Testing of oregano oil sold on Amazon yields ‘disappointing’ results

Of the 35 products tested, only 14 met the label claim for carvacrol, the active measurable component in oregano oil, while six had no detectable levels of whatsoever of the compound, NOW reported.

The Illinois-based company purchased two samples of each oregano oil supplement (including NOW brand) in February 2026 to conduct internal analyses. It also partnered with Eurofins, an ISO 17025-accredited independent laboratory, to ensure accuracy and transparency.

Oregano (Origanum vulgaris) is a popular, aromatic herb whose oil is used to maintain healthy intestinal flora balance.

“We are seeing double-digit YOY growth for our oregano oil SKUs, which…