At the end of the six-week period, the second group of 5 rats was switched to a diet of menhaden fish oil (35% of total calories), protein (about 25% of total calories) and dextrose (remainder of total calories) for two weeks with vitamins and minerals continued as before. The menhaden fish oil was found by analysis to contain the following percentages of fatty acids (total fatty acid basis): 0.2% C12:0, 10.3% C14:0, 1.1% C15:0, 20.0% C16:0, 1.2% C17:0, 3.4% C18:0, 2.1% C20:0, 14.8% C16:1, 0.3% C17:1, 12.3% C18:1, 2.6% C20:1, 0.6% C22:1, 0.2% C24:1, 1.6% C16:2, 2.0% C18:2, 3.7% C18:3, 0.5% C20:2, 0.4% C20:3, 0.7% C20:4, 9.8% C20:5, 1.8% C22:5, 6.1% C22:6 and 1.6% unknown and C19:1 alcohol, providing totals of 38.3% saturated fatty acid and 26.6% polyunsaturated fatty acid. At the end of the two-week period, the five rats of this group were sacrificed and determinations were made as described below.
