“…The lack of strict governmental regulation and oversight accompanied by consumers' relatively limited knowledge and inability to objectively evaluate supplements on their own may motivate consumers to rely on ordinary lay beliefs/theories or "rules of thumb" when making supplement-based decisions. An expanding stream of research across social science disciplines demonstrates that people often rely on simple heuristics, commonly referred to as lay theories or naïve beliefs (e.g., Beruchashvili, Moisio, & Heisley, 2014;Johar & Mukhopadhyay, 2004;Kramer, Irmak, Block, & Illyuk, 2012;Rozin, Ashmore, & Markwith, 1996). More specifically, empirical evidence supports that consumers often adopt such naïve/lay beliefs about products and services, including health-related product decisions (e.g., Catlin, Pechmann, & Brass, 2015;Deval, Mantel, Kardes, & Posavac, 2013;Frosch, Kimmel, & Volpp, 2008;Hughner & Kleine, 2008;McFerran & Mukhopadhyay, 2013;Rozin et al, 1996).…”