By Roy, founder Last updated 18/08/2026
Flip over almost any Australian supplement and you'll find a small code near the ingredients list: AUST L, followed by a string of numbers. Most people walk past it. Worth thirty seconds, because it tells you something real, just not what most people assume it tells you.
What does AUST L actually mean?
AUST L means the product is listed on the Australian Register of Therapeutic Goods, the ARTG, run by the Therapeutic Goods Administration. Listed products sit in the TGA's lower-risk category. To get a listing, the sponsor certifies that every ingredient comes from a permitted list, that the product is manufactured to good manufacturing practice, and that any claims on the label are the kind allowed for a listed product.
The word to notice is certifies. For a listed medicine, the TGA does not independently check the sponsor's evidence before the product goes on shelf. It relies on the sponsor's own declaration, backed by a requirement to hold evidence on file if asked. The TGA runs compliance checks after the fact, on a sample of listed products, not on every one before it launches.
What AUST L does not tell you
An AUST L number does not mean the TGA has reviewed and approved the product's specific claims. It does not mean a government scientist has checked that the ingredients work, or work together, at the doses on the label. It means the formula is built from ingredients the TGA has pre-approved as low risk, and the sponsor has told the TGA it meets the rules.
That's a real bar. Ingredients outside the permitted list, or doses above the permitted ceiling, can't get listed at all. But it's a different bar to "the TGA tested this and confirmed it does what the label says."
AUST L versus AUST R: what's the actual difference?
AUST R means registered, a different and much higher bar. Registered medicines go through the TGA's own evaluation of quality, safety and efficacy before approval, the kind of process a new prescription medicine goes through. Very few supplements are registered, because the evidence and cost required sit closer to pharmaceutical development than to a typical wellness product.
So the short version: AUST L is a self-certified low-risk listing with after-the-fact spot checks. AUST R is a government-evaluated approval. They look similar on a label. They are not the same thing, and a brand that lets you assume otherwise is leaning on the confusion.
Why does any of this matter to you as a buyer?
Because an AUST L number is a floor, not a ceiling. It tells you a product cleared a compliance bar for what it's allowed to contain and say. It does not tell you the product is more effective than one without a listing, and it does not substitute for reading what's actually on the label: the ingredients, the amounts, and what the brand can honestly claim about them under Standard 1.2.7 of the Food Standards Code or the therapeutic goods framework, whichever applies to that product.
Some categories of product, food-format supplements among them, aren't eligible for an AUST L listing at all, because they're regulated as food rather than as a therapeutic good. That's not automatically a downgrade. A food-format product has its own rulebook, its own labelling requirements, and its own limits on what it can claim, generally tighter on health claims than the listed-medicine pathway. Different register, different rules, not a lesser product by default.
Settl is one of those. It's regulated as a food, not a listed medicine, so it carries no AUST L number and doesn't need one. What Settl can say instead: it's packed in Sydney, in a facility that holds a TGA manufacturing licence. That licence describes the facility's manufacturing standard. It is not a TGA approval of Settl itself, and Settl doesn't hold one, because as a food it isn't the kind of product the ARTG registers. The ingredients and their amounts are printed on the pack for the same reason this article exists: so you can check for yourself rather than take a code's word for it.
The practical habit
Next time you're comparing two products and one has an AUST L number and the other doesn't, that alone doesn't tell you which one is better. Check what each product actually discloses: full ingredient amounts or a proprietary blend, what claims sit on the front of the pack, and whether those claims match what the regulatory pathway that product sits under actually allows. The number is a starting point for questions, not an answer on its own.
This article explains the regulatory mechanism in general terms and isn't legal advice. If a specific claim or listing matters to a purchase decision, the TGA's own public ARTG search is the primary source, not a brand's summary of it, including this one.
For more on how Australian supplement labels work, see the Australian sleep supplement guide.
Settl is the nightly sleep powder behind this blog. One scoop in cold water before bed, built to get you to sleep faster, wake less at 3am, sleep deeper and wake up refreshed. No melatonin. Seven actives, every dose on the label. Packed in Sydney, in a TGA-licensed GMP facility. Start For $69.99, then $89.99 a month, inc. GST. Cancel, pause or skip any time. Or buy a single tub, $99. One-time order. Nothing renews.
Cheers, Roy