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Level of Effort: Medium

You have lots of delicious foods to eat, but you will have to give up many foods you may be used to.

Limitations: This diet may be a big change for you, considering you're giving up so many foods -- basically, anything made with flour or sugar.

Cooking and shopping: Perricone wants you to buy organic as much as possible. This can cost more. Keeping fresh produce and seafood on hand may mean more trips to the grocery store.

Packaged foods or meals: None, except for Perricone’s brand of supplements. Supplements are an important part of Perricone’s plan. You have to take a packet of eight supplements, plus an extra omega-3 supplement, an hour before every meal. That’s 27 supplements a day.

In-person meetings: None.

Exercise: You'll do at least 30 to 45 minutes of physical activity three times a week.

Does It Allow for Dietary Restrictions or Preferences?

Vegetarians and vegans: Vegetarians and vegans can get omega-3 from sources other than fish, such as walnuts, flaxseed, soybeans, canola or soybean oil, or vegetarian omega-3 supplements.

Gluten-free: Wheat and other high-gluten grains are on the do-not-eat list. Instead, Perricone prefers gluten-free buckwheat and oats. Still, you'll need to check food labels to avoid gluten completely.

What Else You Should Know

Costs: If you decide to get Perricone’s supplement packets, a 30-day supply costs $200. A 30-day supply of his omega-3 supplements costs $38. Shipping is free.

Support: None.

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