Reviewed by Jessie, BSc Biomedical Science · Formulation Lead, Purest Kids
Why the claim alone tells you nothing
"Quality tested." "Lab-verified." "Certified pure." These phrases appear on supplement packaging with the same frequency as "natural" and "clean." Without specifics, they describe a process without describing what that process checks, who conducted it, or whether results are available.
What genuine third-party testing involves
A meaningful third-party test is conducted by an independent laboratory with no commercial relationship to the brand being tested. It should test for at least three things: active ingredient levels (are the amounts on the label accurate?), heavy metals (lead, mercury, cadmium, arsenic), and microbial contamination.
For an omega-3 supplement specifically, the active ingredient test is critical. DHA and EPA are expensive. Some manufacturers compensate by underdosing — the label says 450mg DHA, but an independent test reveals 180mg. Without third-party verification, there is no way to know.
How to verify a brand's testing claims
A brand that genuinely third-party tests should be able to show you the certificate of analysis (COA). This is the document issued by the independent laboratory after testing. It lists what was tested, the results, and the lab's identification. If a brand claims third-party testing but cannot produce the COA or direct you to it, the claim is unverifiable.
What Purest Kids does
Every batch of Omega-3 Mango Burstlets is independently lab-tested for active ingredient levels, heavy metals, and microbial safety. Results are available. The manufacturing facility holds FDA and GMP certification. This is not a premium — it is the baseline that any supplement your child takes daily should meet.
Omega-3 Mango Burstlets — independently tested, full label transparency →
References
- Cohen PA. "Assessing supplement safety — the FDA's controversial proposal." New England Journal of Medicine, 2012.
- US Food and Drug Administration. "Current Good Manufacturing Practice (CGMP) Regulations." FDA, 2023.