Form Comparison

Liposomal Glutathione vs S-Acetyl Glutathione

How liposomal glutathione and S-acetyl glutathione differ in potency, absorption, tolerance, and cost.

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Quick verdict. Both are premium forms with weak human evidence: liposomal has a 12-person uncontrolled pilot, and S-acetyl glutathione has cell studies and scant pharmacokinetic data. Neither has been shown to beat plain reduced glutathione or NAC. If you want one of these two, liposomal at least has human data; NAC is the better-studied way to raise glutathione.

Side by Side

Liposomal Glutathione S-Acetyl Glutathione
Absorption Variable Variable
How it is absorbed Packaged in phospholipid vesicles to limit gut breakdown. A 12-person open-label pilot reported higher body stores within two weeks. Acetylating the sulfur protects it from breakdown in cell studies; the acetyl group is removed inside cells. Human pharmacokinetic data are scant.
Typical dose 500-1,000 mg daily 100-300 mg daily
Common uses antioxidant support antioxidant support
Side effects Bloating; unpleasant taste in liquid forms. None well documented.
Cost High High
Also called None SAG

When to Choose Liposomal Glutathione

Choose liposomal glutathione when you accept a high price for a small, uncontrolled evidence base. The supporting data are a small pilot without a placebo group.

Liposomal Glutathione

Faster rise in a small uncontrolled pilot, at a higher price.

What to look for: Milligrams of glutathione per serving stated, not just milligrams of liposomal liquid.

Find on iHerb Affiliate link

When to Choose S-Acetyl Glutathione

There is rarely a reason to choose S-acetyl glutathione: NAC is the cheaper, better-studied route. Marketed as the best-absorbed oral glutathione without published human trials to show it.

S-Acetyl Glutathione

There is rarely a reason to choose S-acetyl glutathione: NAC is the cheaper, better-studied route.

What to look for: S-Acetyl Glutathione named on the Supplement Facts panel, with the amount per serving stated.

Find on iHerb Affiliate link

Products on Titrate

884 of the 214,745 labels in the NIH Dietary Supplement Label Database list glutathione as an active ingredient (379 on market). 304 are sold as glutathione products by name.

Open supplement search

Glutathione does not have its own search category yet. Each product above links to its full label in the NIH database.

Related

References

Witschi A, Reddy S, Stofer B, Lauterburg BH. The systemic availability of oral glutathione. Eur J Clin Pharmacol. 1992;43(6):667-669.

Marrades RM, Roca J, Barberà JA, de Jover L, MacNee W, Rodriguez-Roisin R. Nebulized glutathione induces bronchoconstriction in patients with mild asthma. Am J Respir Crit Care Med. 1997;156(2):425-430.

Hauser RA, Lyons KE, McClain T, Carter S, Perlmutter D. Randomized, double-blind, pilot evaluation of intravenous glutathione in Parkinson's disease. Mov Disord. 2009;24(7):979-983.

Allen J, Bradley RD. Effects of oral glutathione supplementation on systemic oxidative stress biomarkers in human volunteers. J Altern Complement Med. 2011;17(9):827-833.

Sekhar RV, Patel SG, Guthikonda AP, et al. Deficient synthesis of glutathione underlies oxidative stress in aging and can be corrected by dietary cysteine and glycine supplementation. Am J Clin Nutr. 2011;94(3):847-853.

Richie JP Jr, Nichenametla S, Neidig W, et al. Randomized controlled trial of oral glutathione supplementation on body stores of glutathione. Eur J Nutr. 2015;54(2):251-263.

Sinha R, Sinha I, Calcagnotto A, et al. Oral supplementation with liposomal glutathione elevates body stores of glutathione and markers of immune function. Eur J Clin Nutr. 2018;72(1):105-111.