CFR › Title 21 › Part 111 › §111.31021 CFR §111.310Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy linkYou must use adequate laboratory facilities to perform whatever testing and examinations are necessary to determine whether:(a)Components that you use meet specifications;(b)In-process specifications are met as specified in the master manufacturing record; and(c)Dietary supplements that you manufacture meet specifications.