GSO 193:2021: Gulf Technical Regulation: Contaminants and toxins in food and feed (Edition 1, 01/07/2021) — page updateshttps://heavymetalcertified.com/regulations/gso-193Published revisions of this Heavy Metal Certified page.GSO 193:2021: Gulf Technical Regulation: Contaminants and toxins in food and feed (Edition 1, 01/07/2021)https://heavymetalcertified.com/regulations/gso-193https://heavymetalcertified.com/regulations/gso-193#revision-3d8193ca4eee699cSun, 20 Sep 2026 18:04:57 GMTThe heavy-metal maximum levels set by GSO 193:2021: Gulf Technical Regulation: Contaminants and toxins in food and feed (Edition 1, 01/07/2021) (GSO), as recorded in the Heavy Metal Index register and cited by HMTc certification standards. Records sovereign law; does not set HMTc thresholds.