How is Ergothioneine Powder manufactured?

As a trusted supplier of Ergothioneine Powder, I am often asked about the manufacturing process behind this remarkable compound. Ergothioneine, a naturally occurring amino acid derivative, has gained significant attention in recent years due to its well-documented antioxidant properties and potential health benefits. In this blog post, I will take you through the key steps involved in manufacturing Ergothioneine Powder, from fermentation and extraction to the final product.

 

The harvested Boletus edulis fruiting bodies are washed thoroughly and dried in an oven at below 60°C until constant weight is reached. The dried material is then ground using a milling machine and sieved to a fine powder (60-80 mesh). This particle size increases the solid-liquid contact area, significantly improving extraction efficiency in subsequent steps.

 

Ergothioneine is easily soluble in water and polar alcohols, and it is heat-stable. For this reason, extraction typically employs hot water extraction. The dried Boletus edulis powder is mixed with deionized water at a solid-to-liquid ratio of 1:15 to 1:30 (g/mL). The mixture is heated to 70°C-90°C and stirred for 60-90 minutes. The extraction is usually repeated 2-3 times, and the extracts are combined to ensure high recovery.

 

The Boletus edulis extract contains large amounts of macromolecular impurities, including polysaccharides, proteins, saponins, and pigments, which must be removed through graded separation.

a. Centrifugation and filtration: The extract is centrifuged at 6000 r/min or passed through a plate-and-frame filter to remove insoluble residues.

b. Ultrafiltration: The filtrate is processed through a hollow fiber ultrafiltration membrane with a molecular weight cutoff of 1 kDa to 30 kDa. Macromolecular proteins and polysaccharides are retained, while Ergothioneine passes through into the permeate. This step significantly increases purity.

c. Vacuum concentration: The ultrafiltration permeate is concentrated under reduced pressure at 50°C-60°C to approximately 1/10 of its original volume, yielding a concentrated extract or paste.

 

This is the core step for obtaining high-purity (≥99%) Ergothioneine powder.

a. Stationary phase selection: Hydrophilic interaction chromatography (HILIC) packing, macroporous adsorption resin, or strong acidic cation exchange resin is used.

b. Mobile phase elution: An acetonitrile-water system (typically 80:20 to 88:12 by volume) is used for gradient or isocratic elution.

c. Fraction collection: The eluate is monitored by a UV detector (wavelength typically set at 257-260 nm, the absorption peak of Ergothioneine), and the target chromatographic fractions containing Ergothioneine are precisely collected.

 

After chromatographic purification, the collected fractions are concentrated under reduced pressure to recover acetonitrile. The resulting concentrate is then mixed with suitable excipients and subjected to spray drying to obtain a fine, high-purity white Ergothioneine powder. Spray drying is a fast and cost-effective method suitable for large-scale production of food-grade or cosmetic-grade powder.

After spray drying, the material is milled and sieved to achieve a uniform particle size suitable for blending, encapsulation, or tableting.

 

Quality control is an essential part of the manufacturing process. We employ a comprehensive analytical program that includes high-performance liquid chromatography (HPLC) for assay and purity determination, mass spectrometry (MS) for identity confirmation, and microbiological testing to ensure product safety. Heavy metals, residual solvents, and moisture content are also monitored on every batch. These analyses ensure that our Ergothioneine Powder meets the highest standards of quality and consistency for food, supplement, and cosmetic applications.

 

Once the Ergothioneine Powder passes quality control, it is packaged and stored. We use packaging materials that protect the product from moisture, light, and oxygen, such as aluminum foil bags or sealed containers. Ergothioneine Powder should be stored in a cool, dry, and dark place. For maximum stability, storage at -20°C is recommended for long-term preservation (typically valid for up to 3 years), while 2-8°C is suitable for shorter-term storage.

 

For formulators incorporating ergothioneine powder into cosmetic or nutraceutical products, the following general guidance may be useful:

a. Recommended dosage: In cosmetic formulations, typical use levels are approximately 0.1%-1.0%, with some premium products using higher amounts. The specific level should be determined based on product positioning, sensory requirements, and stability testing. For oral supplements, human studies have reported no adverse effects at daily intakes up to 25 mg, and Health Canada accepts a maximum daily intake of less than 6 mg for adults.

b. pH compatibility: Ergothioneine demonstrates good stability across a broad pH range and is compatible with most aqueous and emulsion systems. Verification under the intended pH conditions is recommended.

c. Thermal stability: Ergothioneine exhibits good thermal stability and can be used in formulations subjected to certain heat-processing steps. Stability should be confirmed under the actual process temperature and time conditions.

d. Antioxidant synergy: Studies suggest that ergothioneine may act synergistically with antioxidants such as L-ascorbic acid, α-tocopherol, and ferulic acid. The optimal ratio should be determined through experimental optimization.

e. Compatibility: Ergothioneine is well compatible with a range of water-soluble cosmetic ingredients, including niacinamide. Formulations containing copper ions should be evaluated separately, as copper may affect ergothioneine stability.

 

In addition to Ergothioneine Powder, we also offer a range of other high-quality natural products, including Quercetin 98% Extract Powder, Ursolic Acid Powder, Sesamin Powder, NAD Powder, and Griffonia Seed Extract.

If you are interested in purchasing Ergothioneine Powder or any of our other products, please feel free to contact us at info@inhealthnature.com. We are committed to providing our customers with the highest quality products at competitive prices and excellent customer service.

 

References

[1] Wongchantarawirat, P., Phumat, P., & Kiattisin, K. (2026). Synergistic antioxidant effects and development of niosomes loaded with L-ascorbic acid, alpha-tocopherol, ferulic acid, and ergothioneine. Cosmetics, 13(4), 211.

[2] Chen, S. Y., Ho, K. J., Hsieh, Y. J., Wang, L. T., & Mau, J. L. (2012). Contents of lovastatin, γ-aminobutyric acid and ergothioneine in mushroom fruiting bodies and mycelia. LWT - Food Science and Technology, 47(2), 274-278.

[3] Kalaras, M. D., Richie, J. P., Calcagnotto, A., & Beelman, R. B. (2017). Mushrooms: A rich source of the antioxidants ergothioneine and glutathione. Food Chemistry, 233, 429-433.