Guallar E, Stranges S, Mulrow C, Appel LJ, Miller ER (December 2013). "Enough is enough: Stop wasting money on vitamin and mineral supplements". Ann. Intern. Med. (Editorial). 159 (12): 850–1. doi:10.7326/0003-4819-159-12-201312170-00011. PMID24490268.{{cite journal}}: CS1 maint: multiple names: authors list (ลิงก์)
Guallar E, Stranges S, Mulrow C, Appel LJ, Miller ER (December 2013). "Enough is enough: Stop wasting money on vitamin and mineral supplements". Ann. Intern. Med. (Editorial). 159 (12): 850–1. doi:10.7326/0003-4819-159-12-201312170-00011. PMID24490268.{{cite journal}}: CS1 maint: multiple names: authors list (ลิงก์)