Glutathione vs NAD+.
Quick Verdict
Glutathione is a antioxidant primarily researched for detoxification, antioxidant defense, immune support, skin brightening, while NAD+ is a longevity studied for cellular energy, dna repair, longevity.
Side-by-Side Analysis
| Dimension | Glutathione | NAD+ |
|---|---|---|
| Category | Antioxidant | Longevity |
| Mechanism | Glutathione is the body's master antioxidant — a tripeptide (glutamate-cysteine-glycine) present in every cell. | NAD+ is a critical coenzyme in every cell, essential for mitochondrial energy production (oxidative phosphorylation), DNA repair via PARP and sirtuin activation, and circadian rhythm regulation. |
| Half-Life | ~2 hours | ~4 hours |
| Route | SubQ | SubQ |
| Typical Dose | 200000–600000 mcg | 50000–200000 mcg |
| Frequency | 2-3x/week | Daily |
| Evidence Level | Strong | Strong |
| Indexed Studies | 20+ indexed | 20+ indexed |
| FDA Status | Research Only | Research Only |
| Lowest Price | $59.99 / 1500mg via Amino Club | — |
Mechanism of Action Comparison
How Glutathione Works
Glutathione Glutathione is the body's most important natural antioxidant, studied for detoxification, immune support, skin brightening, and protecting cells from oxidative damage throughout the body.
Glutathione is the body's master antioxidant — a tripeptide (glutamate-cysteine-glycine) present in every cell. It neutralizes reactive oxygen species, regenerates vitamins C and E, supports Phase II liver detoxification, and modulates immune cell function. Injectable GSH bypasses poor oral bioavailability.
How NAD+ Works
NAD+ NAD+ is a coenzyme essential for cellular energy and DNA repair that declines sharply with age, studied for restoring mitochondrial function and supporting longevity pathways.
NAD+ is a critical coenzyme in every cell, essential for mitochondrial energy production (oxidative phosphorylation), DNA repair via PARP and sirtuin activation, and circadian rhythm regulation. Levels decline ~50% between ages 40-60, contributing to metabolic dysfunction and aging.
Key Mechanistic Difference
Glutathione operates as a antioxidant, while NAD+ functions as a longevity — these are fundamentally different pharmacological approaches.
Research Evidence
Glutathione
20 studies- Glutathione: overview of biosynthesis, regulation, and clinical roleForman et al. (Mol. Aspects Med.): Comprehensive review of glutathione's role in redox signaling, detoxification, and it…Strong
- Glutathione and immune functionDröge & Breitkreutz (Proc. Nutr. Soc.): Review demonstrating glutathione's critical role in lymphocyte proliferation, NK…Moderate
- Glutathione for skin lightening: randomized controlled trialWeschawalit et al. (Clin. Cosmet. Investig. Dermatol.): RCT showing oral glutathione supplementation significantly reduc…Moderate
NAD+
20 studies- NAD+ decline is a driver of agingRajman et al. (Cell Metabolism): Comprehensive review demonstrating NAD+ decline as a hallmark of aging, with restoratio…Strong
- NAD+ repletion improves mitochondrial and stem cell functionZhang et al. (Science): NAD+ supplementation restores mitochondrial function in aged mice, improving muscle stem cell fu…Preclinical
- CD38 dictates age-related NAD decline and mitochondrial dysfunctionCamacho-Pereira et al. (Cell Metabolism): Identifies CD38 as the primary NAD-consuming enzyme that increases with age, e…Preclinical
Vendor Pricing
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Frequently Asked Questions
Can I take Glutathione and NAD+ together?▼
Yes — Glutathione and NAD+ are identified as synergistic in interaction databases. They operate through complementary mechanisms and are commonly combined in research protocols.
Which has more research evidence — Glutathione or NAD+?▼
Glutathione has 20 indexed studies (highest evidence: Strong). NAD+ has 20 indexed studies (highest evidence: Strong). Both have comparable research coverage.
Which is better for longevity — Glutathione or NAD+?▼
Both are researched for longevity. Glutathione addresses this via detoxification, antioxidant defense, immune support, skin brightening. NAD+ approaches it through cellular energy, dna repair, longevity. The optimal choice depends on your specific research protocol and which mechanism aligns with your objectives.
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Research Use Only — Not Medical Advice
This comparison is provided for educational and research purposes only. It does not constitute medical, prescribing, or treatment advice. Clinical data cited here is sourced from published peer-reviewed trials and FDA labels. Consult a qualified healthcare professional before making any decisions about medications or research compounds. PeptiDex is an informational resource and does not sell pharmaceutical products.