The storage stability of vitamins and minerals are impaired by cooking (Lugwigshafen et al. 1984). Phospholipids found in the cell walls of plant and animal material and essential for the health of each living cell are also broken down by heat. Phospholipids are needed in great quantities by the immune system, especially in the formation of pus in infected wounds (Pond, 2000).
Lugwigshafen, N. A. Bonn, G. B. Elmshorn, D. D. Hess.Oldend, W. K. Cuxhaven, K. K. Grenzach, H. L. 1984 Vitamins in Animal Nutrition, AWT, Bonn p42
Pond, C. M. 2000 The Fats of Life, Cambridge University Press, Cambridge p5-26