Bulk Ergothioneine powder is a naturally occurring sulfur-containing amino acid. It has unique physiological functions and antioxidant properties. The following is a specific description of the stability of ergothioneine bulk powder.

Stability of ergothioneine under different conditions
1. Effect of temperature on the stability of ergothioneine
•Low-temperature stability:
At lower temperatures, ergothioneine usually exhibits better stability. Generally speaking, when the temperature is in a refrigerated condition of about 4°C, the structure and properties of ergothioneine are relatively stable. Its degradation rate is slow. This is why in the laboratory, ergothioneine standards or biological samples containing l ergothioneine mushrooms are usually stored in a low-temperature environment. This can extend its storage time and reduce decomposition or deterioration caused by temperature.
•High-temperature stability:
As the temperature rises, the stability of L-ergothioneine powder gradually decreases. When the temperature reaches above 60°C, ergothioneine may begin to undergo significant degradation reactions. Under high-temperature conditions, the chemical bonds in the ergothioneine molecule may break. In particular, more active functional groups such as thiol groups are easily affected. This will cause the structure of ergothioneine to change and lose its original biological activity and function. For example, in some food processing processes, if the temperature is too high and the processing time is long, the content of ergothioneine will be significantly reduced.
2. Effect of pH on the stability of ergothioneine
Acidic conditions: In acidic environments, the stability of ergothioneine will be affected to a certain extent. When the pH value is lower than 4, functional groups such as amino groups in ergothioneine molecules may undergo protonation reactions. This may change the charge distribution and spatial configuration of the molecule, thereby affecting its stability. Under strong acidic conditions, ergothioneine powder may undergo reactions such as hydrolysis. This causes its structure to be destroyed. For example, in a strongly acidic environment such as gastric acid, mushrooms with the highest ergothioneine need to be absorbed through a special transport mechanism. Otherwise, it is easily degraded.
•Neutral conditions:
In a pH range close to neutral (pH 6-8), ergothioneine is relatively stable. In this pH range, the functional groups of ergothioneine molecules can maintain a relatively stable state, and their chemical structure and biological activity can also be well maintained. This is why in the body, many physiological environments containing ergothioneine are usually in a neutral or near-neutral pH range, which is conducive to ergothioneine health benefits.
•Alkaline conditions:
When the pH value is higher than 8, the stability of ergothioneine will gradually decrease. In an alkaline environment, the thiol group in the ergothioneine molecule may undergo a deprotonation reaction to form a thiol anion. This ion form is relatively active and easily reacts with other substances. This will cause changes in the structure and properties of ergothioneine powder. For example, in some alkaline industrial production processes or environments, ergothioneine may degrade rapidly.
Effect of light on the stability of ergothioneine
Stability under visible light: In the visible light range, ergothioneine generally has a certain stability. Normal indoor lighting or visible light intensity in a daily environment has little effect on the structure and properties of ergothioneine. Its degradation rate is relatively slow. However, if exposed to strong visible light for a long time, especially high-intensity visible light generated by focusing or special optical equipment. Ergothioneine may undergo photochemical reactions, causing changes in its structure.
•Stability under UV light:
Ergothioneine is sensitive to UV light. UV light has high energy and can stimulate electronic transitions in ergothioneine molecules, triggering a series of photochemical reactions. Under UV light, chemical bonds in ergothioneine molecules may break. In particular, structures such as the imidazole ring may be damaged. This leads to a significant decrease in the stability of ergothioneine in food and the loss of biological activity. Therefore, when storing and using ergothioneine and its related products, it is usually necessary to avoid UV light exposure, use light-shielding packaging, or store it under light-proof conditions.
Stability of ergothioneine in different applications
•Stability in food
In food, the stability of ergothioneine is closely related to the processing and storage conditions of food. In some unprocessed natural foods such as shiitake mushrooms and black fungus, ergothioneine is relatively stable under normal storage conditions. However, during food processing, heating, steaming, baking,g, and other treatment methods may have a significant impact on the stability of ergothioneine. High-temperature processing will cause the content of ergothioneine to decrease, and different processing times and temperatures will have different degrees of impact on it.
In addition, other ingredients in food may also interact with ergothioneine powder and affect its stability. For example, ingredients such as oils, proteins, and sugars in food may form complexes or chemical reactions with ergothioneine, thereby changing the stability of ergothioneine. During food storage, environmental factors such as light, humidity, and oxygen will also affect the stability of ergothioneine. Therefore, reasonable packaging and storage conditions are essential to maintain the stability of ergothioneine in food.

• Stability in cosmetics
In cosmetics, ergothioneine can be added as a functional ingredient. Its stability is of great significance to the efficacy and quality of cosmetics. Cosmetic formulas contain a variety of ingredients. Such as surfactants, fragrances, preservatives, etc. These ingredients may interact with ergothioneine. Some surfactants may affect the solubility and dispersibility of ergothioneine in cosmetic systems. This affects its stability. Ingredients such as fragrances and preservatives may also react chemically with ergothioneine, causing changes in its structure and activity.
In addition, cosmetics are affected by environmental factors such as temperature, light, and humidity during storage and use. High temperature, light, and other conditions may accelerate the degradation of l ergothioneine dosage and reduce its content and activity in cosmetics. Therefore, in the research development and production of cosmetics, it is necessary to ensure the stability of ergothioneine in cosmetics through reasonable formula design and process optimization, as well as the use of appropriate packaging materials and storage conditions.
The stability of mushroom ergothioneine powder is affected by a combination of factors, including temperature, pH value, light, etc. In different environments and application scenarios, these factors need to be fully considered and corresponding measures need to be taken to protect the stability of ergothioneine to ensure that it can exert its due biological activity and function.
As a professional raw materials ergothioneine supplier, Guanjie Biotech specializes in high-quality ergothioneine powder production using advanced fermentation and biosynthesis technology. Our ergothioneine bulk powder, extracted from mushrooms-one of the richest natural sources-boasts a purity of ≥98% and appears as a fine white granular powder. We provide premium raw materials to support research, development, and production across various industries. For bulk ergothioneine powder inquiries, contact us at info@gybiotech.com. We offer competitive pricing on mushrooms highest in ergothioneine and superior service.






