Castenmiller, J., West, C., Linssen, J., Hof, K. v. h., & Voragen, A. (1999). food matrix of spinach is a limiting factor in determining the bioavailability of beta-carotene and to a lesser extent of lutein in humans. The Journal of nutrition, 129(2), 349-355. https://doi.org/10.1093/jn/129.2.349
Chicago Style (17th ed.) CitationCastenmiller, J.J.M, C.E West, J.P.H Linssen, K.H. van het Hof, and A.G.J Voragen. "Food Matrix of Spinach Is a Limiting Factor in Determining the Bioavailability of Beta-carotene and to a Lesser Extent of Lutein in Humans." The Journal of Nutrition 129, no. 2 (1999): 349-355. https://doi.org/10.1093/jn/129.2.349.
MLA (9th ed.) CitationCastenmiller, J.J.M, et al. "Food Matrix of Spinach Is a Limiting Factor in Determining the Bioavailability of Beta-carotene and to a Lesser Extent of Lutein in Humans." The Journal of Nutrition, vol. 129, no. 2, 1999, pp. 349-355, https://doi.org/10.1093/jn/129.2.349.