What Is NAD+?

NAD+ stands for Nicotinamide Adenine Dinucleotide, a coenzyme found in every cell of your body. Think of it as cellular fuel — without enough NAD+, your cells can’t produce the energy they need to function properly. For a deeper dive into the science, see our complete guide to what NAD+ is.

What NAD+ Does in Your Body

Energy Production
NAD+ is required for mitochondrial function. Your mitochondria convert food into ATP (adenosine triphosphate), which powers everything from muscle contractions to brain activity. Low NAD+ means less efficient energy production.

DNA Repair
Your DNA gets damaged thousands of times daily from normal cellular processes and environmental factors. NAD+ activates enzymes called PARPs that repair this damage. Without adequate NAD+, DNA damage accumulates faster.

Sirtuin Activation
Sirtuins are proteins often called “longevity genes” because of their role in aging and metabolism. NAD+ is required to activate all seven human sirtuins. This connection is why NAD+ gets so much attention in anti-aging research.

Why NAD+ Levels Decline

Several factors reduce your NAD+ levels:

• Age — The primary factor. NAD+ declines steadily from your 20s onward
• Chronic inflammation — Uses up NAD+ faster than normal
• DNA damage — Requires NAD+ for repair, depleting reserves
• Lifestyle factors — Poor sleep, high stress, and alcohol consumption accelerate decline
• Metabolic dysfunction — Obesity and metabolic syndrome are linked to lower NAD+ levels

By age 60, most people have roughly half the NAD+ they had at age 30. This decline correlates with many age-related health issues, though the exact causal relationships are still being studied.

NAD+ Treatment Options Compared

There are five main ways to boost your NAD+ levels. Each has different pros and cons for cost, effectiveness, and convenience.

IV Therapy

NAD+ IV therapy delivers the coenzyme directly into your bloodstream, bypassing digestion entirely. This means close to 100% of the NAD+ reaches your cells.

The process: A healthcare provider inserts an IV line and slowly infuses NAD+ over 2-4 hours. The slow rate minimizes side effects like flushing and nausea.

Cost: $250-$1,500 per session depending on the dose (250mg to 1000mg) and provider. Most clinics offer package deals for multiple sessions. See our complete pricing breakdown.

Best for: People who want maximum results, are addressing acute issues, or can afford premium pricing. See our complete NAD+ IV therapy guide.

Subcutaneous Injections

NAD+ injections are self-administered at home using a small needle, similar to insulin injections for diabetics.

The process: You inject a small dose (typically 50-100mg) into fatty tissue, usually in the abdomen. Most people inject 2-3 times per week.

Cost: $50-$350 per month through telehealth providers like AgelessRx, Shed, and others. See our injection pricing breakdown.

Best for: People who want better absorption than supplements without the time and cost of IV therapy. See our complete NAD+ injections guide.

Oral Supplements

Oral NAD+ supplements come in several forms, each with different absorption rates:

• NMN (Nicotinamide Mononucleotide) — A direct precursor to NAD+
• NR (Nicotinamide Riboside) — Another NAD+ precursor with the most human research
• Direct NAD+ — NAD+ itself, though absorption is debated
• Niacinamide — A cheaper B3 form that converts to NAD+

Cost: $30-$80 per month for quality products.

Best for: Budget-conscious users, those maintaining NAD+ levels rather than addressing acute deficiency, and anyone who prefers pills over needles. See our complete NAD+ supplements guide.

Patches and Nasal Spray

Transdermal patches and nasal sprays offer needle-free alternatives to injections.

Patches deliver NAD+ through the skin. Research on transdermal NAD+ absorption is limited, so effectiveness varies.

Nasal spray delivers NAD+ through mucous membranes, potentially offering faster absorption than oral supplements.

Both options are available from select providers, though they’re less commonly used than injections or supplements.

NAD+ Benefits: What the Research Shows

NAD+ therapy is promoted for many benefits. Here’s what the science actually supports. For the complete breakdown with evidence ratings, see our full NAD+ benefits guide.

Strong Evidence (Animal Studies + Early Human Data)

Cellular Energy Production
NAD+ is definitively required for ATP synthesis. Boosting NAD+ has been shown to improve mitochondrial function in multiple studies. Whether this translates to noticeable energy improvements in healthy humans is still being studied, though many users report feeling more energetic.

DNA Repair Support
NAD+ is required for PARP enzymes that repair DNA damage. This mechanism is well-established biochemistry, not speculation.

Promising Evidence (Animal Studies, Limited Human Data)

Cognitive Function
Animal studies show NAD+ boosting improves brain function and protects against neurodegeneration. Human studies are smaller and shorter-term, but some show improvements in mental clarity and focus.

Anti-Aging Effects
David Sinclair’s lab at Harvard and other research groups have demonstrated NAD+-related lifespan extension in mice. Human longevity studies take decades, so we don’t have direct evidence yet, but the mechanistic data is compelling.

Metabolic Health
Some studies link higher NAD+ levels to improved insulin sensitivity and metabolic markers. Results are mixed across different populations.

Limited or Preliminary Evidence

Addiction Recovery
NAD+ IV protocols are used in some addiction treatment centers. Anecdotal reports are positive, but controlled trials are limited.

Athletic Performance
Athletes use NAD+ for recovery. The logic is sound (better cellular energy and repair), but sports performance data is mostly anecdotal.

NAD+ vs NMN vs NR: Which Should You Take?

When shopping for NAD+ supplements, you’ll encounter three main options: NAD+, NMN, and NR. Here’s the difference:

NAD+ is the molecule your cells actually use. Direct supplementation is available, but absorption is debated because NAD+ is a large molecule.

NMN (Nicotinamide Mononucleotide) is one step away from NAD+ in your body’s synthesis pathway. Your cells convert NMN directly into NAD+. NMN has its own cellular transporter, which may improve absorption.

NR (Nicotinamide Riboside) is two steps away from NAD+. It converts to NMN, then to NAD+. NR has the most published human research and is available as the branded supplement Tru Niagen.

Bottom line: If you want the most research-backed option, choose NR. If you want the most direct pathway to NAD+, choose NMN. Both are reasonable choices; the research hasn’t declared a clear winner.

NAD+ Cost Breakdown

Understanding what you’ll actually pay helps you budget and avoid surprises.

IV Therapy Cost

• Per session: $250-$1,500 depending on dose and clinic
• Package deals: Often 10-15% off when buying multiple sessions
• Loading protocol: Some clinics recommend 3-4 sessions in the first two weeks
• Maintenance: Monthly or quarterly sessions
• Annual cost: $3,000-$15,000+ for regular treatment

Injection Cost

• Monthly: $50-$350 through telehealth providers
• Includes: Consultation, medication, supplies, shipping
• Top providers: AgelessRx, Shed, Eden
• Annual cost: $600-$4,200

Supplement Cost

• Monthly: $30-$80 for quality NMN or NR
• Premium options: Up to $100+ for liposomal or high-dose formulations
• Annual cost: $360-$1,200

Insurance Coverage

NAD+ therapy is rarely covered by insurance because it’s not FDA-approved for any medical condition. Expect to pay out of pocket. Some people use HSA/FSA funds for NAD+ supplements and treatments.

Top NAD+ Providers

If you’re ready to try NAD+ therapy, here are the top-rated telehealth providers for at-home treatments:

AgelessRx

Best for: Variety of NAD+ options

• Offers injections, nasal spray, and patches
• Part of a broader longevity medicine platform
• Licensed physicians review all prescriptions

Shed

Best for: Combined GLP-1 and NAD+ treatments

• Offers NAD+ as part of their longevity category
• Also provides weight loss medications
• 150,000+ members across their platform

Eden

Best for: Affordability

• Competitive pricing on NAD+ injections
• Simple telehealth process
• Focused on accessible longevity treatments

Side Effects and Safety

NAD+ therapy is generally well-tolerated, but side effects can occur, especially with IV infusions. See our complete NAD+ side effects guide for details on what to expect and how to minimize discomfort.

Common Side Effects

During IV infusion:

• Flushing (face and chest warmth/redness)
• Nausea
• Lightheadedness
• Chest tightness
• Headache

These typically resolve within hours and can be minimized by slowing the infusion rate.

Injection side effects:

• Injection site soreness
• Mild nausea
• Fatigue (temporary)

Supplement side effects:

• Generally minimal at recommended doses
• High doses of niacin-based precursors can cause flushing

Who Should Be Cautious

Consult a healthcare provider before starting NAD+ therapy if you:

• Are pregnant or breastfeeding
• Have a history of cancer (NAD+ supports all cell growth, including potentially cancer cells)
• Take medications that may interact
• Have any chronic health conditions

Who Should Consider NAD+ Therapy?

NAD+ therapy isn’t for everyone. Here’s who tends to benefit most:

Good Candidates

Adults over 40
NAD+ levels decline noticeably from your 40s onward. If you’re experiencing age-related fatigue, brain fog, or slower recovery from exercise, NAD+ therapy may help address the underlying cellular energy deficit.

High-stress professionals
Chronic stress accelerates NAD+ depletion. Executives, healthcare workers, and others with demanding jobs often report improved mental clarity and stress resilience with NAD+ supplementation.

Athletes and fitness enthusiasts
NAD+ supports mitochondrial function and cellular repair, both of which matter for athletic performance and recovery. Some athletes use NAD+ therapy during intense training blocks.

People interested in longevity
If you’re already taking other longevity-focused supplements or following protocols like caloric restriction or intermittent fasting, NAD+ therapy fits into that framework.

Who Should Wait or Avoid

Pregnant or breastfeeding women
Safety data in pregnancy doesn’t exist. Avoid NAD+ therapy until you’re no longer pregnant or nursing.

Anyone with active cancer
NAD+ supports cellular growth and energy production in all cells, including potentially cancerous ones. If you have active cancer, discuss NAD+ with your oncologist before proceeding.

People on tight budgets
If NAD+ therapy would strain your finances, focus on lifestyle factors that naturally support NAD+ levels: regular exercise, adequate sleep, and avoiding excessive alcohol.

Getting Started with NAD+ Therapy

Ready to explore NAD+ therapy? Here’s how to proceed:

1. Decide on your delivery method — Consider your budget, time, and comfort with needles. Supplements are easiest to start; injections offer a good middle ground; IV therapy provides maximum absorption.
2. Research providers — For injections or IV therapy, choose a licensed provider with good reviews. Check for LegitScript certification and clear pricing.
3. Complete a medical consultation — Any reputable provider will require a health questionnaire and physician review before prescribing NAD+ therapy.
4. Start with a lower dose — Most protocols begin with lower doses and increase gradually to minimize side effects.
5. Track your results — Note your energy levels, mental clarity, sleep quality, and any side effects. This helps you and your provider optimize your protocol.