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Open AccessArticle

Determination of the Popularity of Dietary Supplements Using Google Search Rankings

Department of the Treatment of Obesity and Metabolic Disorders, and of Clinical Dietetics, Poznań University of Medical Sciences, Szamarzewskiego 82/84, 60-569 Poznań, Poland
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Nutrients 2020, 12(4), 908; https://doi.org/10.3390/nu12040908 (registering DOI)
Received: 1 March 2020 / Revised: 19 March 2020 / Accepted: 25 March 2020 / Published: 26 March 2020
(This article belongs to the Section Nutrition and Public Health)
The internet provides access to information about dietary supplements and allows their easy purchase. We aimed to rank the interest of Google users in dietary supplements and to determine the changes that occurred in their popularity from 2004 to 2019. We used Google Trends to generate data over time on regional interest in dietary supplements (n = 200). We categorized each included supplement and calculated the interest in all topics in proportion to the relative search volume (RSV) of “lutein”. We analyzed the trends over time of all topics and categories. Globally, the topics with the highest popularity were “magnesium”, which was 23.72 times more popular than “lutein”, “protein” (15.22 times more popular), and “iron” (15.12). The categories of supplements receiving most interest were protein (9.64), mineral (5.24), and vitamin (3.47). The RSV of seven categories of topics (amino acid, bacterial, botanical, fiber, mineral, protein, and vitamin) increased over time while two categories (enzyme and fat or fatty acid) saw a drop in their RSV. Overall, 119 topics saw an increase in interest over time, 19 remained stable, and 62 saw interest in them decrease. Google Trends provides insights into e-discourse and enables analysis of the differences in popularity of certain topics across countries and over time.
Keywords: Google Trends; dietary supplements; ranking; internet; magnesium; mineral; vitamin; protein; iron; PubMed Google Trends; dietary supplements; ranking; internet; magnesium; mineral; vitamin; protein; iron; PubMed
MDPI and ACS Style

Kamiński, M.; Kręgielska-Narożna, M.; Bogdański, P. Determination of the Popularity of Dietary Supplements Using Google Search Rankings. Nutrients 2020, 12, 908.

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