NAD+ Wellness Explained: Uses, Benefits, and Medical Guidance

Every living cell depends on NAD+ (nicotinamide adenine dinucleotide) to support energy production, cellular repair, and the countless cellular processes that keep the body functioning.

As interest in healthy aging, metabolic health, and mitochondrial function continues to grow, researchers are studying whether supporting NAD levels through NAD therapy, oral supplements, IV therapy, or subcutaneous injections may help promote cellular health, although many proposed benefits still require additional clinical trials and long-term safety data.

NAD+ therapy consultation for cellular wellnes

At Internal Healing and Wellness MD, we evaluate NAD therapy within the context of a patient's medical history, current health status, and overall wellness goals rather than as a one-size-fits-all solution.

Disclaimer: This information is for educational purposes only and should not be considered medical advice. NAD+ therapy should only be used under the guidance of a qualified healthcare provider after an individualized medical evaluation.

Medically reviewed by Dr Imran Khan, MD, ABIM, IFMCP | Last medically reviewed: August 13, 2026

What Is NAD+ and What Does It Do in the Body?

NAD+ is a naturally occurring coenzyme found in every one of your living cells.

It isn't a vitamin, hormone, or stimulant. Instead, it acts behind the scenes to support energy production, cellular health, and the cellular processes that keep tissues functioning normally.

The Body's Cellular Energy Helper

One of NAD+'s most important jobs is helping cells convert nutrients into usable energy. This process supports cell metabolism, healthy mitochondrial function, and normal cell function, making NAD+ essential for maintaining overall metabolic health.

More Than Energy Production

Beyond fueling cells, NAD+ also supports several critical biological functions:

  • Helps repair damaged DNA and supports cellular repair
  • Assists enzymes involved in responding to oxidative stress
  • Supports communication between energy production and repair pathways
  • Plays a role in maintaining normal cellular health as the body ages

These functions have made NAD+ a growing area of interest in healthy aging and longevity research.

Why NAD+ Levels May Change with Age and Health

While the body has systems to maintain healthy NAD levels, certain lifestyle, environmental, and health factors may influence how efficiently this balance is maintained over time.

  • Aging: Natural changes in metabolism may affect how efficiently NAD+ is produced and recycled.
  • Chronic inflammation and oxidative stress: Ongoing cellular stress can increase the demand for NAD+, potentially affecting cellular health over time.
  • Poor sleep and lifestyle factors: Inadequate sleep, excessive alcohol use, and other habits that affect overall metabolic health may also influence NAD+ metabolism.
  • Metabolic disorders and certain medical conditions: Some chronic diseases, along with certain medications, may alter how the body regulates NAD+ and supports normal energy production.
  • Nutrition: A balanced diet provides vitamin B3, which the body uses to produce NAD+, although diet alone may not address every factor affecting NAD levels.

Potential Benefits Under Investigation

Researchers are studying several possible NAD+ benefits, but increased NAD levels should not be interpreted as guaranteed improvements in symptoms, function, or long-term health.

Human trials remain relatively small, and outcomes vary by population, formulation, and treatment duration.

Cellular Energy and Mitochondrial Function

NAD+ helps mitochondria convert nutrients into cellular energy, which has prompted research into fatigue, exercise capacity, and cellular resilience.

However, while oral supplements such as nicotinamide riboside can raise NAD-related biomarkers, studies have not consistently shown that they boost energy levels, improve performance, or produce a noticeable energy boost.

Metabolic and Cardiovascular Health

Researchers have examined NAD+ precursors for their potential effects on:

  • Insulin sensitivity and glucose regulation
  • Body composition and weight management
  • Blood pressure and blood vessel function
  • Other markers of metabolic health and cardiovascular health

Results remain mixed. Some studies report changes in specific metabolic or vascular markers, while others show little clinical improvement despite higher NAD+ availability.

Brain and Cognitive Health

Because NAD+ supports energy metabolism and stress responses in brain cells, it is being studied in mild cognitive impairment and neurodegenerative conditions.

Small trials have shown that supplementation can increase blood or brain NAD+ and appears reasonably tolerated over the short term, but improvements in memory, mental clarity, or daily function have not yet been established.

Healthy Aging and Cellular Repair

NAD+ is required by sirtuins and other enzymes involved in DNA repair, stress signaling, and cellular senescence. These links have made NAD therapy a major focus in healthy aging and regenerative medicine, but much of the strongest evidence still comes from animal research.

Is NAD+ Good for You?

Yes, NAD+ is essential for normal body function, but that doesn't mean NAD+ supplementation or NAD therapy is appropriate for everyone.

Whether it may be beneficial depends on an individual's health status, treatment goals, and whether a qualified healthcare provider determines it is suitable based on current evidence.

Why NAD+ Therapy Isn't One-Size-Fits-All

The potential value of NAD therapy should be evaluated on a case-by-case basis, considering factors such as:

  • Current medications and therapies: Existing prescriptions, supplements, or cancer treatments should be reviewed.
  • Route of administration: Oral supplements, IV therapy, and subcutaneous injections differ in how they are delivered, studied, and monitored.
  • Nutritional and metabolic status: Diet, lifestyle, and underlying health.
  • Product quality and oversight: Injectable therapies should only be obtained from reputable medical providers under medical supervision.

Therapy Options Explained

NAD+ can be delivered in several ways, each with different absorption pathways, research evidence, and practical considerations. Understanding these differences helps set realistic expectations about what current studies do and do not support.

Oral Supplements That Help the Body Make NAD+

Many NAD+ supplements do not contain NAD+ itself. Instead, they provide forms of vitamin B3 that the body can convert into NAD+ through its normal processes.

Common options include:

  • Nicotinamide riboside (NR): One of the most researched ingredients used to help increase NAD levels.
  • Nicotinamide mononucleotide (NMN): Another ingredient the body can use to produce NAD+, which is still being studied in human research.
  • Niacinamide: A common form of vitamin B3 that supports normal NAD+ production.
  • Niacin: Another form of vitamin B3 that helps make NAD+, but it may cause skin flushing, especially at higher doses.

NAD+ Injections and IV Therapy

NAD therapy can also be given through IV therapy or subcutaneous injections instead of oral supplements.

  • Given by injection or IV: Delivers NAD+ without going through the digestive system.
  • Different treatment plans: IV doses, treatment time, and frequency vary based on the clinic and the person's needs.
  • Possible side effects: Nausea, flushing, stomach discomfort, an immediate headache, or chest discomfort during an IV infusion. A slower drip rate may help reduce these effects.
  • Research is still growing: Early studies are promising, but more human research is needed to confirm the long-term benefits and safety of NAD therapy.

NAD+ and Resveratrol

NAD therapy and resveratrol are sometimes used together because both are being studied for their role in healthy aging and cellular health.

  • NAD+ helps support energy production and normal cell function.
  • Resveratrol is being studied for its potential to protect cells from everyday stress.
  • Research has not confirmed that taking them together works better than using either one alone.

Talk with a qualified healthcare professional before combining supplements, especially if you take medications or have existing health conditions.

How Much NAD+ Should You Take?

There is no single recommended NAD dosage. The amount used in IV therapy, oral products, or injections should always be determined by a qualified healthcare provider.

  • Treatment goals: The right starting dose depends on whether the focus is to support energy levels, weight management, or other potential benefits.
  • Type of product: IV doses, injections, and oral products are not used the same way and should not be compared directly.
  • Your health: NAD levels, age, medications, and conditions such as kidney disease or severe liver disease may affect what is appropriate.
  • Safety first: Some people tolerate higher doses differently, and medical supervision helps ensure treatment is adjusted based on response.

Who May Benefit From NAD+ Wellness Support?

Not everyone needs NAD therapy, but some people may benefit from a personalized evaluation to determine whether it fits their health goals and overall wellness plan.

  • Adults with ongoing low energy levels or chronic fatigue after common medical causes have been evaluated.
  • People looking to support healthy aging, mitochondrial health, or overall wellness alongside healthy lifestyle habits.
  • Individuals with nutrition or lifestyle factors that may affect cell health and normal cellular function.
  • Those seeking structured wellness programs with regular follow-up to monitor progress and adjust care as needed.

Important Caution

People who are pregnant or breastfeeding, receiving treatment for active cancer, living with significant liver or kidney impairment, managing unstable heart conditions, taking multiple medications, or with a history of reactions to therapies from compounding pharmacies should undergo careful review and receive direct medical supervision before starting NAD therapy.

What Current Research Does and Does Not Show

Here's what researchers know today and what still needs more study.

What Research Supports

These findings are the most consistent across current studies.

  • NAD+ supplements can increase NAD levels in the body.
  • Some oral NAD+ products have been well tolerated in short-term studies involving healthy adults.
  • NAD+ is essential for helping cells produce energy and carry out many normal body functions.

What Is Still Being Studied

Early research suggests potential benefits, but results have not been consistent.

  • Whether NAD+ can boost energy levels or reduce fatigue.
  • Its effects on heart health, blood sugar, memory, exercise, and inflammation.
  • Whether different types of NAD therapy or higher doses lead to better results.

What Has Not Been Proven

Current research does not show that NAD+ can:

  • Reverse aging or help people live longer.
  • Treat chronic diseases on its own.
  • Replace healthy habits, regular medical care, or proven treatments.

How Functional Medicine Personalizes NAD+ Therapy

NAD therapy must be considered alongside your overall health to determine whether it may offer meaningful potential benefits.

  • Your health story: We review your symptoms, full medical history, sleep, stress, nutrition, alcohol use, and daily habits.
  • Looking beneath the surface: Testing may include metabolic markers, thyroid function, hormone balance, nutrient levels, inflammation, and other factors that can affect how you feel.
  • Your current treatment plan: We consider your prescriptions, supplements, and overall health.
  • Personalized care: Because individual responses vary, some people may benefit from NAD+ while others may need different strategies or further evaluation before treatment.

Disclaimer: This information is for educational purposes only and should not be considered medical advice. NAD+ therapy should only be used under the guidance of a qualified healthcare provider after an individualized medical evaluation.

Explore Medically Guided NAD+ Wellness

At Internal Healing and Wellness MD, NAD+ therapy begins with a review of symptoms, metabolic health, medications, and personal wellness goals.

Our team can determine whether NAD+ support fits into a broader functional medicine plan and recommend an appropriate route, monitoring schedule, and treatment strategy.

Schedule a consultation to explore evidence-informed NAD+ wellness under medical supervision.

Frequently Asked Questions

NAD+ is a natural molecule found in every cell that helps produce energy, supports cell repair, and keeps many normal body functions running. While these roles are well established, research is still evaluating how NAD+ therapy may benefit specific health conditions.

Current research has focused on NAD+'s role in cellular energy, metabolic health, brain function, heart health, and healthy aging. Some studies show promising results, but findings in people remain mixed and more research is needed.

NAD+ is naturally produced by the body, but NAD+ therapy is different from dietary supplements or compounded injections. At this time, NAD+ wellness infusions are not FDA-approved as treatments for aging or chronic diseases.

There is no set timeline. Some people notice changes within days or weeks, while others may not experience meaningful results. The response depends on your overall health, treatment goals, and the type of NAD+ therapy used.

Yes, NAD+ is sometimes used with resveratrol or other supplements in wellness programs. However, a healthcare provider should review your supplements and medications first to help avoid unwanted interactions or unnecessary overlap.

References

  • Covarrubias, A. J., Perrone, R., Grozio, A., & Verdin, E. (2021). NAD⁺ metabolism and its roles in cellular processes during ageing. Nature Reviews Molecular Cell Biology, 22(2), 119–141. https://doi.org/10.1038/s41580-020-00313-x
  • Damgaard, M. V., & Treebak, J. T. (2023). What is really known about the effects of nicotinamide riboside supplementation in humans. Science Advances, 9(29), eadi4862. https://doi.org/10.1126/sciadv.adi4862
  • Lautrup, S., Hou, Y., Fang, E. F., & Bohr, V. A. (2023). Roles of NAD⁺ in health and aging. Cold Spring Harbor Perspectives in Medicine, 13(12), a041193. https://doi.org/10.1101/cshperspect.a041193
  • Vinten, K. T., Trętowicz, M. M., Coskun, E., van Weeghel, M., Cantó, C., Zapata-Pérez, R., Janssens, G. E., & Houtkooper, R. H. (2025). NAD⁺ precursor supplementation in human ageing: Clinical evidence and challenges. Nature Metabolism, 7(10), 1974–1990. https://doi.org/10.1038/s42255-025-01387-7