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מקורות ויטמין A



  1. Mastroiacovo P, Mazzone T, Addis A, et al. High vitamin A intake in early pregnancy and major malformations: a multicenter prospective controlled study. Teratology 1999;59:7–11.
  2. Sibulesky L, Hayes KC, Pronczuk A, et al. Safety of <7500 RE (<25000 IU) vitamin A daily in adults with retinitis pigmentosa. Am J Clin Nutr 1999;69:656–63.
  3. Bendich A, Langseth L. Safety of vitamin A. Am J Clin Nutr 1989;49:358–71.
  4. Tolerable Upper Intake Levels (UL), Vitamins. Food and Nutrition Board, Institute of Medicine, National Academies.

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