Name: Glutathione
Brand: Lilipeptide
SKU: LILI-glutathione
Price: 105.00 USD
Availability: InStock

Glutathione at a glance

Glutathione is a three-residue peptide with an unusual link: glutamate joins cysteine through its side-chain gamma-carboxyl group instead of the usual alpha-carboxyl bond, which shields it from most peptidases. Cells make it in two ATP-dependent steps, using glutamate-cysteine ligase and then glutathione synthetase. The reduced form, GSH, is what this listing supplies. Its oxidized counterpart, GSSG, consists of two glutathione molecules joined by a disulfide bond.

Price and availability

This is Lilipeptide‘s listing, dispatched from China. It is listed at $105.00. As with every order here, the brand is paid only after you confirm delivery.

This listing: Lilipeptide Glutathione

Brand: Lilipeptide
Also sold by: Purus Peptides 1,500mg $62.00 · Lab77 Peptides 1,500mg $89.00 · HK Peptide 1,500mg $100.00 · TFC Peptides 1,500mg $85.00 · Uther Peptide 1,500mg $95.00 · Uther Peptide 600mg $55.00

Lab testing

There is no public lab report for this listing yet. We can ask the brand for the batch COA before you order. Many buyers also split an independent HPLC test with others who bought the same batch.

Request the batch COA · How group testing works

Bought through escrow: the brand is only paid after you confirm delivery. If the parcel never arrives, or an independent test shows the wrong compound or a significant under-fill, open a claim before releasing payment.

What it is studied for

The cysteine thiol is the working part of the molecule. It can donate electrons directly to reactive oxygen and nitrogen species, and it serves as the reducing substrate for glutathione peroxidases, which convert peroxides to water or alcohols. Glutathione S-transferases attach it to electrophilic compounds, an early step in clearing many foreign chemicals. Glutathione reductase, using NADPH, recycles GSSG back to GSH, and the ratio between the two is widely used as a marker of cellular redox state. Pigmentation studies propose that it shifts melanin synthesis toward lighter pheomelanin.

Research and regulatory status

Glutathione biochemistry is thoroughly established. Applied research is less settled: cell and animal studies span liver injury, neurodegeneration, aging and immune function, and human trials have looked at liver markers and skin tone with mixed results. A recurring problem is delivery, since oral glutathione is largely broken down before absorption and circulating levels after supplementation vary between studies. Some regulators have warned against unapproved injectable products marketed for skin lightening.

Checking the lab data

A useful report distinguishes the reduced form from oxidized GSSG, usually by HPLC against a reference standard, and states the GSSG level as an impurity. Mass spectrometry should confirm the mass of reduced glutathione. Because the free thiol oxidizes over time, the test date relative to manufacture matters. The lyophilized material should be white and form an even cake or free-flowing powder, with no yellowing.

No independent report is attached to this listing yet. You can compare brands that publish one on the marketplace or browse the lab reports directory.

Listing details

Compound: Glutathione
Synonyms: GSH, L-Glutathione (reduced)
Class: Endogenous tripeptide antioxidant
Format: Lyophilized (freeze-dried) powder
Sold by: Lilipeptide
Ships from: China
Lab report: Not yet published

Storage and preparation

Freeze-dried peptide keeps best sealed, cold and dark. Once it has been dissolved, refrigerate it, avoid repeated warming and follow the stability limits in your study protocol.

Buyer questions

Why is glutathione delivery a recurring topic in the literature?

Glutathione is broken apart in the digestive tract and by enzymes on cell surfaces, so supplied glutathione may not reach cells intact. Researchers therefore compare routes and precursor strategies, such as N-acetylcysteine, and measure blood or tissue levels directly rather than assuming uptake.

What makes glutathione's peptide bond unusual?

Its glutamate is attached through the side-chain gamma-carboxyl group rather than the standard alpha position. Most peptidases do not recognize that linkage, which helps glutathione persist inside cells. Breakdown instead begins at the cell surface through gamma-glutamyl transpeptidase, part of a recycling loop for its amino acids.

When does Lilipeptide get paid?

Only after you confirm delivery. Until then the payment is held in escrow, and you can open a claim if anything is wrong with the order.

Supplied for laboratory research only. Not for human or veterinary use, and not a substitute for any prescription medicine. Nothing on this page is medical advice.