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	Soil Association Organic United Kingdom · Tier 2 Trusted	Tún (Iceland) Iceland · Tier 1 Gold	? 'Natural' (NOT a certification) Worldwide · Tier 4 Marketing	Non-GMO Project Verified United States · Tier 3 Specialty
What it means	The UK's largest organic certifier. Standards are stricter than the UK government's baseline (which still mirrors EU 2018/848 post-Brexit). Recognised by the EU and USA under equivalence.	Vottunarstofan Tún is Iceland's only accredited organic certifier. Accredited by MAST (Matvælastofnun) under the EU 2018/848-equivalent Icelandic standard, so a Tún-certified product is also recognised as EU-organic.	The word 'natural' on packaging is a marketing term, not a certification. In most jurisdictions there's no legal definition, no standard, and no inspection. A product labelled 'natural' can contain synthetic ingredients, pesticides, GMOs, and artificial flavours.	North America's leading 'no genetically modified organisms' certification. Tests for the presence of GMOs in finished products. NOT organic.
Scope	Several categories	Food	Several categories	Food
Established	1946	1994	—	2010
Inspection	Annual on-site, UKAS-accredited	Annual on-site, MAST-accredited	None	Annual third-party audit + lab testing
Residue testing	Risk-based	Required for at-risk operations	None	GMO testing only (not pesticide)
Guarantees	Stricter-than-baseline organic standards across food, textiles, cosmetics, and farming. Annual on-site inspection. Animal welfare standards (outdoor access, lower stocking density).	≥95% organic ingredients per EU rules. No synthetic pesticides, no GMOs. Annual on-site inspection. Animal welfare standards (outdoor / pasture access, geothermally-warmed greenhouse compatibility for vegetables).	Nothing. It is not a certification and there is no body verifying anything.	Verified absence of GMO ingredients (with action thresholds, not zero tolerance). Annual third-party verification. Tracing and segregation across the supply chain.
Does NOT	Logo is trademarked — not a free-licence mark.	There aren't many Tún-certified operations (~120–160) — coverage in the Icelandic market is narrower than in the EU mainland.	Doesn't mean organic. Doesn't mean pesticide-free. Doesn't mean GMO-free. Doesn't mean ethically produced. Some markets (e.g. the US FDA on food, EU on cosmetics) place very limited restrictions on the word, but enforcement is weak.	Doesn't mean organic — Non-GMO products can use synthetic pesticides and fertilizers freely.

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