How the sourcing tiers work
Every item in the Aussie Clean Grocery Directory sits in one of four tiers. The tiers aren't about "good" and "bad" foods in the abstract — they're a shopping shortcut. They answer one question: of the realistic options on the shelf, which is the cleanest-sourced, and how far is the one in your trolley from it?
The four tiers
Tier 1 — Local regenerative & certified organic, direct
Farmers markets, farm-gate direct, organic craft butchers, and certified-organic (ACO / BFA) outlets. Shortest supply chain, chemical- and GMO-free inputs, and animals raised on pasture at low stocking density.
Tier 2 — Independent wholefood grocers & clean supermarket swaps
Specialty grocers and the genuinely clean lines inside the big supermarkets — certified-organic ranges, single-ingredient wholefoods, cold-pressed olive oil, pasture-raised eggs. What most people can buy on a normal weekly shop.
Trade up when you can — refined, not junk
Fine to use; a better option exists. High-oleic sunflower oil, "natural" skincare with phenoxyethanol, conventional (non-organic) wholefoods, pasteurised ferments. No reason to panic if it's in your cupboard — just upgrade it next time.
Red flag — best avoided
Solvent-extracted seed oils, ultra-processed foods, battery-cage eggs, grain-finished feedlot meat, synthetic dyes, and body-care ingredients like SLS and parabens. The items worth actively swapping out.
What actually moves an item up or down
- Supply-chain length. Fewer steps between the farm and you generally means fresher food and more transparency about how it was grown or raised.
- Inputs. Certified organic and biodynamic production sharply reduces synthetic-pesticide and glyphosate residues. Some research links these residues to changes in the gut microbiome, so lower exposure is the goal.
- How animals were raised. Pasture-raised eggs and grass-finished meat tend to have a lower omega-6 to omega-3 ratio and more fat-soluble vitamins (A, D3, E, K2) than feedlot equivalents. This is about fat quality, not drug residue — antibiotic use is already controlled by mandatory withholding periods.
- Processing and additives. Heat, solvents (hexane), and a long additive list all push an item down. Certain emulsifiers such as polysorbate-80 and carboxymethylcellulose (466) thinned the protective gut-mucus layer in animal studies (Chassaing et al., 2015).
Where it's deliberately uncertain
Where a mechanism is still debated, the directory phrases it as "may" or "linked to" rather than stating it as fact. The tiers reflect a holistic-health approach to sourcing and are general education — not a claim that a Tier 3 item will make you unwell, or that Tier 1 treats anything.