Does “third-party tested” mean a supplement is proven to work?

No. Quality testing and proof of benefit answer different questions. Independent testing can help check ingredients, amounts or contaminants. It does not automatically show that a supplement will produce the health result advertised. NIH Office of Dietary Supplements.

A product can contain exactly what its label says and still offer little benefit for your particular goal. The reason for taking it, the evidence and possible interactions still matter.

At MedFIT, a useful supplement discussion starts with what you hope to improve—not how impressive the packaging looks.

Next: Bring the label and the claim you want help evaluating.