Glutathione vs NAC
Glutathione and NAC are constantly compared in antioxidant research, and the relationship is direct: NAC (N-acetylcysteine) supplies the cysteine the body needs to build glutathione. One is the master antioxidant itself; the other is its rate-limiting precursor.
Glutathione
The body's master antioxidant tripeptide (Glu-Cys-Gly).
BEST STUDIED FOR
Direct antioxidant, detox & skin research
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NAC
N-acetylcysteine, the cysteine precursor the body uses to build glutathione.
BEST STUDIED FOR
Glutathione-precursor & mucolytic research
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SIDE BY SIDE
| Glutathione | NAC | |
|---|---|---|
| What it is | The glutathione tripeptide itself | A precursor supplying cysteine |
| Level it acts on | The antioxidant molecule directly | The rate-limiting building block |
| Mechanism | Thiol redox; regenerates vitamins C and E | Provides cysteine to synthesise glutathione |
| Research angle | Redox, hepatic detox, skin brightening, immune | Raising endogenous glutathione, mucolytic, antioxidant |
| Oral bioavailability | Direct glutathione is poorly absorbed orally | Cysteine precursor is well absorbed orally |
| Relationship | The finished master antioxidant | The precursor that builds it |
WHEN TO RESEARCH WHICH
Research glutathione when the interest is the master antioxidant directly — its redox, detoxification and skin literature. Research NAC when the interest is raising endogenous glutathione by supplying cysteine, or its own mucolytic and antioxidant research. The choice is essentially the finished molecule vs the building block that makes it.
FREQUENTLY ASKED
What is the difference between glutathione and NAC?
Glutathione is the master antioxidant tripeptide itself; NAC (N-acetylcysteine) is the cysteine precursor the body uses to build glutathione. Glutathione is the finished molecule, NAC is the building block.
Does NAC raise glutathione?
In the research literature NAC supplies the rate-limiting cysteine needed to synthesise glutathione, which is why it is studied as a way to raise endogenous glutathione. Glutathione is supplied here for research purposes only.
Which should I research?
It depends on the question: glutathione directly for the master-antioxidant biology, NAC where the precursor pathway or mucolytic action is the focus. Glutathione is HPLC-verified with a Certificate of Analysis.
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All products supplied for research purposes only. Not for human consumption.