SEARCH

SEARCH BY CITATION

References

  • Aguayo VM, Baker SK, Crespin X, Hamani H, MamadoulTaïbou A. 2005. Maintaining high vitamin A supplementation coverage in children: lessons from Niger. Food Nutr Bull 26:2631.
  • Ahmed M, Akter MS, Eun JB. 2010. Peeling, drying temperatures, and sulphite-treatment affect physicochemical properties and nutritional quality of sweet potato flour. Food Chem 121:1128.
  • Amede T, Stroud A, Aune J. 2004. Advancing human nutrition without degrading land resources through modeling cropping systems in the Ethiopian highlands. Food Nutr Bull 25:34453.
  • Ameny MA, Wilson PW. 1997. Relationship between Hunter color values and beta-carotene content in white-fleshed African sweet potatoes (Ipomoea batatas Lam). J Sci Food Agric 73:3016.
  • Antia BS, Akpan EJ, Okon PA, Umoren IU. 2006. Nutritive and anti-nutritive evaluation of sweet potatoes (Ipomoea batatas) leaves. Pakistan J Nutr 2:1668.
  • Beaton GH, Martorell R, Aronson KJ, Edmonston B, McCabe G, Ross AC, Harvey B. 1993. Effectiveness of vitamin A supplementation in the control of young child morbidity and mortality in developing countries. United Nations (UN) Administrative Committee on Coordination, Sub-committee on Nutrition State-of-the-Art Series: Nutrition Policy Discussion Paper Nr 13. Geneva: United Nations. 166 p.
  • Bengtsson A, Namutebi A, Larson Alminger M, Svanberg U. 2008. Effects of various traditional processing methods on the all-trans-β-carotene content of orange sweet potato. J Food Comp Anal 21:13443.
  • Bengtsson A, Larsson Alminger M, Svanberg U. 2009. In vitro bioaccessibility of beta-carotene from heat-processed orange-fleshed sweet potato. J Agric Food Chem 57: 96938.
  • Bezerra DS, de Araújo KF, Azevêdo GM, Dimenstein R. 2010. A randomized trial evaluating the effect of 2 regimens of maternal vitamin A supplementation on breast milk retinol levels. J Hum Lact 26:14856.
  • Biesalski HK, Chichili GR, Frank J, von Lintig J, Nohr D. 2007. Conversion of beta-carotene to retinal pigment. Vitam Horm 75:11730.
  • Black RE, Allen RH, Bhutta ZA, Caulfield LE, de Onis M, Ezzati M, Mathers C, Rivera J. 2008. Maternal and child undernutrition: global and regional exposures and health consequences. Lancet 371:24360.
  • Blomhoff R, Blomhoff HK. 2006. Overview of retinoid metabolism and function. J Neurobiol 66:60630.
  • Bouis HE, Welch RM. 2010. Biofortification a sustainable agricultural strategy for reducing micronutrient malnutrition in the global south. Crop Sci 50:S20S32.
  • Bovell-Benjamin AC. 2007. Sweet potato: a review of its past, present, and future role in human nutrition. Adv Food Nutr Res 52:159.
  • Britton G. 1995. Structure and properties of carotenoids in relation to function. FASEB J 9:15518.
  • Burri BJ, Clifford AJ. 2004. Carotenoid and retinoid metabolism: insights from isotope studies. Arch Biochem Biophys 430:1109.
  • Burri BJ, Neidlinger TR, Clifford AJ. 2001. Serum carotenoid depletion follows first-order kinetics in healthy adult women fed naturally low carotenoid diets. J Nutr 131:2096100.
  • Burri BJ, Turner T. 2009. Evaluating the effectiveness of beta-carotene-rich food interventions for improving vitamin A status. In: HaugenL, BjornsonT, editors. Beta-carotene: dietary sources, cancer and cognition. Haupergne , N.Y. : Nova Scientific Pub. p 12039.
  • Chandler LA, Schwartz SJ. 1988. Isomerization and losses of trans-β-carotene in sweet potatoes as affected by processing treatments. J Agric Food Chem 36:12933.
  • Chattopadhyay A, Chakraborty I, Kumar PR, Nanda MK, Sen H. 2006. Uncontrolled storage behaviour of sweet potato (Ipomoea batatas L. Lam). J Food Sci Tech-Mysore 43:415.
  • Chichili GR, Nohr D, Schäffer M, von Lintig J, Biesalski HK. 2005. Beta-carotene conversion into vitamin A in human retinal pigment epithelial cells. Invest Ophthalmol Vis Sci 46:35629.
  • Comis D. 2008. Sweet potato out-yields corn in ethanol production study [Internet]. Washington D.C. : Agricultural Research Service; c 2008. Available from: http://www.ars.usda.gov/is/pr/2008/080820.htm . Accessed Sept 9, 2010.
  • Consultative Group on International Agricultural Research (CGIAR). 2009. Research and impact. Areas of research: sweet potato [Internet]. Washington D.C. : CGIAR. Available from: http://www.cgiar.org/impact/research/sweetpotato.html . Accessed Sept 9, 2010.
  • Dary O, Mora JO. 2002. Food fortification to reduce vitamin A deficiency: international vitamin A consultative group recommendations. J Nutr 132:2927S33S.
  • Davis CR, Howe JA, Rocheford TR, Tanumihardjo SA. 2008. The xanthophyll composition of biofortified maize (Zea mays Sp.) does not influence the bioefficacy of provitamin A carotenoids in Mongolian gerbils (Meriones unguiculatus). J Agric Food Chem 56:674550.
  • de Pee S, West CE, Permaesih D, Martuti S, Muhilal Hautvast JG. 1998. Orange fruit is more effective than are dark-green, leafy vegetables in increasing serum concentrations of retinol and beta-carotene in schoolchildren in Indonesia. Am J Clin Nutr 68:105867.
  • Dongmeza E, Steinbronn S, Francis G, Focken U, Becker K. 2009. Investigations on the nutrient and antinutrient content of typical plants used as fish feed in small-scale aquaculture in the mountainous regions of Northern Vietnam. Anim Feed Sci Tech 149:16278.
  • Donnen P, Sylla A, Dramaix M, Sall G, Kuakuvi N, Hennart P. 2007. Effect of daily low dose of vitamin A compared with single high dose on morbidity and mortality of hospitalized mainly malnourished children in Senegal: a randomized controlled clinical trial. Eur J Clin Nutr 61:13939.
  • Duriancik DM, Lackey DE, Hoag KA. 2010. Vitamin A as a regulator of antigen presenting cells. J Nutr 140:13959.
  • Emenhiser C, Watkins RH, Simunovic N, Solomons N, Bulux J, Barrows J Schwartz SJ. 1999. Packaging preservation of beta-carotene in sweet potato flakes using flexible film and an oxygen absorber. J Food Qual 22:6373.
  • Faber M, van Jaarsveld PJ. 2007. Review – the production of provitamin A-rich vegetables in home-gardens as a means of addressing vitamin A deficiency in rural African communities. J Sci Food Agric 87:36677.
  • Failla ML, Thakkar SK, Kim JY. 2009. In vitro bioaccessibility of beta-carotene in orange-fleshed sweet potato (Ipomoea batatas, Lam.). J Agric Food Chem 57:1092227.
  • Fawzi WW, Chalmers TC, Herrera MG, Mosteller F. 1993. Vitamin A supplementation and child mortality: a meta-analysis. J Am Med Assoc 269:898903
  • Fiedler JL, Afidra R. 2010. Vitamin A fortification in Uganda: comparing the feasibility, coverage, costs, and cost-effectiveness of fortifying vegetable oil and sugar. Food Nutr Bull 31:193205.
  • Fonseca MJD, Soares AG, Junior MF, de Almeida DL, Ascheri JLR. 2008. Effect of extrusion-cooking in total carotenoids content in cream and orange-flesh sweet potato cultivars. Hort Brasil 26:1125.
  • Food and Agriculture Organization of the United Nations (FAO). 2009. FAOSTAT. Crops and livestock products [Internet]. Geneva : FAO. Available from: http://faostat.fao.org/site/535/default.aspx#ancor . Accessed Aug 19, 2010.
  • Glasziou PP, Mackerras DE. 1993. Vitamin A supplementation in infectious diseases: a meta-analysis. Br Med J 306:36670.
  • Greenpeace. 2007. Palm oil: cooking the climate-once you pop, you can't stop [Internet]. London : Greenpeace Intl.Available from: http://www.greenpeace.org/international/en/news/features/palm-oil_cooking-the-climate/ . Accessed Aug 8, 2010.
  • Hagenimana V, Carey EE, Gichuki ST, Oyunga MA, Immungi JK. 1999a. Carotenoid contents in fresh, dried, and processed sweet potato products. Eco Food Nutr 37:45573.
  • Hagenimana V, K’Osambo LM, Carey EE. 1999b. Potential of sweet potato in reducing vitamin A deficiency in Africa. In: Kearl S, Graves C, editors. International Potato Center. Impact on a changing world. Program report 1997–1998. Lima , Peru : Intl. Potato Center. p 28794.
  • Haskell MJ, Jamil KM, Hassan F, Peerson JM, Hossain MI, Fuchs GJ, Brown KH. 2004. Daily consumption of Indian spinach (Basella alba) or sweet potatoes has a positive effect on total-body vitamin A stores in Bangladeshi men. Am J Clin Nutr 80:7054.
  • Haskell MJ, Pandey P, Graham JM, Peerson JM, Shreshtha KA, Brown KH. 2005. Recovery from impaired dark adaptation in nightblind pregnant Nepali women who receive small daily doses of vitamin A as amaranth leaves, carrots, goat liver, vitamin A-fortified rice, or retinyl palmitate. Am J Clin Nutr 81:46171.
  • Hickenbottom SJ, Follett JR, Lin Y, Dueker SR, Burri BJ, Neidlinger TR, Clifford AJ. 2002. Variability in conversion of beta-carotene to vitamin A in men as measured by using a double-tracer study design. Am J Clin Nutr 75:9007.
  • Ho CC, de Moura FF, Kim SH, Burri BJ, Clifford AJ. 2009. A minute dose of 14C-beta-carotene is absorbed and converted to retinoids in humans. J Nutr 139:14806.
  • Ho CC, de Moura FF, Kim SH, Clifford AJ. 2007. Excentral cleavage of beta-carotene in vivo in a healthy man. Am J Clin Nutr 85:7707.
  • Howe JA, Maziya-Dixon B, Tanumihardjo SA. 2009. Cassava with enhanced beta-carotene maintains adequate vitamin A status in Mongolian gerbils (Meriones unguiculatus) despite substantial cis-isomer content. Br J Nutr 102:3429.
  • Howe JA, Tanumihardjo SA. 2006. Carotenoid-biofortified maize maintains adequate vitamin A status in Mongolian gerbils. J Nutr 136:25627.
  • Huang CJ., Tang YL, Chen CY, Chen ML, Chu CH, Hseu CT. 2000. The bioavailability of beta-carotene in stir- or deep-fried vegetables in men determined by measuring the serum response to a single ingestion. J Nutr 130:53440.
  • Idindili B, Masanja H, Urassa H, Bunini W, van Jaarsveld P, Aponte JJ, Kahigwa E, Mshinda H, Ross D, Schellenberg DM. 2007. Randomized controlled safety and efficacy trial of 2 vitamin A supplementation schedules in Tanzanian infants. Am J Clin Nutr 85:13129.
  • Kafwembe EM, Chipipa J, Njunju E, Chilengi R. 2009. The vitamin A status of Zambian children in a community of vitamin A supplementation and sugar fortification strategies as measured by the modified relative dose response (MRDR) test. Int J Vitam Nutr Res 79:407.
  • Kapinga R, Ndunguru J, Mulokozi G, Tumwegamire S. 2009. Impact of common sweet potato viruses on total carotenoids and root yields of an orange-fleshed sweet potato in Tanzania. Sci Hort 122:15.
  • Kidmose U, Agili S, Thilsted SH. 2009. Beta-carotene in orange-fleshed sweet potato from different locations in Kenya and stored using different methods. Ann Nutr Metab 55:376.
  • Kidmose U, Christensen LP, Agili SM, Thilsted SH. 2007. Effect of home preparation practices on the content of provitamin A carotenoids in coloured sweet potato varieties (Ipomoea batatas Lam.) from Kenya. Innov Food Sci Emerg Tech 8:399406.
  • Kidmose U, Yang RY, Thilsted SH, Christensen LP, Brandt K. 2006. Content of carotenoids in commonly consumed Asian vegetables and stability and extractability during frying. J Food Comp Anal 19:56271.
  • Klemm RD, West KP Jr, Palmer AC, Johnson Q, Randall P, Ranum P, Northrop-Clewes C. 2010. Vitamin A fortification of wheat flour: considerations and current recommendations. Food Nutr Bull 31(Suppl1):S4761.
  • K’osambo LM, Carey EE, Mirsa AK, Wilkes J, Hagenimana V. 1998. Influence of age, farming site, and boiling on pro-vitamin A content of sweet potato (Ipomoea batatas (L.) Lam) storage roots. J Food Comp Anal 11:30521.
  • Kudoh Y, Matsuda S. 2000. Effect of lactic acid bacteria on color tone and anthocyanin content of sweet potato yoghurt. J Jap Soc Food Sci Tech-Nippon Shokuhin Kagaku Kogaku Kaishi 47:61925.
  • Lako J, Trenerry VC, Wahlqvist M, Wattanapenpaiboon N, Sotheeswaran S, Premier R. 2007. Phytochemical flavonols, carotenoids, and the antioxidant properties of a wide selection of Fijian fruit, vegetables and other readily available foods. Food Chem 101:172741.
  • Laurie SM, Magoro MD. 2008. Evaluation and release of new sweet potato varieties through farmer participatory selection. African J Agric Res 3:6726.
  • Lee CM, Boileau AC, Boileau TW, Williams AW, Swanson KS, Heintz KA, Erdman JW Jr. 1999. Review of animal models in carotenoid research. J Nutr 129:22717.
  • Lietz G, Lange J, Rimbach G. 2010. Molecular and dietary regulation of beta, beta-carotene 15,15′-monooxygenase 1 (BCMO1). Arch Biochem Biophys 502:816.
  • Lin Y, Dueker SR, Burri BJ, Neidlinger TR, Clifford AJ. 2000. Variability of the conversion of beta-carotene to vitamin A in women measured by using a double-tracer study design. Am J Clin Nutr 71:154554.
  • Liu SC, Lin JT, Yang DJ. 2009. Determination of cis- and trans- alpha- and beta-carotenoids in Taiwanese sweet potatoes (Ipomoea batatas (L.) Lam.) harvested at various times. Food Chem 116:60510.
  • Loechl CU, Hotz C, Lubowa A, Sison C, Gilligan D, Meenakshi JV. 2009. Introduction of orange sweet potato in Uganda could improve vitamin A intakes of vulnerable groups. Ann Nutr Metab 55:376.
  • Low JW, Arimond M, Osman N, Cunguara B, Zano F, Tschirley DA. 2007a. Ensuring the supply of and creating demand for a biofortified crop with a visible trait: lessons learned from the introduction of orange-fleshed sweet potato in drought-prone areas of Mozambique. Food Nutrition Bulletin 28:S25870.
  • Low JW, Arimond M, Osman N, Cunguara B, Zano F, Tschirley D. 2007b. A food-based approach introducing orange-fleshed sweet potatoes increased vitamin A intake and serum retinol concentrations in young children in rural Mozambique. J Nutr 137:13207.
  • Low JW, van Jaarsveld PJ. 2008. The potential contribution of bread buns fortified with beta-carotene-rich sweet potato in Central Mozambique. Food Nutr Bull 29:98107.
  • Marceau G, Gallot D, Lemery D, Sapin V. 2007. Metabolism of retinol during mammalian placental and embryonic development. Vitam Horm 75:97115.
  • Mark M, Ghyselinck NB, Chambon P. 2009. Function of retinoic acid receptors during embryonic development. Nucl Recept Sign [serial online] 7:e002, NURSA. Available from: http://www.nursa.org/template.cfm?threadId=6 .
  • McGrane MM. 2007. Vitamin A regulation of gene expression: molecular mechanism of a prototype gene. J Nutr Biochem 18:497508.
  • Mills JP, Tumuhimbise GA, Jamil KM, Thakkar SK, Failla ML, Tanumihardjo SA. 2009. Sweet potato beta-carotene bioefficacy is enhanced by dietary fat and not reduced by soluble fiber intake in Mongolian gerbils. J Nutr 139:4450.
  • Mohapatra S, Panda SH, Sahoo SK, Sivakumar PS, Ray RC. 2007. Beta-carotene-rich sweet potato curd: production, nutritional and proximate composition. Internat J Food Sci Tech 42:130514.
  • Montrone M, Martorelli D, Rosato A, Dolcetti R. 2009. Retinoids as critical modulators of immune functions: new therapeutic perspectives for old compounds. Endocr Metab Immune Disord Drug Targ 9:11331.
  • Mudur G. 2001. Deaths trigger fresh controversy over vitamin A programme in India. Brit Med J 323:1206.
  • Naico ATA, Lusk JL. 2010. The value of a nutritionally enhanced staple crop: results from a choice experiment conducted with orange-fleshed sweet potatoes in Mozambique. J African Econ 19:53658.
  • Naqvi S, Zhu C, Farre G, Ramessar K, Bassie L, Breitenbach J, Perez Conesa D, Ros G, Sandmann G, Capell T, Christou P. 2009. Transgenic multivitamin corn through biofortification of endosperm with three vitamins representing three distinct metabolic pathways. Proc Natl Acad Sci USA 106:77627.
  • O’Connell OF, Ryan L, O’Brien NM. 2007. Xanthophyll carotenoids are more bioaccessible from fruits than dark green vegetables. Nutr Res 27:25864.
  • Oguntibeju OO, Esterhuyse AJ, Truter EJ. 2009. Red palm oil: nutritional, physiological and therapeutic roles in improving human well-being and quality of life. Br J Biomed Sci 66:21622.
  • Pedro MR, Madriaga JR, Barba CV, Habito RC, Gana AE, Deitchler M, Mason JB. 2004. The National Vitamin A Supplementation Program and subclinical vitamin A deficiency among preschool children in the Philippines. Food Nutr Bull 25:31929.
  • Porter-Dosti M, Mills JP, Simon PW, Tanumihardjo SA. 2006. Bioavailability of beta-carotene (BC) from purple carrots is the same as typical orange carrots while high BC carrots increase BC stores in Mongolian gerbils (Meriones unguiculatus). Br J Nutr 96:25867.
  • Ray RC, Sivakumar PS. 2009. Traditional and novel fermented foods and beverages from tropical root and tuber crops: review. Internat J Food Sci Tech 44:107387.
  • Ribaya-Mercado JD, Solon FS, Solon MA, Cabal-Barza MA, Perfecto CS, Tang G, Solon JAA, Fjeld C, Russell R. 2000. Bioconversion of plant carotenoids to vitamin A in Filipino school-aged children varies inversely with vitamin A status. Am J Clin Nutr 72:45565.
  • Ritter E, Elgeti M, Bartl FJ. 2008. Activity switches of rhodopsin. Photochem Photobiol 84:91120.
  • Rodriguez-Amaya DB. 1997. Carotenoids and food preparation: the retention of provitamin A carotenoids in prepared, processed, and stored food. USAID, OMNI Project. Arlington Va. : John Snow Inc. 88 p.
  • Rodriguez-Amaya DB. 2003. Food carotenoids; analysis, composition and alterations during storage and processing foods. Forum Nutr 56:357.
  • Ruel MT. 2001. Can food-based strategies help reduce vitamin A and iron deficiencies? A review of recent evidence. Washington , D.C. : Intl. Food Policy Research Inst. 77 p.
  • Sandhill Preservation Center. 2010. Sweet potatoes [Internet]. Calamus , Iowa : Sandhill Preservation Center. Available from: http://www.sandhillpreservation.com/catalog/sweet_potatoes.html . Accessed Sept 9, 2010.
  • Semba RD, de Pee S, Sun K, Akhter N, Bloem MW, Raju VK. 2010. Coverage of vitamin A capsule programme in Bangladesh and risk factors associated with non-receipt of vitamin A. J Health Popul Nutr 28:1438.
  • Sommer A, Davidson FR. 2002. Assessment and control of vitamin A deficiency: the Annecy Accords. J Nutr 132: 2845S50S.
  • Sommer A, West KP, Olson JA, Ross AC. 1996. Vitamin A deficiency: health, survival and vision. New York : Oxford Univ. Press. 438 p.
  • Stein AJ, Sachdev HPS, Qaim M. 2006. Potential impact and cost effectiveness of Golden Rice. Nature Biotech 24:12001, and supplementary material.
  • Sulaeman A, Keeler L, Giraud DW, Taylor SL, Driskell JA. 2003. Changes in carotenoid, physicochemical and sensory values of deep-fried carrot chips during storage. Internat J Food Sci Tech 38:603613.
  • Takahata Y, Noda T, Nagata T. 1993. HPLC determination of beta-carotene content of sweet-potato cultivars and its relationship with color values. Jap J Breed 43:4217.
  • Tanumihardjo SA. 2008. Food-based approaches for ensuring adequate vitamin A nutrition. Comp Rev Food Sci Food Safety 7:37381.
  • Tanumihardjo SA, Bouis H, Hotz C, Meenakshi JV, McClafferty B. 2008. Biofortification of staple crops: an emerging strategy to combat hidden hunger. Comp Rev Food Sci Food Safety 7:32934.
  • Teow CC, Truong VD, McFeeters RF, Thompson RL, Pecota KV, Yencho GC. 2007. Antioxidant activities, phenolic and beta-carotene contents of sweet potato genotypes with varying flesh colours. Food Chem 103:82938.
  • Thakkar SK, Maziya-Dixon B, Dixon AG, Failla ML. 2007. Beta-carotene micellarization during in vitro digestion and uptake by Caco-2 cells is directly proportional to beta-carotene content in different genotypes of cassava. J Nutr 137:222933.
  • Thoenes P, FAO Commodities and Trade Division. 2006. Biofuels and commodity markets – palm oil focus. Geneva : Food and Agriculture Organization. Available from: http://www.rlc.fao.org/es/prioridades/bioenergia/pdf/commodity.pdf . Accessed Aug 2, 2010.
  • Travis GH, Golczak M, Moise AR, Palczewski K. 2007. Diseases caused by defects in the visual cycle: retinoids as potential therapeutic agents. Annu Rev Pharmacol Toxicol 47:469512.
  • Tumuhimbise GA, Namutebi A, Muyonga JH. 2009. Microstructure and in vitro beta- carotene bioaccessibility of heat-processed orange-fleshed sweet potato. Plant Foods Hum Nutr 64:3128.
  • United Nations Childrens Fund (UNICEF). 2004. Micronutrient Initiative. Vitamin and mineral deficiency, a global progress report [Internet]. Ottawa , Canada : UNICEF. Available from: http://www.micronutrient.org/CMFiles/PubLib/VMd-GPR-English1KWW-3242008-4681.pdf . Accessed Oct 20, 2009.
  • United States Dept. of Agriculture (USDA). 2010. Agricultural research service (ARS). National nutrient database for standard reference, release 22 [Internet]. Washington , D.C. : USDA ARS. Available from: http://www.nal.usda.gov/fnic/foodcomp/search/ . Accessed Aug 20, 2010.
  • USDA, Economic Research Service (ERS). 20052010. US Sweet potato statistics [Internet]. Washington D.C. : USDA ERS. Available from: http://usda.mannlib.cornell.edu/MannUsda/viewDocumentInfo.do?documentID=1492 . Accessed Sept 17, 2010.
  • United States Inst. of Medicine, (USIOM) Food and Nutrition Board. 2000. Dietary reference intakes for vitamin A, vitamin K, arsenic, boron, chromium, copper, iodine, iron, manganese, molybdenum, nickel, silicon, vanadium, and zinc. Washington , D.C. : Natl. Academy Press. 773 p.
  • Valdez C, Lopez CY, Schwartz S, Bulux J, Solomons NW. 2001. Sweet potato buds: the origins of a “designer” food to combat hypovitaminosis A in Guatemala. Processing, vitamin A content and preservation characteristics. Nutr Res 21:6170.
  • Vallabhaneni R, Gallagher CE, Licciardello N, Cuttriss AJ, Quinlan RF, Wurtzel ET. 2009. Metabolite sorting of a germplasm collection reveals the hydroxylase3 locus as a new target for maize provitamin A biofortification. Plant Physiol 151:163545.
  • van den Berg H, Faulks R, Granado HF, Hirschberg J, Olmedilla B, Sandmann G, Southon S, Stahl W. 2000. The potential for the improvement of carotenoid levels in foods and the likely systemic effects. J Sci Food Agric 80:880912.
  • van Heerden PD, Laurie R. 2008. Effects of prolonged restriction in water supply on photosynthesis, shoot development and storage root yield in sweet potato. Physiol Plant 134:99109.
  • van Jaarsveld PJ, Faber M, Tanumihardjo SA, Nestel P, Lombard CJ, Benade AJ. 2005. Beta-carotene-rich orange-fleshed sweet potato improves the vitamin A status of primary school children assessed with the modified-relative-dose-response test. Am J Clin Nutr 81:10807.
  • van Jaarsveld PJ, De Wet M, Hamse E, Nestel P, Rodriguez-Amaya DB. 2006. Retention of beta-carotene in boiled, mashed orange-fleshed sweet potato. J Food Comp Anal 19:3219.
  • Veda S, Kamath A, Kamath A, Platel K, Begum K, Srinivasan K. 2006. Determination of bioaccessibility of beta-carotene in vegetables by in vitro methods. Mol Nutr Food Res 50:104752.
  • Watanabe K, Toki T, Ino M, Hirota S, Takahashi B. 1999. Changes in beta-carotene content and beta-carotene isomer composition in sweet potato during storage. J Jap Soc Hort Sci 68:10446.
  • West KP Jr. 2002. Extent of vitamin A deficiency among preschool children and women of reproductive age. J Nutr 132:2857S66S.
  • Wilson CD, Pace RD, Bromfield E, Jones G, Lu JY. 1998. Sweet potato in a vegetarian menu plan for NASA's Advanced Life Support Program. Life Support Biosph Sci 5:34751.
  • Wood AW. 2002. The ecology of Huli subsistence agriculture. P N G Med J 45:1543.
  • Wolgemuth DJ, Chung SS. 2007. Retinoid signaling during spermatogenesis as revealed by genetic and metabolic manipulations of retinoic acid receptor alpha. Soc Reprod Fertil Suppl 63:1123.
  • Woolfe JA. 1992. Sweet potato: an untapped food resource. New York : Cambridge Univ. Press. 694 p.
  • World Health Organization (WHO). 1995. Global prevalence of vitamin A deficiency. Micronutrient Deficiency Information System (MDIS) Working Paper 2 [Internet]. Geneva : WHO. Available from: http://www.who.int/nutrition/publications/vad_global_prevalence/en/index.html . Accessed Aug 6, 2010.
  • WHO and FAO. 2004. Vitamin and mineral requirements in human nutrition. Second edition [Internet]. Geneva : WHO. Available from: http://whqlibdoc.who.int/publications/2004/9241546123.pdf . Accessed 2010 Aug 30, 2010.
  • WHO. 2009. Global prevalence of vitamin A deficiency in populations at risk 1995–2005. WHO global database on vitamin A deficiency [Internet]. Geneva : WHO, c2000–2009. Available from: http://whqlibdoc.who.int/publications/2009/9789241598019_eng.pdf . Accessed 2010 Aug 19, 2010.
  • Wu X, Sun CJ, Yang LH, Zeng G, Liu ZY, Li YM. 2008. Beta-carotene content in sweet potato varieties from China and the effect of preparation on beta-carotene retention in the Yanshu. Innov Food Sci Emerg Techn 9:5816.
  • Yan J, Kandianis CB, Harjes CE, Bai L, Kim EH, Yang X, Skinner DJ, Fu Z, Mitchell S, Li Q, Fernandez MG, Zaharieva M, Babu R, Fu Y, Palacios N, Li J, Dellapenna D, Brutnell T, Buckler ES, Warburton ML, Rocheford T. 2010. Rare genetic variation at Zea mays crtRB1 increases beta-carotene in maize grain. Nat Genet 42:3227.
  • Zeba AN, Martin Prével Y, Somé IT, Delisle HF. 2006. The positive impact of red palm oil in school meals on vitamin A status: study in Burkina Faso. Nutr J 5:17.
  • Zeng G, Lin L, Liu ZY, Yan L, Lan Z, Sun CJ. 2009. The effect of beta-carotene-rich sweet potato on serum retinol concentration in rural Chinese children. Ann Nutr Metab 55:119.