NAD+ IV Therapy: Combat Fatigue and Low Energy in Kent

NAD+ stands for nicotinamide adenine dinucleotide.

Every cell in your body contains it.

Your mitochondria use it to convert nutrients into usable energy in the form of ATP, and without adequate NAD+, that conversion slows. Cells are surrounded by fuel they cannot use. They starve in the presence of plenty.

I find this concept striking every time I explain it, because it reframes so much of what patients describe as ageing. The persistent fatigue that does not shift with sleep. The brain fog that has become the background hum of daily life. The metabolic changes that arrived without an obvious explanation.

These are not always the inevitable consequences of getting older. Sometimes they reflect a measurable biochemical deficit. And deficits can be addressed.

What NAD+ actually does

Published research identifies NAD+ as a coenzyme involved in over 500 enzymatic reactions across the body.

The scope of that is worth sitting with for a moment, because it explains why depletion has such wide-reaching consequences rather than affecting any single system in isolation.

The most fundamental role is in energy production. NAD+ is the essential electron carrier in mitochondrial oxidative phosphorylation, the process by which cells generate ATP from nutrients. Without adequate NAD+, mitochondrial function slows, ATP output drops, and cellular damage accumulates faster than it can be repaired. You experience this as fatigue that rest does not fix, reduced exercise capacity, and slower recovery from anything physically or mentally demanding.

Beyond energy, NAD+ activates sirtuins, a family of proteins that research confirms act as NAD+-dependent regulators of transcription, energy metabolism, cell survival, DNA repair, inflammation, and circadian rhythm. When NAD+ is abundant, sirtuins function properly. When it declines, their activity diminishes with it, and a significant portion of the cellular maintenance programme that keeps tissues healthy goes quiet.

The third major domain is DNA repair. PARP enzymes, poly-ADP-ribose polymerases, are your cells' primary repair mechanism for the thousands of small DNA errors and breaks that accumulate daily. They consume NAD+ to do this work. As NAD+ declines, PARP activity becomes substrate-limited. DNA damage accumulates. Cellular senescence increases. Tissues begin ageing faster biologically than they are ageing chronologically, and the gap between those two numbers is one of the things longevity medicine exists to narrow.

Metabolism, immune function, cardiovascular health, and cognition all depend on adequate NAD+ simultaneously. This is not a molecule targeting one pathway. It is the cellular currency that every system draws on at once, which is why its decline correlates with so many of the established hallmarks of ageing.

The decline, and why it matters more than most patients realise

NAD+ levels begin declining in early adulthood and do not stop. By around sixty, most people have roughly half the NAD+ of a healthy twenty-year-old. The decline is not linear: it accelerates when compounded by factors that drive additional consumption. Chronic inflammation burns through NAD+ at a high rate. UV exposure, alcohol, poor sleep, and the cumulative DNA damage that comes with ageing all increase PARP activation and deplete reserves faster than the baseline trajectory would predict.

I think about this constantly through the lens of my cardiac nursing years. In that environment, we worked with patients whose cardiovascular systems were struggling to deliver oxygen efficiently. The symptoms were systemic because the problem was systemic. Every organ downstream of an underperforming heart showed the strain in some way, often in ways that looked unconnected until you understood the underlying mechanism. NAD+ depletion is the intracellular equivalent of that picture. When the cellular energy currency runs low, every system that depends on it begins showing signs of underperformance, and the presentation looks like a collection of separate complaints rather than a single connected deficit.

A patient I saw earlier this year had been attributing her symptoms to perimenopause for two years. Fatigue. Cognitive dulling. Slower recovery from her regular exercise. She was forty-four, and while the hormonal picture was certainly contributing, her Advanced Blood Panel revealed markers consistent with significant cellular energy compromise. IV NAD+ therapy, alongside hormonal support, produced a response she described as the most significant shift in how she felt in three years. The biology was not mysterious. It was measurable, and it was addressable.

Recognising depletion: what it looks like in clinic

The symptom picture of NAD+ depletion overlaps significantly with what most people attribute to middle age, which is precisely why it goes unidentified and unaddressed for years.

Persistent fatigue is the most common presentation. Not ordinary tiredness that improves with rest, but cellular-level fatigue reflecting impaired ATP production. The tank feels perpetually low regardless of how much sleep a patient gets or how carefully they manage their lifestyle. When I hear this description, NAD+ status is consistently one of the first things I consider.

Cognitive dulling arrives next for many patients. Neurons are metabolically demanding cells with a high NAD+ requirement. Difficulty concentrating, slower processing, and the word-retrieval lapses that patients often attribute to stress or age often reflect neuronal energy insufficiency before any structural brain change has occurred. This distinction matters enormously in longevity medicine, because it points to an addressable cause rather than an irreversible one.

Recovery that has changed is another reliable signal. Exercise or illness that once required days to recover from now takes weeks. Cellular repair mechanisms that depend on NAD+ and PARP activity are working below capacity, and the body shows it in timelines that patients notice even if they cannot explain them.

The skin connection is the one that surprises patients most. Lower NAD+ impairs the collagen maintenance mechanisms and skin repair processes that depend on adequate cellular energy. When I see patients whose skin is not responding to regenerative treatments as strongly as expected, NAD+ status is one of the first systemic factors I consider. The collagen synthesis and fibroblast activity that treatments like Profhilo and polynucleotides depend on are downstream of cellular energy availability. Restore the energy substrate and the treatments work better.

Why IV delivery makes a clinical difference

Oral supplementation of NAD+ directly has real limitations. The molecule is poorly absorbed intact through the gastrointestinal tract. Oral precursors, NMN (nicotinamide mononucleotide) and NR (nicotinamide riboside), are a different matter and have a growing evidence base for raising cellular NAD+ levels via the salvage pathway. Many of my patients use them between sessions, and at Juvenology we stock HINNAO NMN specifically because its sublingual liposomal delivery achieves bioavailability that standard capsules cannot match.

But for therapeutic dosing, particularly for patients with significant depletion, systemic symptoms, or specific clinical goals, IV delivery provides something oral routes cannot: 100% bioavailability, immediate systemic distribution, and precise dose control. IV NAD+ therapy delivers 250 to 500mg of pharmaceutical-grade NAD+ directly into the bloodstream. Cells absorb it immediately for ATP production. Sirtuins activate. PARP-mediated DNA repair resumes. Systemic regulation begins to normalise.

At Juvenology, every infusion is conducted in a controlled clinical environment with vital signs monitored throughout. The infusion takes two to four hours depending on dose and individual tolerance. A warm flushing sensation is common and is managed by adjusting the rate. This is medical-grade treatment with clinical oversight at every stage, not a wellness drip, and the distinction matters for both safety and outcome.

Who should consider it and who should not

NAD+ therapy is most appropriate for patients experiencing persistent fatigue, poor recovery from exercise or illness, metabolic slowdown, cognitive dulling, or accelerating skin ageing that does not resolve with lifestyle optimisation alone. It is also well-suited to patients who want to be proactive about cellular health in the years before depletion becomes symptomatic, which is exactly the preventive thinking that longevity medicine is built around.

It sits within a comprehensive longevity strategy rather than standing as a standalone intervention. At Juvenology, NAD+ therapy is particularly powerful when informed by a thorough blood panel assessment that identifies the specific imbalances driving a patient's presentation rather than treating from assumption alone.

Most healthy adults are suitable candidates. Individuals with active cancer should discuss with their oncologist before proceeding, given theoretical concerns around NAD+ and tumour cell metabolism, though current evidence does not indicate a problem at physiological restoration doses. Pregnancy and breastfeeding are contraindications. A full medical history assessment at the first consultation identifies any individual considerations specific to you.

Frequently asked questions

What does IV NAD+ therapy feel like?

During the infusion, most patients notice a warm flushing sensation, occasionally accompanied by mild chest tightness or a feeling of pressure if the rate is too fast. These are normal physiological responses to NAD+ infusion, not adverse events, and the rate is adjusted throughout to keep you comfortable. Most patients leave feeling clearer and more energised than when they arrived, with the full effect building over the following days.

How quickly does it work?

Many patients notice improved clarity and energy within 24 to 48 hours of their first infusion, reflecting immediate cellular uptake and rapid activation of mitochondrial energy production. Systemic effects, improved sleep quality, better exercise recovery, and metabolic changes, typically develop over two to four weeks following a course of treatment.

How often do I need infusions?

For initial restoration in significantly depleted patients, a course of two to four infusions over two to four weeks is typical. Maintenance infusions every one to three months sustain elevated NAD+ levels thereafter. The appropriate frequency is determined at assessment based on symptom severity, baseline health, and individual response to initial treatment.

Is IV NAD+ better than oral NMN or NR supplements?

They serve different purposes rather than competing directly. Oral NMN and NR raise NAD+ via the salvage pathway and are appropriate for maintenance and prevention. IV NAD+ delivers the coenzyme directly into circulation with immediate bioavailability, bypassing the conversion process entirely. For significant depletion or specific clinical goals, IV delivery provides a therapeutic dose that oral precursors cannot match. Many patients use both, with oral NMN between IV sessions as a maintenance strategy, and this is the approach I recommend for patients who want sustained NAD+ pathway support rather than periodic acute restoration.

Is it safe?

NAD+ is an endogenous molecule: your body produces and uses it constantly, and replenishing it via infusion has a strong safety profile in the published literature. Common side effects during infusion, flushing, warmth, mild chest sensation, are transient and rate-dependent. At Juvenology, vital signs are monitored throughout every infusion, the rate is adjusted for individual tolerance, and a full medical history and assessment is completed before any infusion is agreed.

In cardiac nursing I learned that energy delivery is everything. When the system delivering oxygen and nutrients to cells fails, every downstream function suffers in ways that cascade through the whole body. NAD+ depletion operates on exactly the same principle, just at the intracellular level and over a longer timescale. Restoring it does not address fatigue or cognition or metabolism as separate problems. It restores the capacity of every system that depends on cellular energy to function as it was designed to. That is what longevity medicine is genuinely about, and it is why this treatment sits at the centre of what we do at Juvenology.

Book a NAD+ therapy consultation at Juvenology

We see patients from across Kent including Maidstone, Tonbridge, Sevenoaks, Kings Hill, West Malling, Medway, and Chatham.

References

1. NAD+ and sirtuins in ageing and disease — PMC: pmc.ncbi.nlm.nih.gov/articles/PMC4112140

2. Sirtuins and NAD+ in metabolic and cardiovascular diseases — PMC: pmc.ncbi.nlm.nih.gov/articles/PMC6206880

3. The NAD+/PARP1/SIRT1 axis in ageing — PubMed: pubmed.ncbi.nlm.nih.gov/28537485