NAD+ stands for nicotinamide adenine dinucleotide. It is a coenzyme present in every cell of the body and is essential for energy metabolism, DNA repair, and the activity of enzymes involved in cellular maintenance. NAD+ levels naturally decline with age, which is one reason supplemental NAD+ protocols have drawn interest in longevity medicine.

What are the benefits of NAD+ therapy?

Research suggests NAD+ supplementation may support cellular energy production, cognitive clarity, mitochondrial function, and DNA repair processes. Evidence in humans is still emerging, so we frame NAD+ as a potentially supportive tool rather than a guaranteed treatment for any specific condition.

How much does NAD+ cost at Defiant?

Protocols are tailored to your goals — pricing is discussed during your free consultation so you can choose the format and cadence that fits your plan.

Lisle, IL

NAD+ Therapy

Subcutaneous NAD+ injections and IV protocols to support energy, cognitive clarity, and cellular repair. Serving Lisle, Naperville, Downers Grove & Chicago’s western suburbs.

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What Is NAD+

A coenzyme your cells run on.

NAD+ (nicotinamide adenine dinucleotide) is a coenzyme present in every cell of the human body. It plays a central role in energy metabolism, DNA repair, and the activity of enzymes that maintain healthy cells. Without it, the basic machinery of life doesn’t run.

NAD+ levels naturally decline with age. That’s one reason supplemental NAD+ has become a focus in longevity medicine.

Why People Are Interested

+ NAD+ is essential to mitochondrial energy production
+ Levels decline meaningfully with age
+ Plays a role in DNA repair pathways
+ Activates sirtuins, a key longevity enzyme family
+ Active area of research in longevity medicine

Where The Research Is Pointing

What NAD+ may support.

01 — Energy

Energy & Mitochondrial Function

Mitochondria use NAD+ to convert food into usable cellular energy (ATP). Research suggests that restoring NAD+ availability may help support mitochondrial output and overall energy metabolism, especially in adults whose levels have declined with age.

Coenzyme for ATP production
Studied in age-related fatigue
Often paired with peptide and IV protocols

02 — Clarity

Cognitive Clarity

The brain is metabolically demanding, and emerging research is examining NAD+’s role in neuronal energy and resilience. Some clients report improved mental clarity, focus, and recovery from periods of fatigue or post-illness brain fog. Outcomes vary; we don’t promise specific results.

Active research area in neuroscience
Reported by clients post-illness
Hedged claim — evidence still emerging

03 — Repair

Cellular Repair & Longevity

NAD+ is a required substrate for sirtuins and PARP enzymes, which are involved in DNA repair and cellular stress response. This is the mechanism behind much of the longevity interest in NAD+. Human data is still building; we treat it as a supportive tool, not a cure.

Substrate for sirtuin enzymes
Involved in DNA repair pathways
Pairs naturally with longevity protocols

A note on honesty: NAD+ is an active area of research, not a miracle. We will tell you what the evidence supports and what it doesn’t. Book a free consult →

Injection vs IV

Two ways to deliver NAD+.

Subcutaneous Injection

NAD+ Injection

Lower-dose, in-and-out delivery. Quick visit, easier to fit into a weekly routine, less likely to cause the intense sensations some patients report on IV. A common starting point for clients new to NAD+.

· Faster appointment
· Lower dose per session
· More frequent cadence
· Generally well-tolerated

Intravenous Infusion

NAD+ IV

Higher-dose delivery in a single session. Takes longer (typically a few hours) and can be more intense — some patients report flushing, chest pressure, or nausea at higher infusion rates. Run on a slower drip for tolerability.

· Higher dose per session
· Multi-hour appointment
· Less frequent cadence
· Can produce more intense sensations

Not sure which fits? Most clients start with subcutaneous NAD+ injections and add or shift to IV based on response. Curious about the IV format specifically? Read the IV & shots page or bring it up at consult.

What To Expect

How NAD+ therapy works at Defiant.

Free Consultation

A provider reviews your goals, medical history, current medications, and any prior labs. NAD+ isn’t right for everyone — we’ll say so if it isn’t.

Tailored Protocol

Your provider recommends a delivery format (injection or IV), dose, and cadence based on the consult. Bloodwork-informed where relevant.

In-Clinic Delivery

Injections are quick. IVs are run at a slower drip rate for tolerability in our infusion space. A nurse stays with you for IV sessions.

Ongoing Review

Cadence and dose are adjusted as we track response over the first weeks. NAD+ integrates naturally with peptide, IV, and longevity protocols.

Who It’s For

Who tends to be a fit for NAD+.

Longevity-Focused Adults

Adults who want to be proactive about cellular health and are building a longevity stack alongside training, sleep, and nutrition.

Athletes In Recovery

Active clients stacking NAD+ alongside training, peptides, and IV recovery for mitochondrial and energy support.

Persistent Fatigue Post-Illness

Clients still feeling flat months after a viral illness, looking for protocols that may support mitochondrial recovery alongside their primary care plan.

Brain Fog & Mental Fatigue

Clients who feel mentally slower than they should, particularly when bloodwork doesn’t flag an obvious cause. NAD+ may help; we’ll set expectations honestly.

Who It’s NOT For

NAD+ is not appropriate for everyone. Pregnancy, breastfeeding, active cancer treatment, and certain medical conditions are reasons to hold off or pursue alternatives. Always discuss your full medical history and medication list with a provider before starting — that’s exactly what your free consultation is for.

FAQ

Common Questions

Everything you need to know about NAD+ therapy at Defiant in Lisle, IL — serving Naperville and Chicago’s western suburbs.

NAD+ stands for nicotinamide adenine dinucleotide. It’s a coenzyme present in every cell of your body and is essential for energy metabolism, DNA repair, and the activity of enzymes that maintain healthy cells. NAD+ levels naturally decline with age, which is one reason supplemental NAD+ protocols have drawn interest in longevity medicine.

Research suggests NAD+ supplementation may support cellular energy production, cognitive clarity, mitochondrial function, and DNA repair processes. Human evidence is still emerging, so we frame NAD+ as a potentially supportive tool rather than a guaranteed treatment for any specific condition. We’ll walk through what the data actually shows during your consultation.

Subcutaneous NAD+ injection protocols are typically more frequent and lower-dose than IV protocols. A common starting pattern is several injections per week for a loading phase, then a maintenance cadence based on response. Your provider will recommend a specific protocol at consultation.

Neither is universally better. NAD+ injections are lower-dose, faster, and easier to fit into a weekly routine. NAD+ IV delivers a higher dose in a single session but takes longer and can be more intense. The right choice depends on your goals, schedule, and tolerance — many clients start with injections and add IVs over time.

NAD+ is generally well-tolerated when delivered under medical supervision, but some people experience flushing, nausea, chest tightness, or injection-site reactions, particularly at higher doses. IV NAD+ is more likely to produce these sensations than subcutaneous injection, which is why we run IVs at a slower drip. Your provider will review your full medical history before starting any protocol.

Protocols are tailored to your goals — pricing is discussed during your free consultation. That way you can pick the format (injection or IV), dose, and cadence that fit your plan without guessing what you’re signing up for.

Defiant is located at 5100 Lincoln Ave, Lisle, IL 60532, serving Naperville, Downers Grove, Wheaton, Bolingbrook, Lombard, and the greater Chicago western suburbs. Easy access from I-88 and Route 53.

NAD+ is not FDA-approved as a treatment for any specific disease. It’s offered as a wellness and longevity-support therapy under medical supervision. Research is ongoing, and we present the evidence honestly rather than overstating outcomes.

Get Started

Considering NAD+ therapy?

Free consultation. We’ll walk through what the research supports, whether injection or IV is the better fit, and how NAD+ slots into the rest of your protocol. Bring your questions — we’ll be honest about what the evidence supports.