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Judy D. Ribaya-Mercado, Sc.D.

Judy Ribaya-Mercado Scientist I
Antioxidants Research Laboratory
Jean Mayer USDA HNRCA at Tufts University
711 Washington Street
Boston, MA 02111-1524
Phone: (617) 556-3128
Fax: (617) 556-3344
E-mail: judy.ribaya-mercado@tufts.edu
Education Sc.D., Nutritional Biochemistry
Harvard University School of Public Health
Research Focus Vitamin A, carotenoids, and other antioxidant nutrients: their bioavailability and health effects
Academic Appointments Assistant Professor
Gerald J. and Dorothy R. Friedman School of Nutrition Science and Policy at Tufts University
Selected Professional Affiliations

American Society for Clinical Nutrition Vitamin A Tracer Task Force



Featured HNRCA Research Publications
Ribaya-Mercado JD, Blumberg JB. Vitamin A: is it a risk factor for osteoporosis and bone fracture? Nutr Rev. 2007;65:425-438.

Ribaya-Mercado, J.D., Maramag, C.C., Tengco, L.W., Dolnikowski, G.G., Blumberg, J.B., Solon, F.S.  Carotene-rich plant foods ingested with minimal dietary fat enhance the total-body vitamin A pool size in Filipino schoolchildren as assessed by stable-isotope-dilution methodology. American Journal of Clinical Nutrition. 2007;85:1041-1049.

Maki, K.C., Galant, R., Samuel, P., Tesser, J., Witchger, M., Ribaya-Mercado, J.D., Blumberg, J.B., Geohas, J.  Effects of consuming foods containing oat b-glucan on blood pressure, carbohydrate metabolism and biomarkers of oxidative stress in men and women with elevated blood pressure. European Journal of Clinical Nutrition. 2007;61:786-795.

Haskell, M.J., Ribaya-Mercado, J.D., Vitamin A Tracer Task Force.  Handbook on vitamin A tracer dilution methods to assess status and evaluate intervention programs. HarvestPlus Technical Monograph 5. International Food Policy Research Institute: Washington, D.C.; 2005.

Ribaya-Mercado JD, Blumberg JB. Lutein and zeaxanthin and their potential roles in disease prevention. J Am Coll Nutr. 2004;23:567S-587S.


Other Recent Publications

Bermudez, O.I., Ribaya-Mercado, J.D., Talegawkar, S.A., Tucker, K.L.  Hispanic and non-Hispanic white elders from Massachusetts have different patterns of carotenoid intake and plasma concentrations. Journal of Nutrition. 2005;135:1496-1502.

Ribaya-Mercado, J.D., Solon, F.S., Fermin, L.S., Perfecto, C.S., Solon, J.A.A., Dolnikowski, G.G., Russell, R.M.  Dietary vitamin A intakes of Filipino elders with adequate or low liver vitamin A concentrations as assessed by the deuterated-retinol-dilution method: implications for dietary requirements. American Journal of Clinical Nutrition. 2004;79:633-641.

Furr HC, Green MH, Haskell M, Mokhtar N, Nestel P, Newton S, Ribaya-Mercado JD, Tang G, Tanumihardjo S, Wasantwisut E.
Stable isotope dilution techniques for assessing vitamin A status and bioefficacy of provitamin A carotenoids in humans. Public Health Nutr. 2005;8(6):596-607.

Ribaya-Mercado JD, Solomons NW, Medrano Y, Bulux J, Dolnikowski GG, Russell RM, Wallace CB. Use of the deuterated-retinol-dilution technique to monitor the vitamin A status of Nicaraguan schoolchildren 1 y after initiation of the Nicaraguan national program of sugar fortification with vitamin A. Am J Clin Nutr. 2004;80(5):1291-8.

Ribaya-Mercado JD, Solon FS, Dallal GE, Solomons NW, Fermin LS, Mazariegos M, Dolnikowski GG, Russell RM. Quantitative assessment of total body stores of vitamin A in adults with the use of a 3-d deuterated-retinol-dilution procedure. Am J Clin Nutr. 2003;77(3):694-9.

Ribaya-Mercado JD. Influence of dietary fat on beta-carotene absorption and bioconversion into vitamin A. Nutr Rev. 2002;60(4):104-10.

Davidson MH, Maki KC, Umporowicz DM, Ingram KA, Dicklin MR, Schaefer E, Lane RW, McNamara JR, Ribaya-Mercado JD, Perrone G, Robins SJ, Franke WC. Safety and tolerability of esterified phytosterols administered in reduced-fat spread and salad dressing to healthy adult men and women. J Am Coll Nutr. 2001;20(4):307-19.

Maki KC, Davidson MH, Umporowicz DM, Schaefer EJ, Dicklin MR, Ingram KA, Chen S, McNamara JR, Gebhart BW, Ribaya-Mercado JD, Perrone G, Robins SJ, Franke WC. Lipid responses to plant-sterol-enriched reduced-fat spreads incorporated into a National Cholesterol Education Program Step I diet. Am J Clin Nutr. 2001;74(1):33-43.

Beharka AA, Paiva S, Leka LS, Ribaya-Mercado JD, Russell RM, Nibkin Meydani S. Effect of age on the gastrointestinal-associated mucosal immune response of humans. J Gerontol A Biol Sci Med Sci. 2001;56(5):B218-23.

Ribaya-Mercado JD, Solon FS, Solon MA, Cabal-Barza MA, Perfecto CS, Tang G, Solon JA, Fjeld CR, Russell RM. Bioconversion of plant carotenoids to vitamin A in Filipino school-aged children varies inversely with vitamin A status. Am J Clin Nutr. 2000;72(2):455-65.

To see more of Dr. Judy Ribaya-Mercado's publications, please visit PubMed and search for "Ribaya-Mercado J."