Ergothioneine (2-mercaptohistidine trimethylendolide, L-Ergothioneine, EGT) is the only known natural 2-thioimidazole amino acid (2-thioimidazole). EGT has an absorption wavelength similar to DNA in the UV absorption range, which can effectively protect against UV damage. EGT has a strong antioxidant capacity and can inhibit the formation of various oxidation active substances. In addition, EGT is chemically stable, can accumulate in the epidermal cells of the skin belly and is non-toxic.
Ergothioneine is a natural antioxidant that can protect cells in the human body and is an important active substance in the body. Natural antioxidants are safe and non-toxic, and have become a research hotspot. As a natural antioxidant ergothioneine has entered people's field of vision. It has various physiological functions such as scavenging free radicals, detoxification, maintaining DNA biosynthesis, normal cell growth and cellular immunity.
| Test Items | Specifications | Results | Test Method |
|---|---|---|---|
| Assay | ≥99.0% | 99.25% | HPLC |
| Appearance | White to off-white powder | Conforms | Visual observation |
| Identification | HPLC retention time correspond to WRS | Conforms | HPLC |
| Loss on drying | ≤0.50% | 0.18% | USP<731> |
| Ethanol residue | ≤500ppm | 137ppm | GC |
| Heavy metals | ≤20ppm | Conforms | USP<231> |
| Arsenic(As₂O₃) | ≤2ppm | Conforms | ICP-MS |
| Lead(Pb) | ≤1ppm | Conforms | ICP-MS |
| Mercury (Hg) | ≤0.2ppm | Conforms | ICP-MS |
| Cadmium(Cd) | ≤0.3ppm | Conforms | ICP-MS |
| Total plate count | ≤1000cfu/g | Conforms | USP<61> |
| Yeast and molds | ≤100cfu/g | Conforms | USP<61> |
| Coliforms | ≤10mpn/g | Conforms | MPN |
| Coli | Negative in 10g | Negative | USP<62> |
| Salmonella | Negative in 10g | Negative | USP<62> |
| S.aureus | Negative in 10g | Negative | USP<62> |
| Conclusion | The product conforms to In-house Standard | ||