This document is a patent application filed with the USPTO, detailing a new crystal form of ergothioneine and a method for its preparation. The application, identified as US20260085049A1, claims a method that efficiently and stably produces anhydrous ergothioneine with high purity, high mass fraction, low moisture content, and high crystallization yield.

While this is a patent application and not a regulation, entities involved in the development or manufacturing of dietary supplements, foods, or cosmetics may be interested in the intellectual property claims related to ergothioneine. The filing date was December 4, 2025, with a publication date of March 26, 2026. No compliance actions or deadlines are imposed by this filing; it pertains to the protection of intellectual property.