I read the same book. I agree with the diary for a variety of reasons. Fish no. You need Omega 3 fats that come from fish like salmon (wild caught) and sardines (canned). You can substitute ground flax seed if you limit fish. I do 6 grams of ground flax per day in my breakfast. start with 3 and work to 6 then to 12. spread it out over a couple of months.