NAD+ vs Glutathione: What the Research Shows
NAD+ and Glutathione side by side: what they are, how they are regulated and what is still unknown.
Medically reviewed by Juan Pablo Frías, MD · · DisclosureUpdated
Coenzyme (injectable, IV or nasal)CompoundedNAD+Coenzyme sold as an injectable wellness product; a systematic review concluded clinical effectiveness for anti-aging or wellness outcomes remains inconclusive.[2]
Antioxidant tripeptide (injectable)CompoundedGlutathioneAntioxidant tripeptide; in a 6-month randomized trial of oral glutathione, levels rose 30-35% in erythrocytes, plasma and lymphocytes in the high-dose group.[3]
Quick verdict
Summary of studies, not a recommendationWhere the research points
Consider NAD+ if…
- you want a systematic review of the field: for NAD+ supplementation, clinical effectiveness for anti-aging or wellness outcomes remains inconclusive[2]
- you want to know about intravenous use: the systematic review found no eligible outcomes trials of intravenous or intramuscular NAD+ for anti-aging or wellness[2]
- you want real-world IV data: in a retrospective pilot of commercial infusions, NAD+ IV was associated with moderate to severe gastrointestinal symptoms, higher heart rate and chest pressure[4]
Consider Glutathione if…
- you want a randomized trial of oral glutathione: blood glutathione levels rose after 1, 3 and 6 months at both doses (a biomarker outcome, not clinical benefit)[3]
Neither is FDA approved for any use in people. Status labels come from public FDA and WADA records; see the sources below.
Side by side
Spec comparison
Showing 2 of 8 fields where the two differ. FDA status, PCAC vote, Jul 2026, WADA, Half-life, Evidence strength, Typical study doses are the same or both unknown.
| Field | NAD+ | Glutathione |
|---|---|---|
| Class | Coenzyme (injectable, IV or nasal) | Antioxidant tripeptide (injectable) |
| Also called | NAD, nicotinamide adenine dinucleotide | — |
| FDA status | Compounded | Compounded |
| PCAC vote, Jul 2026 | Not on the Jul 2026 agenda | Not on the Jul 2026 agenda |
| WADA | No WADA record in our data | No WADA record in our data |
| Half-life | [half-life by route] | [half-life by route] |
| Evidence strength | [evidence grade] | [evidence grade] |
| Typical study doses | [dose range] | [dose range] |
Bracketed values are pending a sourced figure. Legal data reflects the regulatory events in our tracker.
Taken together?
NAD+ and Glutathione together
People also search for this pair as a stack. The stack page covers timing and interaction questions as they are sourced. Evidence for the combination: No studies tested these together (PubMed search: 3489 results, 2 Oct 2026).
Sources
- 1PubMed search: (glutathione[tiab]) AND ("NAD+"[tiab] OR "nicotinamide adenine dinucleotide"[tiab])PubMed · 2026pubmed.ncbi.nlm.nih.govAccessed 2 Oct 2026
- 2NAD⁺ supplementation for anti-aging and wellness: A PRISMA-guided systematic review of preclinical and clinical evidence.Ageing research reviews · 2026PMID 41655607Accessed 2 Oct 2026
- 3Randomized controlled trial of oral glutathione supplementation on body stores of glutathione.European journal of nutrition · 2015PMID 24791752Accessed 2 Oct 2026
- 4Intravenous infusion of nicotinamide adenine dinucleotide (NAD+) versus nicotinamide riboside (NR): a retrospective tolerability pilot study in a real-world setting.Frontiers in aging · 2026PMID 41704678Accessed 2 Oct 2026
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