Adhering to GOED's Monograph
What the monograph specifies, and how testing demonstrates conformance.
The GOED monograph is a voluntary standard, which sometimes leads people to treat it as optional. In practice most serious buyers of EPA and DHA ingredients treat conformance as a condition of purchase.
What it covers
- Composition — EPA, DHA and total omega-3 content, by chemical form.
- Oxidation — peroxide value, anisidine value and TOTOX, each with a ceiling.
- Contaminants — heavy metals, PCBs, dioxins and furans.
- Identity and labelling consistency.
Demonstrating it
Conformance is a testing programme, not a single certificate. The composition work and the oxidation work use different methods and often different sample handling — oxidation results in particular are sensitive to how the sample travelled.
An oxidation result measures the sample as it arrived, which is not always the sample as it was shipped.
Related reading
When Omega-3 Research Gets Specific
What this resistance training study really shows — and why population clarity matters more than the headline.
Andrew Jenkins · 26 Feb 2026 OxidationUnderstanding and Managing Lipid Oxidation in Pet Foods
Oxidation drives palatability and shelf life long before it becomes a safety question.
Andrew Jenkins · 17 Apr 2025 MethodsEnsuring Omega-3 Purity and Potency of Marine Oils
In-process sampling, purity checks, and what the GOED monograph actually requires of a supplier.
Andrew Jenkins · 24 Jan 2025Need this tested?
Tell us what you are trying to demonstrate and we will suggest the panel that does it.