NAD+ vs glutathione: different jobs, different research materials
Research context reviewed 16 October 2026NAD+ helps transfer electrons in the chemistry behind cellular energy metabolism. Glutathione helps manage oxidation, including reactions that break down peroxides. One is a coenzyme; the other is a three-amino-acid peptide. They are not interchangeable.
The useful buying question is not “Which is stronger?” It is which compound your research needs. Studying energy metabolism is different from studying glutathione-dependent antioxidant reactions. A project examining both processes may need both materials, rather than one as a substitute for the other.
Compare NAD+ 500 mg and 1000 mg with glutathione 1500 mg. Here is what separates them before you choose.
NAD+ and glutathione at a glance
| Question | NAD+ | Glutathione |
|---|---|---|
| What is it? | Nicotinamide adenine dinucleotide, a coenzyme | A peptide made from glutamate, cysteine and glycine |
| Research distinction | Electron transfer and NAD-dependent enzyme activity | Glutathione-dependent antioxidant reactions |
| Is it a peptide? | No | Yes, a tripeptide |
What does NAD+ do?
NAD+ moves electrons in the chemistry behind cellular energy metabolism and is used by enzymes such as sirtuins and PARPs. These roles are described in Ratajczak and colleagues' 2016 research.
NAD+ is not the same material as NR, NMN or NADH. For those distinctions and the 500 mg versus 1000 mg value calculation, read our NAD+, NMN and NR guide.
What does glutathione do?
Glutathione is a small peptide made from glutamate, cysteine and glycine. Its chemical identity is recorded by EMBL-EBI's ChEBI database.
One concrete job is taking part in enzyme reactions that break down peroxides, reactive chemicals involved in oxidative stress. Glutathione is not the enzyme. Glutathione peroxidases use it to turn peroxides into less reactive products. Glutathione changes to its oxidised form in the process, as examined in Harman and colleagues' 1986 laboratory study.
In Takebe and colleagues' 2002 study, researchers compared purified human-origin enzymes and measured their activity against hydrogen peroxide and a lipid peroxide. That is research into how antioxidant reactions work, not evidence of a personal benefit from a retail vial.
If glutathione-dependent reactions are the question, view glutathione 1500 mg, rather than treating NAD+ as a replacement.
Compare the actual vials, not just the headline amount
The PEPTALIAS listings checked on 15 October 2026 showed:
| Product | Labelled amount | Supplied vial | Displayed price |
|---|---|---|---|
| NAD+ | 500 mg | 5 mL | A$79.99 |
| NAD+ | 1000 mg | 10 mL | A$119.99 |
| Glutathione | 1500 mg | 10 mL | A$129.99 |
Prices are before shipping. Check the selected product page for current price and availability.
1500 mg of glutathione is not “more NAD+” than a 1000 mg NAD+ vial. A bigger number does not make unlike compounds equivalent. Compare cost per mg only between listings for the same compound, not as a ranking of NAD+ against glutathione.
The mL figures describe containers, not a ready-made liquid concentration or an instruction to add that much liquid. BAC Water is not included; it is a separate laboratory supply.
Check the name and the report before choosing
Both linked supplier PDFs describe themselves as reference templates, not results linked to current stock. The NAD+ report also has conflicting names in its heading and table; the existing NAD+ document clarification explains the issue. Our laboratory-report guide covers the wider checks.
Need NAD+? Compare the 500 mg and 1000 mg vials.
Need glutathione? View the 1500 mg vial.
Separate vials let you source each compound independently when your research needs both. The studies cited here did not test them together, and this guide does not recommend mixing their contents.
Explore more product comparisons in the PEPTALIAS research guides.
PEPTALIAS products are for laboratory research only, not human or veterinary use.