Learn about the benefits of chiropractic restoration for metabolic health and how it supports your body’s natural healing processes.
Abstract
In this educational post, I share clear, evidence-based insights on how NAD+—a foundational cellular coenzyme—supports mitochondrial health, energy production, inflammation control, and cellular resilience. Drawing on modern research on NAD+ biology and related pathways, I explain how restoring NAD+ pools has been linked in preclinical models to reduced atherosclerotic features, improved cardiac function in dilated cardiomyopathy, better metabolic flexibility in insulin resistance, and neuroprotection in Alzheimer’s disease models through SIRT3 activation and mitochondrial restoration. I also describe how our multidisciplinary team at Injury Medical Clinic PA (also known as Mission Plaza Injury Medical Clinic) in El Paso, Texas—led medically by Dr. Maria Guadalupe Cardenas, MD (Board Certified in Internal Medicine) (NPI #1164426749, Texas MD License #J2933)—collaborates across chiropractic care, internal medicine, functional medicine, rehabilitation, and personal injury care. You will learn the physiological underpinnings of NAD+ biology, why mitochondrial function sits at the root of the chronic disease triad of inflammation, insulin resistance, and energy depletion, and how integrative chiropractic care synergizes with internal medicine oversight in non-surgical treatment approaches. This content is based on clinical synthesis and reworded for clarity and accessibility as a website educational resource.
Our Multidisciplinary Care Model at Injury Medical Clinic PA in El Paso
At Injury Medical Clinic PA in El Paso, Texas, we build care as a collaborative, evidence-informed, patient-centered process. Dr. Maria Guadalupe Cardenas, MD (Board Certified in Internal Medicine) (NPI #1164426749, Texas MD License #J2933), with over 40 years of experience as an internist, serves as our Medical Director and Collaborative Physician. In this role, she provides medical oversight, ensuring diagnostic clarity, medication safety, and alignment with internal medicine standards. This multidisciplinary setup is common in integrative or injury care clinics, where a chiropractor works alongside an MD who provides medical direction.
I, Dr. Alex Jimenez, DC, APRN, FNP-BC, CFMP, IFMCP, ATN, CCST, lead our chiropractic and functional medicine initiatives. Our integrative chiropractic care extends beyond spinal adjustments. We assess biomechanics, posture, and movement patterns. We modulate the somatic-autonomic interface that influences neuromuscular tone and neuroimmune signaling. We coordinate with rehabilitation specialists. We integrate functional medicine labs and protocols addressing root contributors such as mitochondrial dysfunction, nutritional deficits, and inflammatory drivers. We support personal injury recovery with precision diagnostics and evidence-based rehabilitation plans under medical oversight.
This model improves diagnostic accuracy, safety, and therapeutic breadth for complex conditions influenced by metabolic and neuroimmune factors. Patients receive coordinated non-surgical care that addresses both structural and cellular drivers of symptoms.
The Cellular Toolkit: Why NAD+ Is Foundational to Health
Your body runs thousands of chemical reactions per second in each cell. These reactions require enzymes—specialized proteins that act as biological catalysts—to proceed efficiently at body temperature. Enzymes need coenzymes to function. A coenzyme is a helper molecule that binds to an enzyme and enables the reaction. Without coenzymes, the enzyme stalls. Picture a skilled worker arriving at a construction site without tools. The skill is present, yet nothing gets built. That is how enzymes operate without their coenzymes.
Among coenzymes, NAD+ (nicotinamide adenine dinucleotide) stands out as critical across biological systems. NAD+ is the universal toolkit for cells. It participates in redox reactions, shuttling electrons through the mitochondrial electron transport chain. This enables cells to produce ATP, the energy currency of life. When NAD+ is insufficient, the electron transport chain falters, ATP production drops, and energy-dependent systems—heart, brain, muscles, and immune network—begin to show strain.
Adequate NAD+ supports several core processes. It sustains mitochondrial respiration and ATP generation. It helps maintain redox balance and antioxidant defenses. It activates sirtuins, especially SIRT1 and SIRT3, which improve stress responses, DNA repair, and metabolic efficiency. It supports cellular maintenance pathways including autophagy and mitophagy. It contributes to insulin sensitivity and glucose homeostasis. It aids neuroprotection by reducing mitochondrial oxidative stress and enhancing bioenergetics.
When NAD+ levels are restored through dietary precursors or other strategies under medical supervision, cascading benefits can appear across systems. Research continues to explore how targeted NAD+ support modulates processes underlying chronic disease. The story of NAD+ is the story of cellular resilience.
Cardiac Resilience: NAD+ Mitochondria and Vascular Health
Your heart beats nearly 100,000 times per day. It is one of the most metabolically active organs and depends on uninterrupted mitochondrial function to meet ATP demands. Significant disruptions in mitochondrial function can lead to energy shortfalls, oxidative stress, and, over time, structural or functional changes.
Atherosclerosis shows how metabolism and inflammation converge. Plaques form as lipids, immune cells, and fibrous material accumulate in arteries. Inflammatory content within plaques often predicts instability. Research on NAD+ pathways has examined these processes. For example, studies of NAD+ precursors such as nicotinamide riboside (NR) and related compounds in animal models have explored effects on plaque features, endothelial function, and inflammation. One line of work showing leukocyte-specific increases in intracellular NAMPT (an enzyme in the NAD+ salvage pathway) linked these increases to attenuated plaque burden and lesion stabilization in low-density lipoprotein receptor-deficient mice, associated with shifts toward anti-inflammatory macrophage phenotypes and reduced chemotaxis (Bermudez et al., 2017). Other work has examined the effects of NR or nicotinamide mononucleotide on aortic inflammation and oxidative stress in high-fat diet models. Findings vary across doses and models; some high-dose precursor studies report neutral or even increased plaque measures under certain conditions, underscoring the need for careful interpretation and medical oversight.
Dilated cardiomyopathy involves cardiac muscle weakness with chamber dilation. Preclinical research has shown that NAD+ precursor supplementation can support cardiac function. In a mouse model of dilated cardiomyopathy, NR supplementation in food attenuated heart failure development by stabilizing myocardial NAD+ levels, with stronger effects in dilated cardiomyopathy than in pressure-overload models (Diguet et al., 2018). Mechanistically, this aligns with replenishing cardiomyocyte NAD+ pools, supporting electron transport chain throughput and ATP generation, reducing reactive oxygen species, improving mitochondrial quality control via sirtuin activity, and aiding calcium handling and contractile efficiency.
These findings remind us that energetic shortfalls are not fixed destinies. When integrated carefully, targeted metabolic support can contribute to cardiac resilience. In our clinic, we consider NAD+-oriented strategies only under Dr. Cardenas’s medical oversight, with baseline cardiovascular assessment, monitoring, and alignment to the individual patient’s history and medications.
Metabolic Health NAD+ Insulin Sensitivity and Type 2 Diabetes
Type 2 diabetes is often framed primarily as a glucose problem. In functional and integrative settings, it is also viewed as a mitochondrial problem that manifests as metabolic dysregulation. At the root of insulin resistance are disrupted mitochondrial redox balance, impaired ATP signaling, and elevated reactive oxygen species that can damage membrane receptors and signaling proteins.
When NAD+ is low, the electron transport chain can stall. ATP production declines. Pancreatic beta-cell glucose sensing may become less reliable. Insulin receptor signaling can become noisier. Reactive oxygen species accumulate and fuel inflammatory cascades that worsen insulin resistance.
Human and preclinical data on NAD+ precursors show variable results. Some studies of oral nicotinamide riboside in obese men found no improvement in insulin sensitivity after 12 weeks (Dollerup et al., 2018). In contrast, a trial of nicotinamide mononucleotide in postmenopausal women with prediabetes reported about a 25 percent improvement in muscle insulin sensitivity after 10 weeks, comparable to the effect of modest weight loss in some contexts (Yoshino et al., 2021). Preclinical work has linked NAD+ restoration to improved glucose handling, reduced inflammation, and better metabolic flexibility through sirtuin pathways and lipid oxidation.
In our integrated model, we combine any NAD+-centric strategies with chiropractic care, graded rehabilitation exercise, anti-inflammatory dietary patterns, and targeted nutrients, all monitored under internal medicine oversight. The goal is sustainable metabolic momentum, not isolated biochemical changes. Why pair these? Because movement efficiency, autonomic balance, and reduced nociceptive stress lower the overall energetic and inflammatory load, allowing restored cellular capacity to be used more effectively.
Brain Health NAD+ SIRT3 and Alzheimer’s Disease
There is discussion equating Alzheimer’s disease to “type 3 diabetes” because of brain insulin signaling impairment. This analogy captures metabolic aspects, yet Alzheimer’s more fundamentally involves mitochondrial dysfunction at the neuronal level. When mitochondria falter, reactive oxygen species rise, proteins sustain oxidative damage, and stress responses increase, including altered amyloid precursor protein processing. Amyloid accumulation may reflect downstream cellular emergency programs rather than the sole upstream driver.
Multiple studies point to NAD+ and sirtuin pathways as leverage points. A 2018 study in a DNA-repair-deficient Alzheimer’s mouse model showed that nicotinamide riboside supplementation normalized the cerebral NAD+/NADH ratio, lessened phosphorylated tau pathology, reduced DNA damage and neuroinflammation, increased SIRT3 activity, improved cognitive function, and restored hippocampal synaptic plasticity (Hou et al., 2018). SIRT3, a mitochondrial sirtuin, deacetylates key antioxidant and metabolic enzymes, fortifying mitochondria against stress. Other work links reduced SIRT3 to amyloid-related hypometabolism and neuronal vulnerability, and overexpression or pathway support can rescue aspects of mitochondrial function and ATP production.
Supporting NAD+ can help re-establish neuronal homeostasis by elevating the NAD+/NADH ratio, activating SIRT3 and related maintenance pathways, reducing reactive oxygen species burden, enhancing synaptic plasticity and neurovascular coupling, and supporting microglial homeostasis. In our clinic, these insights inform integrative brain health strategies that combine NAD+-oriented protocols (when appropriate and supervised) with anti-inflammatory nutrition, targeted physical therapy for neurovascular function, sleep optimization, stress modulation, and chiropractic care to normalize autonomic tone—all under medical supervision.
Chronic Disease Convergence: Inflammation, Insulin Resistance, and Energy Failure
When stepping back from individual diagnoses, a clear pattern emerges. Chronic diseases converge on a triad of systemic inflammation, insulin resistance, and mitochondrial dysfunction. Tightly bound to that triad are energy depletion, reduced NAD+ availability, and failures in cellular maintenance systems such as autophagy and mitophagy. When maintenance programs go offline, cells accumulate damaged proteins and organelles, signaling becomes chaotic, and tissue performance declines. Over time, repair deficits translate into cell stress and organ-level dysfunction.
NAD+ helps reconnect these circuits. Elevating NAD+ allows mitochondria to restore electron-transfer capacity and increase ATP production. Sirtuins orchestrate adaptive responses including DNA repair, stress tolerance, and metabolic control. Inflammatory signaling is dampened through enhanced antioxidant capacity and improved redox balance. Insulin sensitivity stabilizes as cellular energy state and receptor integrity improve. Autophagy and mitophagy resume, allowing the cell to recycle damaged components.
This is why we continue to explore NAD+ scaffolds within comprehensive clinical programs. While NAD+ support is not a panacea, it often functions as a keystone. When placed correctly within lifestyle, rehabilitation, and medical frameworks, it can improve overall structural integrity.
How We Integrate NAD+-Oriented Strategies with Chiropractic Internal Medicine and Functional Medicine
Success of any NAD+-centered approach depends on rigorous integration. Medical oversight with Dr. Cardenas includes reviewing eligibility based on history, comorbidities, and medications; ordering baseline labs such as a metabolic panel, HbA1c, fasting insulin, lipid profile, and CRP or hs-CRP; monitoring cardiovascular and neurological status; coordinating imaging or referrals as needed; and ensuring safety around drug-nutrient interactions.
Chiropractic integration applies spinal and extremity adjustments to optimize biomechanical efficiency and autonomic balance. Soft tissue therapies, myofascial release, and joint mobilization reduce nociceptive signaling that can overload the stress axis. Neuromuscular reeducation and breathing training improve vagal tone and heart rate variability. Graded rehabilitation exercise enhances mitochondrial biogenesis via pathways such as PGC-1? activation.
Functional medicine alignment tailors mitochondrial nutrition with adequate protein, B vitamins, magnesium, alpha-lipoic acid, CoQ10, omega-3s, and polyphenols. Sleep optimization and circadian alignment support NAD+ synthesis by regulating NAMPT and promoting melatonin-mediated mitochondrial protection. Stress reduction protocols normalize cortisol and catecholamine profiles that otherwise impair insulin sensitivity. If gut factors or sensitivities are identified, elimination or anti-inflammatory dietary approaches are used.
Rehabilitation synergy uses periodized exercise that emphasizes an aerobic base, intervals to build metabolic flexibility, and resistance training to upregulate mitochondrial density. Balance and proprioception training support neurovascular coupling. Therapy doses are aligned to avoid overtraining during early restoration phases.
Together, these pillars create a resilient scaffold for patients moving from energy shortfall toward greater energetic sufficiency. Why each element? Because chronic disease is multi-system. Isolated biochemical support without addressing biomechanics, autonomic load, nutrition, and recovery leaves residual drivers of NAD+ consumption (for example, via PARP activation from ongoing oxidative or inflammatory stress).
Physiological Underpinnings: Why NAD+-Related Strategies Can Change Outcomes
Understanding the physiology helps patients see why these interventions aim at fundamentals rather than symptoms alone.
A high NAD+/NADH ratio favors oxidative metabolism, enabling efficient electron transport chain function. Low ratios indicate reductive stress, often linked to impaired respiration and elevated reactive oxygen species.
Sirtuins (SIRT1, SIRT3) depend on NAD+ as a substrate. When NAD+ rises, sirtuin activity increases. SIRT1 modulates metabolism, inflammation, and circadian biology. SIRT3 localizes to mitochondria and deacetylates enzymes such as MnSOD and electron transport chain components, improving antioxidant capacity and respiration.
PARPs are DNA repair enzymes that consume NAD+ when genomic damage activates them. Excess PARP activity during oxidative stress can deplete NAD+, impairing energy production. Reducing upstream drivers of DNA damage or inflammation therefore preserves NAD+ pools.
AMPK senses energy stress and promotes fatty acid oxidation, glucose uptake, and mitochondrial biogenesis. mTOR regulates growth. Balancing AMPK/mTOR signaling supports autophagy and repair. NAD+-dependent pathways help clear damaged proteins and mitochondria. When these processes function well, they preserve cellular homeostasis.
By supporting NAD+ availability, these networks can improve simultaneously. As the body regains intrinsic maintenance capacity, clinical changes such as lower CRP, improved glycemic markers, increased exercise tolerance, or clearer cognition can materialize.
Clinical Pathways Decision Points and Protocol Rationale
Our protocols emphasize safety and individualization. Eligibility evaluation includes cardiometabolic assessment, screening for renal and hepatic function given metabolic demands, and review of medications (anticoagulants, anti-diabetics, antihypertensives) for interaction considerations.
Any NAD+ or precursor strategy begins conservatively to assess tolerance (possible transient flushing, mild headache, or injection-site effects with certain routes). Adjust dosing gradually based on symptom tracking and biomarkers, always under internal medicine oversight. Adjunct precursors may be considered when appropriate.
Monitoring tracks CRP or hs-CRP, fasting insulin, HbA1c, lipids, liver enzymes, and kidney function. Noninvasive autonomic markers include heart rate variability and resting heart rate. Functional tests include timed walks, grip strength, gait analysis, and relevant cognitive screening tools.
Rehabilitation and chiropractic coordination adjust exercise intensity to metabolic tolerance. Adjustments help normalize autonomic balance and reduce pain-related stress. Breathing drills and mindfulness reduce sympathetic overdrive.
Nutrition and lifestyle support anti-inflammatory patterns that emphasize polyphenols, omega-3s, and fiber. Support sleep with light hygiene, temperature regulation, and consistent schedules. Time-restricted eating may be considered where appropriate to support metabolic flexibility and NAD+ rhythms.
Why Integrative Chiropractic Care Belongs in NAD+-Centered Non-Surgical Programs
Chiropractic care is sometimes framed narrowly as mechanical adjustment. In our practice, it functions as a neuroimmune and metabolic intervention tool within non-surgical care.
Pain and dysfunctional biomechanics increase sympathetic drive, elevating cortisol and catecholamines that worsen insulin resistance and mitochondrial stress. Chiropractic adjustments can reduce nociceptive input, normalize segmental facilitation, and improve vagal tone, often reflected in better heart rate variability. Efficient posture and joint motion reduce the metabolic cost of movement, supporting oxygen utilization and ATP efficiency. Soft tissue and joint interventions may modulate pro-inflammatory cytokines via mechanotransduction. As inflammatory burden drops, PARPs consume less NAD+, preserving energy balance. Corrective and mobility training support mitochondrial biogenesis through repeated mild stress, priming the body to utilize restored capacity effectively.
This integrative approach makes cellular support part of a coordinated effort to reclaim energy and restore systemic resilience rather than an isolated intervention.
Case Informed Observations from Clinical Practice
Clinical observations and professional insights from the Personal Injury Doctor Group (https://personalinjurydoctorgroup.com/) show that metabolic restoration intersects with injury recovery in practical ways. Patients with whiplash or postural strain often present with autonomic dysregulation, sleep disturbances, and cognitive fog. In practice, combining chiropractic neuromuscular reeducation, breathing training, sleep optimization, and NAD+-supportive nutrition has been associated with improved heart rate variability, fewer headaches, and greater clarity. Post-concussive recovery involves elevated neuroinflammation and oxidative stress; alongside medical evaluation and careful rehab pacing, nutritional and cellular support strategies help stabilize neuronal metabolism while vestibular and oculomotor work progresses. Individuals with musculoskeletal injury plus metabolic comorbidity (obesity or type 2 diabetes) often experience slower tissue healing; integrating glycemic control protocols, targeted rehabilitation, and chiropractic adjustments supports more sustainable pain reduction and functional gains.
These observations reinforce multidisciplinary care. We pair clinical pattern recognition with rigorous monitoring and adapt protocols to patient responses. Detailed case discussions and practice insights appear on the Personal Injury Doctor Group site.
Safety Ethics and Evidence Guardrails
Clinical responsibility balances innovation with caution. Patients receive education about rationale, potential benefits, and possible risks. Informed consent is documented. Medical oversight by Dr. Cardenas aligns interventions with internal medicine standards. Potential side effects are discussed and dosing adjusted. We evaluate progress with biomarkers and functional measures. If outcomes plateau or adverse events arise, protocols are recalibrated. Interventions sit within comprehensive care that includes nutrition, sleep, stress management, rehabilitation, and chiropractic. NAD+-oriented strategies are positioned as part of a systems approach, not a standalone solution. Direct human evidence for certain routes remains limited and evolving; decisions are individualized.
From Research to Practice: Translational Considerations
Bringing research into the clinic requires synthesis and adaptation. We evaluate study design, sample sizes, controls, endpoints, and relevance to our population. We assess biological plausibility against known physiology. We pilot protocols conservatively, monitor them, and adapt them to patient-specific variables. We emphasize patient-centered outcomes—pain reduction, functional capacity, cognitive clarity, metabolic improvements, and quality of life. This translational approach lets us safely leverage advances in NAD+ science within non-surgical integrative care.
Practical Guide: Implementing NAD+-Supported Integrative Care
A simplified sequence includes baseline assessment (history, medication review, labs, physical exam of posture and range of motion, neurologic screen, function tests). Foundational lifestyle stabilization follows with anti-inflammatory nutrition, sleep hygiene, and stress management. Any NAD+ strategy is introduced conservatively under oversight, with tolerance monitoring. Chiropractic and rehabilitation integration optimizes mechanics, autonomic function, and progressive exercise. Functional medicine enhancements add targeted nutrients and address gut or hormonal factors if indicated. Ongoing monitoring and adaptation include rechecking labs, updating exercise and manual therapies, and documenting patient-reported outcomes.
Patient Themes: Energy Restoration in Real Lives
Individual results vary. Common themes include improved clarity and stamina in those with persistent fatigue and brain fog when they consistently follow sleep and stress programs. Cardiometabolic patients may show gradual gains in exercise tolerance, heart rate recovery, and inflammatory markers. Those with chronic musculoskeletal pain often experience better pain control and movement economy when chiropractic care reduces autonomic stress alongside cellular energy support. These changes reflect biochemical adjustments plus psychosocial gains such as renewed confidence and reduced health anxiety.
Addressing Common Questions
Is NAD+ support a cure-all? It is powerful coenzyme support that often potentiates other interventions. We use it as part of an integrated plan under medical direction.
Who may not be appropriate? Certain comorbidities or medication interactions may exclude or require modified protocols. Internal medicine oversight is essential.
How long before changes appear? Some patients notice subtle shifts within weeks. More durable metabolic and cognitive improvements typically develop over months when lifestyle and rehabilitation components are consistent.
What is the role of chiropractic care? It helps normalize autonomic tone, reduce pain-related stress, and improve movement efficiency, all of which synergize with metabolic restoration.
Looking Forward: Precision and Integrated Metabolic Care
Emerging biomarkers and technologies will continue to refine how we deploy NAD+-related strategies. Precision profiling can help tailor care for individual variability in sirtuin responsiveness, redox balance, and mitochondrial dynamics. Our commitment remains rigorous medical oversight, cross-disciplinary integration, continuous evaluation of patient-centered outcomes, and patient education so the “why” behind every intervention is clear.
Closing Thoughts
I share this educational content to empower patients. When integrative, non-surgical methods support cellular energy, reduce inflammation, and align systems, people often improve. NAD+-related strategies are among the strongest levers for mitochondrial restoration. When coordinated with chiropractic care, internal medicine oversight, functional nutrition, and targeted rehabilitation, they can help reset trajectories that once seemed fixed. Our clinic stands ready to guide this journey safely and effectively, pairing innovation with the fundamentals of good medicine and compassionate care.
References
- Bermudez, B., Dahl, T. B., Medina, I., Groeneweg, M., Holm, S., Montserrat-de la Paz, S., … & Biessen, E. A. (2017). Leukocyte overexpression of intracellular NAMPT attenuates atherosclerosis by regulating PPAR?-dependent monocyte differentiation and function. Arteriosclerosis, Thrombosis, and Vascular Biology, 37(6), 1157–1167. https://doi.org/10.1161/ATVBAHA.116.308187
- Diguet, N., Trammell, S. A. J., Tannous, C., Deloux, R., Piquereau, J., Mougenot, N., … & Mericskay, M. (2018). Nicotinamide riboside preserves cardiac function in a mouse model of dilated cardiomyopathy. Circulation, 137(21), 2256–2273. https://doi.org/10.1161/CIRCULATIONAHA.116.026099
- Dollerup, O. L., Christensen, B., Svart, M., Schmidt, M. S., Sulek, K., Ringgaard, S., … & Jessen, N. (2018). A randomized placebo-controlled clinical trial of nicotinamide riboside in obese men: Safety, insulin-sensitivity, and lipid-mobilizing effects. The American Journal of Clinical Nutrition, 108(2), 343–353. https://doi.org/10.1093/ajcn/nqy132
- Hou, Y., Lautrup, S., Cordonnier, S., Wang, Y., Croteau, D. L., Zavala, E., … & Bohr, V. A. (2018). NAD+ supplementation normalizes key Alzheimer’s features and DNA damage responses in a new AD mouse model with introduced DNA repair deficiency. Proceedings of the National Academy of Sciences, 115(8), E1876–E1885. https://doi.org/10.1073/pnas.1718819115
- Jimenez, A. (n.d.). Personal Injury Doctor Group. https://personalinjurydoctorgroup.com/
- Jimenez, A. (n.d.). LinkedIn profile. https://www.linkedin.com/in/dralexjimenez/
- Yoshino, M., Yoshino, J., Kayser, B. D., Patti, G. J., Franczyk, M. P., Mills, K. F., … & Klein, S. (2021). Nicotinamide mononucleotide increases muscle insulin sensitivity in prediabetic women. Science, 372(6547), 1224–1229. https://doi.org/10.1126/science.abe9985
SEO tags
NAD+, NAD plus, mitochondria, ATP, sirtuins, SIRT3, electron transport chain, oxidative stress, inflammation, insulin resistance, type 2 diabetes, Alzheimer’s disease, cardiomyopathy, atherosclerosis, neuroprotection, chiropractic care, internal medicine, functional medicine, rehabilitation, personal injury care, El Paso Texas, Injury Medical Clinic PA, Mission Plaza Injury Medical Clinic, Dr Maria Guadalupe Cardenas MD, Dr Alex Jimenez DC
Disclaimer: This educational post provides a comprehensive narrative journey through NAD+ biology and its integration into non-surgical multidisciplinary care. All content is for educational purposes and does not constitute medical advice. Consult qualified healthcare professionals for personalized decisions.
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