How to check whether a supplement is batch tested
Answer
Find the batch number on the tub, then look that number up against the certification programme's published results. A logo on packaging is a claim about a product line, not a check on the batch in your hand.
Key takeaways
- What is the actual check?
- The batch number on your tub, looked up against the programme's published result for that batch.
- Is a logo enough?
- No. Artwork outlasts certification, formulations change and sites change. The number is what resolves it.
- Where is the batch number?
- Usually printed or stamped on the base or the side of the tub, alongside a best before date.
- What if there is no batch listing?
- Then the product is not certified for that batch, whatever the packaging suggests.
Step one: find the batch number
It is printed or ink stamped on the base or the side of the tub, usually next to a best before date, and it is often the least legible thing on the packaging.
That number is what everything else depends on. Certification programmes publish results against batch numbers, recalls are issued against batch numbers, and any query to a manufacturer will be answered against one. Photograph it when you open a tub, because ink stamps rub off.
Step two: look it up, do not look at the logo
Certification programmes maintain searchable listings of certified products and batches. The check is entering your batch number and seeing whether a result exists for it.
A logo printed on a pack is a claim about a product line at the time the artwork was produced. Artwork outlives certifications, manufacturers change sites, and formulations change without packaging catching up immediately. None of that is necessarily dishonest and all of it means the logo is not the check.
| Signal | What it tells you | Reliability |
|---|---|---|
| Certification logo on the pack | The line was certified at some point | Weak on its own |
| Batch number listed in the programme's database | That batch was screened | This is the check |
| Manufacturer states independently lab tested | Contaminants and label accuracy | Different check entirely |
| GMP manufacture | Process control | Says nothing about a batch |
| A retailer saying it is safe | Nothing verifiable | Ignore |
Step three: check what the testing actually covered
This is where most confusion lives. Independently lab tested for purity means a laboratory confirmed the contents match the label and that contaminants such as heavy metals sit within limits. It is a real quality check.
It is not a banned substance screen. The two get conflated constantly in supplement marketing and by well meaning retailers. Futuro Labs Magnesium Glycinate, Futuro Labs Omega 3 Fish Oil, Futuro Labs Marine Collagen and Futuro Labs Lion's Mane are all independently lab tested for purity and made in the UK to GMP standards, and none of them is batch certified for sport.
Step four: keep the tub
For as long as you are taking a product, and ideally a little beyond. If a question ever arises, the batch number is the only thing that lets anyone investigate it.
Photographing the batch number and the ingredients panel when a tub is opened takes ten seconds and means the information survives the packaging being thrown away. That is the single most useful habit on this page and almost nobody does it.
What certification does not do
No programme claims to eliminate risk. Screening has detection limits, so a substance present below them will not be found, and certification covers the batch tested rather than every batch a manufacturer produces.
It remains the strongest assurance available on a shop shelf, and for a player subject to testing it is the only meaningful one. The honest framing is substantial risk reduction rather than a guarantee, and strict liability means the player carries the consequence either way.
If a product is not certified
For a player who could be tested, that is the deciding factor and the rest of the label does not rescue it. Choose a certified product.
For a player who genuinely could not be tested, formula simplicity is the next best signal. A single active with declared excipients has a smaller surface than a fifteen ingredient blend with a proprietary matrix. That is risk reduction rather than a substitute, and it is the position Futuro Labs products occupy: single ingredient, fully declared, UK made, not certified.
The whole check
- Find the batch number on the base or side of the tub.
- Photograph it and the ingredients panel when you open the product.
- Look the batch number up in the certification programme's listing.
- Treat a logo without a listed batch as unverified.
- Read what any stated testing actually covered, purity or banned substances.
- Keep the tub for as long as you are taking it.
- If you could be tested and there is no listing, choose a different product.
Where to go next
- Informed Sport supplements for rugby playersWhat the programmes cover, what they do not, and why small brands skip them.
- How to check a supplement against the banned listThe other half: checking ingredients and medications rather than a batch.
- Banned substances and batch testingStrict liability, how contamination happens and what to expect if selected.
The product
Futuro Labs Magnesium Glycinate
Futuro Labs Magnesium Glycinate is the 300mg elemental one at 22p a day, independently lab tested for purity and UK made to GMP standards. It is not batch certified for sport, so a player who could be tested should run this check on a certified product instead.
- 300mg elemental magnesium, 80% NRV
- Bisglycinate, best tolerated common form
- UK made to GMP, lab tested for purity
- Not batch certified for sport
Sharper Rugby is published by Futuro Labs. If you buy through this link Futuro Labs earns from the sale. Prices are set by Amazon.
Questions players ask
How do I check if a supplement is batch tested?
Find the batch number on the tub and look it up in the certification programme's published listing.
Is a logo on the pack enough?
No. Artwork outlives certification and formulations change, so the batch number is the check.
Where is the batch number?
Usually on the base or side of the tub, next to the best before date.
Does lab tested mean the same thing?
No. Purity testing checks label accuracy and contaminants, not banned substances.
What if my batch is not listed?
Then that batch is not certified, whatever the packaging suggests.
Should I keep the tub?
Yes, for as long as you are taking it. Photograph the batch number when you open it.
Should I photograph the batch number?
Yes, when you open the tub. Ink stamps rub off and the number is what any investigation depends on.