Quick answer
GlyNAC is a combination of glycine and NAC (N-acetyl cysteine) in one supplement. NAC on its own provides cysteine; GlyNAC adds glycine. Both glycine and cysteine are building blocks of glutathione, which is why the two are often paired.
Gly
Glycine, the simplest amino acid
NAC
N-acetyl cysteine, a stable form of cysteine
Shared link
Both are building blocks of glutathione
MAYN GlyNAC
1200mg per serve, 90 capsules
What is GlyNAC?
GlyNAC is a name for the pairing of glycine and NAC. Glycine is the simplest amino acid and is found in protein foods, particularly gelatin, collagen, bone broth and meat. NAC is a stable form of the amino acid cysteine.
How do glycine and NAC relate to glutathione?
Glutathione is made from three amino acids: glutamate, cysteine and glycine. NAC supplies cysteine and glycine is supplied directly, so GlyNAC provides two of the three building blocks in one product.
Glutathione = glutamate + cysteine + glycine. NAC covers cysteine; GlyNAC covers cysteine and glycine.
GlyNAC vs NAC at a glance
| NAC | GlyNAC | |
|---|---|---|
| What's in it | N-acetyl cysteine | Glycine + N-acetyl cysteine |
| Glutathione building blocks supplied | Cysteine | Cysteine and glycine |
| MAYN product | NAC 600mg or 1000mg | GlyNAC 1200mg, 90 capsules |
| Formats | Capsules, gummies | Capsules |
Which should you choose?
If you want NAC on its own, a straight NAC product is simpler and usually cheaper per serve. If you'd like glycine and NAC together in one capsule, GlyNAC saves buying two products. Check the label for the amount of each ingredient per serve, and speak with your healthcare professional if you're unsure which suits you.
Frequently asked questions
What does GlyNAC stand for?
GlyNAC stands for glycine plus N-acetyl cysteine (NAC).
Is GlyNAC the same as glutathione?
No. GlyNAC supplies glycine and cysteine (via NAC), two of the three amino acids that make up glutathione. A glutathione supplement provides the finished molecule.
Where does glycine come from in food?
Glycine is found in protein foods, especially gelatin, collagen, bone broth, meat and fish.
Keep reading
This article is general information only and is not medical advice. Always read the label and follow the directions for use. Dietary supplements should not replace a balanced diet. If you are pregnant, breastfeeding, taking medication or have a medical condition, speak with your doctor or pharmacist before taking a new supplement.



