Premium Antioxidant
GLISERA EGT® — Branded Ergothioneine from Golden Oyster Mushroom
A powerful, naturally occurring antioxidant for beauty-from-within, skin health and healthy aging. GLISERA EGT® delivers pure ergothioneine extracted from golden oyster mushroom — one of nature’s richest sources — in a clean, water-soluble powder that is vegan, non-GMO, gluten-free and preservative-free, standardised to ergothioneine ≥ 0.7%.
Golden Oyster Mushroom Extract
What Is Ergothioneine (EGT)?
Ergothioneine (often written L-ergothioneine, or EGT) is a naturally occurring amino acid derivative — a unique, water-soluble antioxidant. It is produced in nature mainly by microorganisms and fungi; humans cannot synthesize it and must obtain it from the diet, with mushrooms among the richest sources.
Did You Know?
Ergothioneine takes its name from ergot, the fungus from which it was first isolated in 1909 — though today it is sourced from edible mushrooms such as the golden oyster.
Unique Biology
The “Longevity” Antioxidant
What makes ergothioneine unique is how the body handles it. A dedicated transporter — OCTN1 (the ergothioneine transporter, ETT) — actively carries EGT into cells and concentrates it where oxidative stress is highest, including the mitochondria.
Because it is rapidly absorbed and stored in red blood cells, ergothioneine maintains plasma levels far longer than many antioxidants — supporting long-lasting cellular health from within. This distinctive biology is why EGT has attracted strong interest in healthy aging and longevity research.
Antioxidant Mechanism
A Powerful Antioxidant
Scavenges Free Radicals
EGT scavenges reactive oxygen species and free radicals — including highly damaging hydroxyl radicals — helping to neutralise the radical activity behind cellular ageing.
Stable & Well Absorbed
Unlike glutathione (GSH), which breaks down easily in the gut, ergothioneine is stable and well absorbed — making it an effective antioxidant choice for oral formulations.
Long-Lasting Protection
Stored in red blood cells, EGT maintains plasma levels far longer than conventional antioxidants — providing sustained cellular protection from within.
Target Benefits
How GLISERA EGT® Is Positioned
Designed to help manufacturers develop differentiated products across beauty, wellness and healthy aging categories.
Beauty-from-Within
Supporting skin moisture, the skin barrier, and a brighter, more even-looking complexion.
Antioxidant Defence
Supporting the skin and body’s defences against everyday oxidative and UV-related stress.
Healthy Aging
An antioxidant associated with healthy-aging research and longevity science.
Restful Beauty Sleep
Supporting overnight recovery and restorative sleep for visible morning radiance.
Specifications
Origin & Usage
Sourcing & Manufacturing
Sourced from golden oyster mushroom, one of nature’s richest ergothioneine sources. GMP-certified extraction and manufacturing facilities in Taiwan, with rigorous quality control and HPLC standardisation.
Suitable Formats
Capsules and tablets, functional beverages and beauty drinks, beauty and skincare supplements, functional foods and gummies.
Sourcing & Availability
A Reliable L-Ergothioneine Supplier
Ergothioneine has historically been costly and difficult to source at scale, and limited availability of L-ergothioneine has kept it out of many formulations. As a reliable L-ergothioneine supplier, FC Materials helps manufacturers access GLISERA EGT® with the cost, quality and documentation needed to bring EGT into real products.
Regulatory Status
Recognised in Key Markets
Ergothioneine has gained regulatory recognition in several markets — including GRAS status in the United States and Novel Food approval in the EU for certain ergothioneine sources. Documentation on GLISERA EGT®’s specific regulatory and Halal-suitability status is available on request.
Scientific Foundation
Research Background
Ergothioneine is an active area of research. Studies have explored its antioxidant, anti-inflammatory and cytoprotective properties.
Illustrative supplier research data on ergothioneine, provided for manufacturer evaluation, not as product claims.
Selected Research on Ergothioneine
Biochem Biophys Res Commun. 2023;682:163–173
Front Med (Lausanne). 2024;11:1396783
Food Sci Nutr. 2025;13(6):e70382
Oxid Med Cell Longev. 2020;2020:2576823
This section summarises the research literature to support your evaluation. It does not constitute a claim that GLISERA EGT® treats, prevents or reduces any condition or disease. Manufacturers are responsible for ensuring finished-product claims comply with local regulations.
Common Questions
Frequently Asked Questions
What is GLISERA EGT® made from?
It is ergothioneine (EGT) extracted from golden oyster mushroom — one of the richest natural sources of this unique antioxidant.
Is it the same as synthetic or fermentation-derived ergothioneine?
GLISERA EGT® is mushroom-derived. Some ergothioneine on the market is produced by fermentation/biosynthesis from microorganisms; GLISERA EGT® offers a naturally extracted, branded alternative.
Does FC Materials manufacture GLISERA EGT®?
No. We source and supply it from a trusted global partner. FC Materials acts as your sourcing partner, providing documentation, MOQ discussion, formulation direction and supplier coordination.
Is it vegan and Halal-suitable?
It is vegan, non-GMO, gluten-free and preservative-free. Halal-suitability documentation can be confirmed on request.
Can I get a sample and specification sheet?
Yes — request documentation and samples to evaluate suitability for your formulation. Our team will support your development with full specifications, COA and research materials.
Bring Beauty-from-Within to Your Next Product
Request GLISERA EGT® documentation, samples, the research pack and pricing. Tell us your application and target market, and our team will support your development.
