NAD+
NAD+
NAD+ is a coenzyme present in every cell that plays a central role in energy production, DNA repair and cellular ageing — and its levels decline significantly with age. Human clinical research published in Science (2021) demonstrated that restoring NAD+ levels significantly improved skeletal muscle insulin sensitivity and mitochondrial function in study participants. Research by leading longevity scientists has identified NAD+ restoration as one of the most scientifically validated strategies in metabolic health and healthy ageing research.
Supplied as research-grade powder. Available in 500mg and 1000mg formats. For research purposes only.
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Curated combinations based on what researchers actually stack — backed by published data, priced to save.
Stack with NAD+
Why researchers stack these
- 01Three age-declining compounds — combined restoration
- 02Antioxidant protection during heightened metabolism
- 03Structural repair completes the longevity stack
Full research context
NAD+ restores sirtuin and PARP function — essential for mitochondrial biogenesis and DNA repair, both of which decline significantly with age. MOTS-c, the mitochondria-derived peptide, activates AMPK signalling and declines alongside NAD+ on a parallel age-related trajectory; combined restoration is the most researched longevity intervention. Glutathione provides the antioxidant protection that active cellular metabolism demands. GHK-Cu extends the protocol into structural repair, supporting the collagen and extracellular matrix integrity that declines alongside cellular energy.
Recovery & Repair Protocol
The most studied peptide combination for tissue repair, injury recovery & musculoskeletal healing
Why researchers stack these
- 01Non-competing structural repair pathways
- 02BPC-157 angiogenesis + TB-500 satellite cell activation
- 03GHK-Cu adds the extracellular matrix layer both lack
Full research context
BPC-157 and TB-500 are the two most frequently co-researched repair peptides in published literature, acting through complementary mechanisms — BPC-157 via nitric oxide pathways and angiogenesis, TB-500 via actin-sequestering and satellite cell activation. GHK-Cu rounds out the stack by supporting collagen synthesis and the extracellular matrix that both compounds do not directly address, while reducing the oxidative load that slows tissue recovery.
Metabolic & Body Recomposition
Most popular Peptide Pal stack — two non-competing fat loss axes with skin integrity support
Why researchers stack these
- 01GLP-1 triple agonism + GH axis — two distinct fat loss pathways
- 02Skin integrity preserved throughout recomposition
- 03Most purchased together on Peptide Pal
Full research context
Retatrutide and Tesamorelin address body composition through two non-competing mechanisms. Retatrutide's triple receptor agonism drives broad metabolic improvement and appetite regulation; Tesamorelin is FDA-approved for visceral adipose reduction through the growth hormone axis — a distinct mechanism. GHK-Cu supports skin integrity during recomposition; rapid fat loss without collagen support produces visible skin laxity that is far harder to address after the fact.
Cognitive Performance Stack
Neuropeptides studied for synergistic cognitive enhancement, focus & stress resilience — no sedation
Why researchers stack these
- 01BDNF stimulation balanced by GABA modulation
- 02Focus without anxiety — three non-competing pathways
- 03NAD+ fuels the neuronal energy demand
Full research context
Semax and Selank are registered pharmaceuticals with distinct mechanisms. Semax drives BDNF upregulation and cortical processing speed; Selank reduces the stress-induced cognitive interference that can blunt that effect, without sedation or dependency. NAD+ provides the cellular energy substrate that enhanced neuronal activity demands — researchers consistently report that this combination delivers balanced cognitive performance that neither compound achieves alone.
Skin & Glow Protocol
Collagen synthesis, antioxidant protection & melanin research in one comprehensive skin stack
Why researchers stack these
- 01Collagen, antioxidant & pigmentation — three skin pillars
- 02Tyrosinase inhibition counterbalances MC1R agonism for pathway research
- 03Structural integrity maintained alongside brightening
Full research context
GHK-Cu stimulates collagen synthesis and modulates over 4,000 genes involved in skin repair and inflammatory control — addressing the structural layer. Glutathione reduces oxidative stress and inhibits tyrosinase, producing measurable skin brightening with 30–35% tissue GSH increases confirmed in human RCTs. MT2 drives eumelanin synthesis via MC1R agonism, and researchers frequently combine it with Glutathione to study the interplay between melanocortin-driven pigmentation and tyrosinase inhibition simultaneously. Together these three represent the most comprehensive skin research protocol available.
Cellular Longevity Protocol
Three compounds that decline together with age — combined restoration for mitochondrial & cellular health
Why researchers stack these
- 01All three decline together with age — parallel restoration
- 02Mitochondrial energy, AMPK signalling & antioxidant protection
- 03Most complete cellular longevity protocol available
Full research context
NAD+, MOTS-c, and glutathione all decline measurably with age through parallel but distinct pathways. NAD+ restores sirtuin and PARP function essential for mitochondrial biogenesis and DNA repair — declining up to 50% by age 60. MOTS-c is the mitochondria-derived peptide that activates AMPK signalling and declines alongside NAD+; their combined restoration is the most researched longevity intervention. Glutathione provides the antioxidant protection that prevents cellular damage during the heightened metabolic activity that NAD+ and MOTS-c restoration drives — completing what researchers describe as the foundational cellular longevity triad.
Research & Studies
Peer-reviewed research supporting NAD+
NAD+ Precursor Supplementation Improves Muscle Insulin Sensitivity in Human Participants
In the first human randomised controlled trial demonstrating metabolic benefits of NAD+ precursor supplementation, 25 postmenopausal women with prediabetes received NMN — a direct NAD+ precursor — for 10 weeks. NMN significantly increased skeletal muscle NAD+ levels, enhanced muscle insulin sensitivity measured by hyperinsulinaemic-euglycaemic clamp, and upregulated expression of genes involved in muscle remodelling and mitochondrial function. These findings in humans directly support the mechanistic role of NAD+ depletion in insulin resistance and the translational relevance of NAD+ restoration for metabolic health in ageing adults.
NAD+ Boosting as a Therapeutic Strategy: Mechanisms, Ageing and Disease Implications
This landmark review established the scientific consensus that NAD+ levels decline significantly with age in multiple human tissues, directly impairing sirtuin and PARP enzyme function that are essential for DNA repair, mitochondrial biogenesis, and cellular stress resistance. NAD+ restoration via precursor supplementation was shown to reverse multiple hallmarks of ageing in biological models, improving energy metabolism, cognitive function, and metabolic homeostasis. The authors identified NAD+ depletion as a unifying mechanism linking ageing with metabolic disease, neurodegeneration, and reduced physical capacity — positioning NAD+ restoration as one of the most scientifically validated longevity research strategies.