Daily consumption of orange-fleshed sweet potato for 60 days increased plasma ß-carotene concentration but did not increase total body vitamin A pool size in Bangladeshi women.
Jamil KM, Brown KH, Jamil M, Peerson JM, Keenan AH, Newman JW, Haskell MJ. Daily consumption of orange-fleshed sweet potato for 60 days increased plasma ß-carotene concentration but did not increase total body vitamin A pool size in Bangladeshi women. J Nutr. 2012 Oct; 142(10):1896-902.