Short version: Most supplement label claims are not independently verified. Third-party testing — sending each batch to an unaffiliated laboratory — is how a brand proves the product matches the label. We test every batch of LOAD in Victoria. Here's what gets checked, why it matters, and how to read the results.
The regulatory gap
In Australia, listed complementary medicines (which most supplements fall under) are regulated by the TGA, but the rules are lighter than for prescription medicines. Manufacturers self-attest that their products meet specifications. Random TGA audits do happen, but the day-to-day enforcement of "what's actually in the bottle" depends largely on the manufacturer's own quality systems.
This is not a uniquely Australian issue. Studies of the global supplement market consistently find a meaningful percentage of products that:
- Contain less of the labelled active ingredient than claimed
- Contain undeclared substances (sometimes contaminants, sometimes substituted ingredients)
- Test above safety limits for heavy metals (especially lead, arsenic, cadmium, mercury)
The frequency of these issues varies wildly by category. Plant-derived products and protein powders have the biggest variance. Single-molecule supplements like creatine monohydrate are usually closer to the label, but not always.
What "third-party tested" actually means
Third-party testing means a sample of each production batch is sent to an independent laboratory — one with no commercial relationship to the brand. The lab runs a defined set of analyses and returns a Certificate of Analysis (CoA).
The phrase shows up on a lot of supplement labels. What separates a meaningful claim from a marketing one:
- Every batch, not just spot-checks. If a brand only tests one batch a year, that's not a quality system — that's a marketing prop.
- The lab is named, accredited, and verifiable. NATA-accredited labs in Australia, ISO 17025 internationally. Anyone can call themselves a "lab."
- The results are publishable. If you can't see a CoA on request, the testing isn't doing what it's claimed to do.
- The right things are being tested. See below.
What gets tested (and why)
1. Active ingredient identity and quantity
The lab confirms the product actually contains what the label says. For creatine, this means verifying the substance is creatine monohydrate (not a substituted compound), and that the per-serve dose matches the labelled amount within an acceptable tolerance.
Industry tolerance is typically ±10%. We aim to land closer to ±5%.
2. Heavy metals
The big four screened for in supplement testing:
- Lead. Cumulative neurotoxin. No safe level for chronic exposure.
- Arsenic. Carcinogen. Often present in trace amounts in plant-derived ingredients.
- Mercury. Neurotoxin. Higher risk in fish-derived products, lower in synthetic creatine.
- Cadmium. Kidney toxicity. Often associated with cocoa, hemp, and some leafy greens.
Each is tested against the safety thresholds set by Australian standards. Anything above those thresholds means the batch doesn't ship.
3. Microbial contamination
Total aerobic count, yeast, mould, E. coli, salmonella. Standard food-safety panel. Important because contaminated supplements can cause acute illness, particularly for immunocompromised users.
4. Banned substances (sport-relevant)
For products marketed to athletes, screening for substances on the WADA prohibited list is increasingly standard. We are not currently on the Informed Sport register but are looking at adding it.
How to read a CoA
A typical Certificate of Analysis includes:
- Batch number. Should match the number on your product packaging.
- Date of manufacture and date of testing.
- Lab name, accreditation number, and signatory.
- Specification table: the metric tested (e.g. "creatine monohydrate"), the spec ("≥99% purity, 5g ± 5% per serve"), the result, and pass/fail.
- Heavy metals table with the same structure.
- Microbial table.
You're looking for: every line says "PASS" or shows a value within spec, the lab is named and accredited, and the batch number matches your product.
Why we test every batch in Victoria
Three reasons:
- Local accountability. NATA-accredited Australian labs operate under defined Australian quality standards. Easier to verify, easier to audit.
- Faster turnaround. Sending samples interstate beats sending them overseas. Every-batch testing only works if the testing isn't a months-long bottleneck.
- It costs more — and we'd rather absorb that than skip the testing. A typical full-panel batch test runs into the hundreds of dollars per batch. Spread across thousands of units, it's a meaningful per-unit cost. We bake it into the price rather than dropping it as a "premium tier."
What about LIGHTS OUT?
LIGHTS OUT is currently produced in Australia using premium magnesium citrate sourced for purity. We are working toward bringing it into the same per-batch third-party testing program as LOAD. We will publish results on our testing page as soon as the program is in place.
Until then: we screen the raw ingredient lots used in production and we will share what we have on request. The honest framing is that LIGHTS OUT is on the same path LOAD already walks; LOAD is just further along.
How to check ours
Two ways:
- Visit our testing page for the most recent published certificate.
- Email hello@projectarete.com.au with your batch number (it's printed on your pouch) and we'll send you that batch's specific certificate.
What to ask of any supplement brand
If you're shopping outside Project Arete, the questions worth asking before you commit:
- "Is every batch tested by an independent, accredited lab?"
- "Can I see the CoA for the batch I'm about to buy?"
- "What's tested for? At minimum: identity, quantity, heavy metals, microbials."
- "What happens to a batch that fails spec?"
The quality of the answers tells you what kind of brand you're dealing with. A brand that can't or won't answer these is asking you to trust the label.
Educational content. Not medical advice.
