’s plan rather than copied from a chart 1.
Why tolerance matters more than chasing a high dose
NAD+ biology is complex. Reviews of NAD+ boosters note open questions about dose, timing, pharmacokinetics, tissue specificity, long-term safety, and side effects 3. More is not automatically better.
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Considering NAD+ with clinician guidance?
Chia offers NAD+ injection and NAD+ nasal spray after a 100% online health questionnaire and review by a licensed US provider. Plans currently start at $179/mo for NAD+ injection and $119/mo for NAD+ nasal spray. A prescription requires a medical evaluation and is not guaranteed. Compounded drugs are not FDA-approved.
What should a NAD+ injection dosage chart include?
A useful chart should separate route, concentration, single-dose amount, volume, frequency, and monitoring notes. A NAD+ injection dosage chart should never replace the prescription label or the clinician’s instructions.
Educational dosage chart by route
| Route | How it is usually framed in clinical materials | What changes the dose math | Key safety point |
|---|---|---|---|
| Subcutaneous injection | Often discussed as smaller-volume injections under the skin, with titration based on comfort | mg per dose, mg/mL concentration, number of weekly injections | Injection-site irritation and nausea can affect tolerability |
| Intramuscular injection | Often discussed as a shot into muscle, sometimes less frequent than subcutaneous use | mg per dose, injection volume, muscle-site tolerance | Soreness and local reactions can matter |
| IV infusion | Usually administered in a clinic or supervised setting over time; one pilot study used 750 mg over 6 hours | infusion dose, dilution, infusion speed, monitoring time | Speed and dose may affect flushing, chest pressure, nausea, or headache |
| Nasal spray | A non-injection option used in some compounded programs | spray concentration, sprays per use, frequency | Nasal irritation and variable absorption may be relevant |
This chart is educational. It shows what a safe chart should track; it is not a dosing plan. Human IV research and FDA compounding materials show that NAD+ exposure can vary widely by route and setting 1, 4.
How mg, mL, and syringe units are different
Milligrams, or mg, describe the amount of NAD+. Milliliters, or mL, describe the liquid volume. Syringe units are markings on a syringe and only make sense when you know the pharmacy concentration.
Why pharmacy concentration changes the math
A prescription label may use a concentration such as mg/mL. If the concentration changes, the same mL volume can contain a different mg amount. That is why patients should not copy another person’s syringe volume.
Why patients should follow the prescription label rather than online charts
Online charts cannot see your medical history, medication list, lab context, or side effects. FDA explains that compounded drugs are made for patients whose needs cannot be met by an FDA-approved drug, but they are not FDA-approved and do not go through FDA premarket review for safety, effectiveness, or quality 5.
How often are NAD+ injections usually taken?
NAD+ injection frequency varies. Some plans use weekly dosing, some use multiple-times-weekly schedules, and some start with a short higher-frequency phase before moving to maintenance, but frequency should come from the prescriber, not a search result.
Weekly versus multiple-times-weekly schedules
The same weekly total can be split in different ways. Smaller, more frequent doses may be easier for some people, while others prefer fewer administrations. Route, side effects, and adherence all influence the plan.
Why daily NAD+ injections are not always used
Daily use may not be needed or well tolerated for every person. Reviews of NAD+ boosters highlight that the field still lacks clear answers on optimal dose, timing, duration, and long-term safety 3.
How maintenance schedules may differ from starting schedules
A starting schedule is often used to assess tolerance. A maintenance schedule may be less frequent, lower, or otherwise adjusted if side effects appear or goals change. Those changes should happen with the prescribing clinician.
What side effects can affect NAD+ injection dosing?
Side effects can change the dose, route, speed, or frequency of an NAD+ plan. The most discussed tolerability issues include nausea, headache, flushing, fatigue, and injection-site irritation 3, 4.
Common tolerability issues
- Nausea or stomach discomfort
- Headache
- Flushing or warmth
- Fatigue or lightheadedness
- Injection-site pain, redness, itching, or swelling
- Nasal irritation with nasal spray
Why dose, speed, and route may affect side effects
IV infusion speed can affect how a person feels during treatment. Injection route and volume can affect local irritation. For compounded at-home medications, the care team may adjust route, dose amount, or frequency when side effects occur.
When to contact the prescribing clinician
Contact the prescribing clinician for severe nausea, chest discomfort, trouble breathing, fainting, signs of allergy, infection at an injection site, or any symptom that feels unsafe. A licensed prescriber can decide whether to pause, change, or stop treatment.
What does the evidence say about NAD+ for energy, aging, and longevity?
The honest answer: NAD+ biology is real, but human outcome evidence is still limited. Human studies have not proven that NAD+ injections extend lifespan, and individual results vary.
Human clinical evidence: promising but limited
A systematic review of human NAD+ therapeutic research found only a small number of randomized and adequately powered clinical trials. The authors concluded that results were promising but still speculative for some areas, and that more trials are needed to define target conditions, dosing, and comparisons with standard care or lifestyle approaches 2.
Human studies often use NAD+ precursors rather than NAD+ injections. In a randomized crossover study, nicotinamide riboside, or NR, increased blood NAD+ metabolites in healthy middle-aged and older adults, but that does not prove better long-term health or longer life 6.
Observational and mechanistic evidence: NAD+ changes with age
NAD+ metabolism changes with aging, inflammation, and tissue context. Reviews describe roles for CD38, sirtuins, PARPs, mitochondria, the NAD+ salvage pathway, and DNA repair, but they also stress that tissue-specific effects remain uncertain 3, 7.
Animal and cell evidence: why it cannot prove human lifespan extension
Animal and cell studies suggest that NAD+ restoration may affect mitochondrial function and age-related pathways. That is useful biology, but preclinical findings do not prove that NAD+ injections extend human lifespan 3, 8.
What is still unknown about long-term safety and optimal dosing
Researchers still need better answers on dose, timing, bioavailability, tissue specificity, side effects, and long-term safety of NAD+ boosters 3. That uncertainty is one reason clinician-guided dosing matters.
How do NAD+ injections compare with NAD+ nasal spray and oral precursors?
NAD+ injections, NAD+ nasal spray, and oral precursors are different tools. NAD+ nasal spray may be more convenient for some people, while injections offer a more direct route, and oral precursors have more supplement-style human study data.
| Option | What it is | Potential advantage | Evidence limit |
|---|---|---|---|
| NAD+ injection | Compounded nicotinamide adenine dinucleotide given subcutaneously or intramuscularly, depending on the prescription | Direct administration with clinician oversight | No FDA-approved NAD+ injection dosing standard for longevity |
| NAD+ nasal spray | Compounded NAD+ delivered through the nose | Needle-free and convenient | Absorption and clinical outcomes are less well defined |
| NR supplement | Nicotinamide riboside, a vitamin B3-related NAD+ precursor | Human studies show it can raise NAD+ metabolites | Raising a biomarker does not prove lifespan extension |
| NMN supplement | Nicotinamide mononucleotide, another NAD+ precursor | Studied as an NAD+ booster | Dose, timing, long-term safety, and outcomes remain under study |
| Niacin or nicotinamide | Vitamin B3 forms involved in NAD+ biology | Widely available nutrients | Different forms can have different tolerability and metabolic effects |
NAD+ boosters include nicotinamide riboside, nicotinamide mononucleotide, nicotinamide, nicotinic acid, and tryptophan, plus strategies that affect NAD+ synthesis or consumption 3. These are not interchangeable with a prescribed compounded NAD+ injection.
NAD+ injections at Chia: online evaluation, injection or nasal spray
At Chia, we offer NAD+ injection and NAD+ nasal spray through a 100% online process. NAD+ injection plans currently start at $179/mo, and NAD+ nasal spray plans currently start at $119/mo.
You start with a short health questionnaire. A licensed US provider reviews your history and prescribes only when clinically appropriate. If prescribed, medication is compounded in the US by a state-licensed 503A pharmacy and shipped to your door.
| Chia option | Form | Current starting price | Who may prefer it |
|---|---|---|---|
| NAD+ | Injection | From $179/mo | People comfortable with injections who want provider-guided compounded NAD+ |
| NAD+ | Nasal spray | From $119/mo | People who prefer a needle-free option |
| Foundation Longevity | Sermorelin Injection + NAD+ Injection + Glutathione Injection | From $399/mo | People interested in a broader clinician-reviewed longevity protocol, without assuming proven lifespan extension |
Some patients exploring cellular-energy support also ask about our Foundation Longevity protocol, which includes Sermorelin Injection, NAD+ Injection, and Glutathione Injection. Others may discuss Weight + Energy or Glow if those goals fit their medical review. These protocols are not claims of lifespan extension.
Dosing at Chia is provider-guided and may be adjusted over time through the patient portal. You can message your care team between visits. If you are ready to start, the eligibility quiz is available at /quiz.
Who may not be a good fit for NAD+ injections?
NAD+ is not right for everyone. Eligibility depends on medical history, current medications, allergy history, pregnancy or breastfeeding status, and serious medical conditions.
Why medical history and current medications matter
NAD+ participates in many enzyme systems, including redox reactions, sirtuins, PARPs, and CD38-related pathways 3. Because those systems are broad, a clinician should review health history before prescribing.
Pregnancy, breastfeeding, allergy, and serious medical conditions
People who are pregnant, breastfeeding, allergic to any ingredient, or living with serious medical conditions may not be good candidates. Long-term safety data for NAD+ boosters remain limited, so careful screening matters 3.
Why a prescription is never guaranteed
A prescription is a medical decision. At Chia, our providers prescribe compounded NAD+ only when they decide it is clinically appropriate after review.
3-min quiz
Start with an online NAD+ evaluation
If NAD+ fits your goals, you can complete Chia’s online eligibility visit. A licensed provider will review your health history and decide whether NAD+ injection or nasal spray is appropriate. A prescription is never guaranteed, and compounded medications are not FDA-approved.
FAQ: NAD+ injection dosage
There is no single best NAD+ injection dose. The right plan depends on route, concentration, medical history, goals, tolerance, and side effects. A licensed clinician should determine the dose.
Some protocols may use frequent dosing, but daily NAD+ injections are not right for everyone. Frequency should come from the prescription label and the prescribing clinician, not an online chart.
Some people look for changes in energy or fatigue, but response is variable and not guaranteed. Human evidence is still limited, and current research does not prove that NAD+ injections extend lifespan.
Compounded NAD+ injections are not FDA-approved and are not reviewed by FDA for safety, effectiveness, or quality before dispensing. They require a prescription from a licensed clinician.
Not necessarily. Higher doses may cause more side effects, and researchers have not established an optimal NAD+ dose for longevity. Tolerability and clinician oversight matter more than chasing a high number.
Current human evidence does not prove that NAD+ injections extend human lifespan. NAD+ biology is important, and animal and cell studies are interesting, but they cannot prove human longevity benefits.
Yes, when clinically appropriate, NAD+ injections can be prescribed through a licensed telehealth process. At Chia, a provider reviews your online health questionnaire before deciding whether treatment is appropriate.
Follow the instructions from your prescribing clinician or contact your care team. Do not double up or change your schedule unless your clinician tells you to.
References
- 1.U.S. Food and Drug Administration. Compounded Drugs: Information for Patients. 2026.
- 2.Katsyuba E, Romani M, Hofer D, Auwerx J. Clinical Evidence for Targeting NAD Therapeutically. Nutrients. 2020.
- 3.Canto C, Menzies KJ, Auwerx J. Current Uncertainties and Future Challenges Regarding NAD+ Boosters. Antioxidants. 2022.
- 4.Grant R, Berg J, Mestayer R, Braidy N, Bennett J, Broom S, Watson J. A Pilot Study Investigating Changes in the Human Plasma and Urine NAD+ Metabolome During a 6 Hour Intravenous Infusion of NAD+. Frontiers in Aging Neuroscience. 2019.
- 5.U.S. Food and Drug Administration. Compounding and the FDA: Questions and Answers. 2026.
- 6.Martens CR, Denman BA, Mazzo MR, et al. Chronic Nicotinamide Riboside Supplementation Is Well-Tolerated and Elevates NAD+ in Healthy Middle-Aged and Older Adults. Nature Communications. 2018.
- 7.Camacho-Pereira J, Tarragó MG, Chini CCS, et al. CD38 Dictates Age-Related NAD Decline and Mitochondrial Dysfunction through an SIRT3-Dependent Mechanism. Cell Metabolism. 2016.
- 8.Mouchiroud L, Houtkooper RH, Moullan N, et al. The NAD+/Sirtuin Pathway Modulates Longevity through Activation of Mitochondrial UPR and FOXO Signaling. Cell. 2013.
About this article
Chia Health Editorial Team — Evidence-reviewed health education
This article is for educational purposes only and is not a substitute for individualized medical advice. Talk to a licensed clinician before starting, stopping, or changing any prescription.
AI tools may assist with research and drafting. Chia's editorial team reviews source use, clarity, treatment information, and safety framing before publication. A clinician is named only after explicit sign-off. Read our editorial standards.
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