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Golden Rice is an effective source of vitamin A.
Tang G, Qin J, Dolnikowski GG, Russell RM, Grusak MA. Tang G, et al. Am J Clin Nutr. 2009 Jun;89(6):1776-83. doi: 10.3945/ajcn.2008.27119. Epub 2009 Apr 15. Am J Clin Nutr. 2009. PMID: 19369372 Free PMC article. Clinical Trial.