A study published in the Canadian Medical Journal touts ginseng as an effective supplement for fighting or preventing symptoms of the common cold.

An editorial in the same issue questions the researcher’s findings and challenges the overall efficacy of “natural remedies.”

The study? Funded by the manufacturer of the ginseng pill used in the research—CV Technologies of Edmonton, Alberta.

The editorial? Written by Ronald B. Turner, a consultant to Wyeth Consumer Healthcare, Schering-Plough Research Institute, Procter & Gamble among others.