These include nonfat dairy products or processed foods . Finally , there are foods that you should absolutely avoid . These include meat , margarine or other oil products , avocadoes , nuts , dairy products , olives , sugar and alcohol . You should also avoid products that are commercially prepared .

Question: Why should the recipient avoid commercially prepared products ?
Answer: None of the above choices .They tend to be a cheaper option .They tend to have a low fat content .They tend to consist of unhealthy ingredients .