Abstract
Phytic acid, the hexaphosphate of myo-inositol, is the most important phosphate reserve compound in many plant seeds, but many of its salts are poorly digested by animals. It can form complexes with seed proteins, some of which sequester metal ions, making them unavailable for the animal organism. Soya protein isolates may be higher in phytate content than the soya flour from which they are obtained. Zinc is the mineral of most concern because its bioavailability from some soya products is quite low and because of its marginal levels in some human diets. The availability of iron from soya flour and soya isolates is higher than that from some other plant foods with lower phytate contents. Processes for removing the larger part of the tightly bound phytates from soya protein isolates are described.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Harborne, J.B., “Introduction to Ecological Biochemistry,” Academic Press, New York and London, 1977, p. 58.
Erdman, J.W., Jr., JAOCS 56:736 (1979).
O’Dell, B.L., in “Soy Protein and Human Nutrition,” Academic Press, New York and London, 1979, p. 187.
Rackis, J.J., and R.L. Anderson, Food Prod. Dev. 11:38 (1977).
Oberlease, D., in “Toxicants Occurring Naturally in Foods,” NAS, Washington, DC, 1973, p. 363.
Ellis, R., E.R. Morris and C. Philpot, Anal. Chem. 77:536 (1977).
Davies, N.T., and H. Reid, Brit. J. Nutr. 41:579 (1979).
Makover, R.U., Cereal Chem. 47:288 (1970).
Ellis, R., and E.R. Morris, Nutr. Rep. Int. 20:739 (1979).
Rotruck, J.T., and K.R. Lursen, J. Agric. Food Chem. 27:27 (1979).
Steinke, F.N., and D.T. Hopkins, J. Nutr. 108:481 (1978).
Mellanby, E., J. Physiol. 109:488 (1949).
Momcilovic, B., Belonje, A. Giraux and B.G. Shah, Nutr. Rep. Int. 12:197 (1975).
Taylor, T.G., and J.W. Coleman, Brit. J. Nutr. 42:113 (1979).
Lo, G.S., F.H. Steinke and D.T. Hopkins, J. Nutr. 110:829 (1980).
Forbes, R.M., and H.M. Parker, Nutr. Rep. Int. 5:681 (1977).
Erdman, J.W., Jr., K.E. Weingartner, H.M. Parker and R.M. Forbes, Fed. Proc. 37:891 Abst. No. 3563 (1978).
Oberlease, D., M.E. Muhrer and B.L. O’Dell, J. Nutr. 90:56 (1966).
Davies, N.T., and S.E. Olpin, Brit. J. Nutr. 41:590 (1979).
Hambridge, K.M., P.A. Walvavens, R.M. Brown, J. Webster, S. White, M. Anthony and M.L. Roth, Am. J. Clin. Nutr. 29:734 (1976).
Hartman, G.H., JAOCS 56:734 (1979).
Ford, J.R., G.C. Mustakas and R.D. Schmutz, Ibid. 55:371 (1978).
De Rham and T. Jost, J. Food Sci. 44:596 (1979).
Pileggi, V.J., Arch. Biochem. Biophys. 80:1 (1959).
Magee, A.C., and F.P. Graininger, Nutr. Rep. Int. 20:771 (1979).
Author information
Authors and Affiliations
About this article
Cite this article
Jaffe, G. Phytic acid in soybeans. J Am Oil Chem Soc 58, 493–495 (1981). https://doi.org/10.1007/BF02582411
Issue Date:
DOI: https://doi.org/10.1007/BF02582411