PART I - What Should I Eat?
RULE #6 - Avoid food products that contain more than five ingredients.
The specific number you adopt is arbitrary, but the more ingredients in a packaged food, the more highly processed it probably is. Note 1: A long list of ingredients in a recipe is not the same thing; that's fine. Note 2: Some products now boast, somewhat deceptively, about their short ingredient lists. Haagen-Dazs has a new line of ice cream called "five." Great - but it's still ice cream. Same goes for the the three-ingredient Tostitos corn chips advertised by Frito-Lay - okay, but they're still corn chips. In such cases, apply Rule #60 for dealing with treats and special occasion foods.
"Eat food. Not too much. Mostly plants."