Read the following paragraph and answer the question. Give ONLY the answer, no other words or explanation.

For example:

Answer: <most likely answer, as short as possible>.

Paragraph: 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 ?
They tend to have a myriad of chemicals .
The paragraph does not provide enough information to determine why commercially prepared products should be avoided.