Efectos de la vitamina A en los riesgos de fractura. (Inglés)

1 Drug Information Specialty Resident, Purdue University/Clarian Health Partners, Indianapolis, IN 2 Associate Professor of Pharmacy Practice, School of Pharmacy and Pharmaceutical Sciences, Purdue University; Drug Information Specialist, Clarian Health Partners

Reprints: Dr. Jackson, Clarian Health Partners Pharmacy Department, Rm. AG 401, I-65 @ 21st St., Indianapolis, IN 46202-1367, fax 317/962-1756, hjackson@clarian.org

OBJECTIVE: To describe current data evaluating the effect of vitamin A intake on fracture risk.

DATA SOURCES: A literature search using MEDLINE (1966-March 2005) was conducted using the search terms bone density, fractures, osteoporosis, retinol, and vitamin A to identify published studies evaluating the effects of vitamin A on bone.

DATA SYNTHESIS: Studies evaluating vitamin A consumption and fracture risk were reviewed. Current data suggest a potential inverse relationship between excess vitamin A consumption and bone mineral density leading to an increased risk for fracture.

CONCLUSIONS: Although current data are limited, consumption of large amounts of vitamin A may be associated with decreased bone mineral density and increased fracture risk. Until further information is available, patients should be made aware of the potential risks of consuming vitamin A in amounts that exceed the recommended dietary allowance. Further research is needed to clarify the relationship between vitamin A and fracture risk.