Third-party testing and berberine: what the seals mean

Electric Tiger Berberine is not currently independently tested, and it has no published certificate of analysis (COA) — we say so plainly rather than imply otherwise. Here's what third-party testing, NSF and USP marks actually mean, and how to check any berberine product's testing claims, including ours, the day we have one.

What independent, third-party testing actually means

It means a lab outside the brand or its manufacturer checked a specific batch and confirmed what's on the label matches what's in the bottle. It doesn't mean the product has been reviewed by the FDA before sale — dietary supplements reach shelves without that kind of pre-market review. A general "quality tested" claim with no lab named and no COA available isn't the same thing as independent batch testing.

NSF, USP and what their marks actually require

NSF's Certified for Sport® program and USP's Verified Mark are two of the more rigorous marks in the supplement industry: both require ongoing facility audits and batch testing against a public standard, and both let you look up whether a specific product actually carries the mark on the organization's own site. The word "USP" or "NSF" printed on a label, without one of those verifiable marks, isn't the same as holding it.

Where Electric Tiger Berberine stands

This SKU does not currently have a certificate of analysis confirming its actual berberine content, and it does not carry an independent testing mark. We're not going to claim testing we can't show. If that changes, we'll publish the COA here rather than just adding a badge.

How to check any brand's claim, including ours

• Ask for a batch-specific COA, not a general "we test everything" statement.
• Confirm the mark is real by looking the product up directly on that organization's own site (NSF, USP, Informed Choice, ConsumerLab).
• Check that the COA tests for what matters — actual berberine content against the label's standardization claim, not just heavy metals or microbials.
• A closed date or a batch number that doesn't match what you bought means the COA doesn't cover your bottle.

Questions people ask

Is Electric Tiger Berberine independently tested?

Not at this time. This SKU doesn't carry an independent testing mark or a published COA, and we're not claiming one.

Are berberine patches independently tested?

We haven't reviewed independent testing claims for transdermal berberine patches — a different product category than the oral capsules covered here.

How do I know a berberine supplement is actually independently tested?

Ask for the batch-specific COA and confirm the mark directly on the certifying organization's own site, using the checklist above rather than taking a label's word for it.

Related reading: how to choose a good berberine and berberine without fillers: reading the other ingredients.