Comparison of verbal claims for natural health products made by health food stores staff versus pharmacists in Ontario, Canada.

BACKGROUND: This study tested the hypothesis that while there are no written medical claims existing for many NHP, such claims are made verbally, giving a false impression that these are proven medical products.

OBJECTIVE: To compare the number and type of verbal claims for NHP made by pharmacists to those made by health food stores personnel.

METHODS: Randomly selected Canadian pharmacies selling NHP and health food stores were visited and the staff was asked to recommend natural health products for the treatment of hypertension.

RESULTS: All health food stores (n=20) but only 4 out of 38 pharmacies (p< 0.001) recommended NHP for the treatment of hypertension. A majority of health food store staff (70%) stated that NHP are superior or equal to medicinal drugs in treating hypertension based on efficacy.

CONCLUSION: Unlike pharmacy practice, verbal claims are common practice in health food stores, despite the lack of either written claims and/or proof of efficacy for most of them. These may be a very effective approach given that 30-40% of North American adults are functionally illiterate. These verbal claims are often inappropriate and not evidence-based.