Nicotinamide adenine dinucleotide (NAD+) has emerged as a focus of longevity and wellness medicine due to its fundamental role in cellular metabolism and energy production. At Lambert Medical Practice in Surbiton, we offer NAD+ therapy with appropriate medical oversight, realistic expectations, and evidence-based protocols.
This article provides a balanced examination of NAD+ therapy—what the science shows, who may benefit, potential risks, and how it's administered safely. Serving patients across Kingston upon Thames and South-West London, we ensure NAD+ treatment is delivered with clinical rigour rather than unfounded hype.
Evidence-Based Approach
We acknowledge the evidence gap between animal research and human clinical trials. We do not claim NAD+ therapy definitively treats disease or reverses ageing, but offer it as an emerging therapy with theoretical rationale, administered under medical supervision for patients who understand current scientific limitations.
What is NAD+? Understanding the Science
Nicotinamide adenine dinucleotide (NAD+) is a coenzyme found in all living cells. It plays essential roles in fundamental biological processes including energy metabolism, DNA repair, cellular signalling, and gene expression. NAD+ exists in two forms: NAD+ (oxidised) and NADH (reduced), which interconvert during metabolic reactions.
NAD+'s Biological Functions
NAD+ is critical for multiple cellular processes. It is essential for glycolysis, the citric acid cycle, and the electron transport chain—the primary pathways by which cells generate ATP (cellular energy). Without adequate NAD+, cellular energy production is impaired.
NAD+ is a substrate for enzymes called PARPs (poly-ADP-ribose polymerases) that repair DNA damage. Cells with inadequate NAD+ may accumulate DNA damage, potentially accelerating ageing. NAD+ activates sirtuins, a family of proteins involved in cellular health, inflammation regulation, and metabolic homeostasis. Sirtuins have been linked to longevity in animal studies, though human evidence remains preliminary.
NAD+ Decline with Ageing
Research demonstrates that NAD+ levels decline with age across multiple tissues. By middle age, NAD+ concentrations may be 50% lower than in youth. Proposed mechanisms for this decline include increased consumption by DNA repair enzymes in response to accumulated damage, reduced synthesis due to declining precursor availability and enzyme activity, and increased breakdown by enzymes called CD38.
This decline has led researchers to investigate whether restoring NAD+ levels might counteract aspects of ageing or improve metabolic health. Animal studies show promising results, but human clinical evidence is still emerging.
Potential Benefits: What the Current Evidence Suggests
With appropriate caveats about evidence quality, current research suggests NAD+ therapy may offer benefits in specific contexts:
Energy and Fatigue
Given NAD+'s role in ATP production, it's biologically plausible that increasing NAD+ could improve cellular energy. Some patients report subjective improvements in energy levels and reduced fatigue following NAD+ therapy. However, placebo effects are substantial in fatigue studies, and objective evidence from controlled trials is limited.
NAD+ therapy should never replace proper investigation of fatigue causes. Before considering NAD+, we assess for anaemia, thyroid dysfunction, sleep disorders, depression, and other treatable conditions via comprehensive GP evaluation and blood testing.
Cardiovascular Health
Animal studies suggest NAD+ plays roles in cardiovascular function, endothelial health, and vascular adaptations to exercise. However, human clinical evidence is limited. People with established cardiovascular disease should discuss NAD+ therapy with their cardiologist.
Metabolic Health
Some animal and preliminary human research suggests NAD+ may support metabolic function and insulin sensitivity. However, human trials are small and results mixed. NAD+ therapy is never a substitute for lifestyle modifications (diet, exercise) that are proven effective for metabolic health.
Athletic Performance
Theoretical rationale exists for NAD+ supporting athletic performance through improved mitochondrial function and energy metabolism. However, robust human evidence is lacking. Athletes considering NAD+ should discuss with coaches and medical teams.
NAD+ Administration Methods
IV NAD+ Therapy
At Lambert Medical Practice, NAD+ is administered intravenously over 2-4 hours, allowing direct delivery into the bloodstream. This achieves higher blood concentrations than oral administration. Infusions are conducted under clinical supervision with continuous monitoring.
Oral NAD+ Precursors
Oral precursors like NMN (nicotinamide mononucleotide) and NR (nicotinamide riboside) are available and may increase NAD+ levels, though typically to lower concentrations than IV therapy. Absorption varies based on individual factors.
Safety and Contraindications
Most healthy adults tolerate NAD+ therapy well. Pre-treatment clinical assessment identifies contraindications including heart conditions, kidney disease, certain allergies, and pregnancy. Common side effects include abdominal cramping during infusion, nausea (managed by slowing infusion rate), chest tightness or anxiety (uncommon), headache, and flushing.
All treatments occur under clinical supervision with continuous monitoring. Our clinical team is trained in recognition and management of any complications.
Who May Benefit from NAD+ Therapy?
NAD+ therapy may be considered for adults experiencing persistent fatigue despite normal medical investigations, those seeking cellular health optimisation, athletes during heavy training periods, or individuals with specific conditions where NAD+ depletion is documented. It is not suitable for everyone and requires clinical screening before treatment.
Book Your NAD+ Consultation
Discuss whether NAD+ therapy is appropriate for your health goals at Lambert Medical Practice.
Book ConsultationThe Bottom Line on NAD+ Therapy
NAD+ represents an emerging field in longevity and wellness medicine with theoretical promise supported by animal research but limited human clinical evidence. At Lambert Medical Practice, we offer NAD+ therapy with appropriate medical supervision for patients who understand the current limitations of the science.
We do not make unfounded claims about disease treatment or miracle anti-ageing effects. Instead, we provide evidence-based information, thorough pre-treatment assessment, safe administration protocols, and realistic expectations about potential benefits and limitations.
If you're interested in NAD+ therapy or want to discuss whether it's appropriate for your circumstances, book a consultation with our clinical team. We'll provide honest assessment of the science, discuss your specific health goals, and help you make an informed decision about whether NAD+ therapy is right for you.
Key Takeaways
- NAD+ is a fundamental cellular coenzyme essential for energy production and cellular repair
- NAD+ levels decline with age, but human clinical evidence for therapy benefits is still emerging
- IV administration achieves higher blood concentrations than oral precursors
- Safety protocols and pre-treatment screening are essential
- Realistic expectations are critical—we do not claim disease treatment or anti-ageing miracles
- NAD+ therapy works best as part of comprehensive health strategy including lifestyle modifications