What Is the Pizza Diet?

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Close-up of pizza slice on spatula.
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Eating pizza every day for weight loss sounds like a dream come true. People who are trying to change their bodies or lose weight on the pizza diet are hoping the dream becomes a reality. Since pizza comes in endless varieties, it seems possible that it could be engineered for weight loss.

What Experts Say

"Several variations of the pizza diet exist, where people eat only pizza for all meals over a short time frame. Experts warn that any diet which focuses on just one food is not sustainable or nutritious. Pizza can fit in a healthy diet, but you should include a variety of other foods, too."
Chrissy Carroll, RD, MPH

Background

There are a few versions of the pizza diet. Pizza shop owner Matt McClellan made headlines in 2010 with his 30-day pizza diet. He consumed eight slices of pizza every day for a month, but kept the toppings relatively healthy. So toppings like sausage and pepperoni were a no-go and toppings like broccoli, chicken, and skim cheese stayed on the menu. He also increased his activity level. He lost weight, and then bicycled from Florida to New York City to promote the power of pizza.

Later, another pizza maker, Pasquale Cozzolino, came up with his own version of the pizza diet. He gave up baked goods and soda (he had been drinking two or three cans a day) and switched to a Mediterranean diet that included one Neapolitan pizza a day. The pie was made with just a few fresh ingredients and a dough that was left to ferment for 36 hours, so the crust was naturally lower in sugar and easier to digest. Cozzolino lost almost 100 pounds.

A few magazines also reported a "pizza cleanse" trend. One writer, for example, gave up alcohol and sugar but ate as much pizza (and only pizza) as she wanted for a week. She reported that she lost five pounds.

How It Works

As noted, there are lots of ways to interpret the pizza diet. Doughy pies topped with lots of fatty cheese and meat are one thing, while thin, whole-grain crusts laden with vegetables and a drizzle of olive oil are something else.

What to Eat

Compliant Foods

  • Pizza

  • Vegetables (on top or on the side)

Non-Compliant Foods

  • High-fat toppings

  • Sugar

  • Alcohol

Pizza

There's a big difference between the McClellan-style (all pizza) and Cozzolino-style (healthy eating that includes pizza) pizza diets. But any time you restrict your food intake, you're likely to see some weight loss. If you eat an all-pizza diet, for example, that means you won't be eating ice cream, potato chips, sugary baked goods, fatty fried foods, and other indulgent items.

Also, when you limit your food intake to a single food, you're likely to get sick of it and eat less as a result. Eating pizza all the time sounds like a great idea on day one of the diet. But it's likely to get old by day three or day four.

Vegetables

While pizza isn't usually considered a low-calorie food, you can make it healthy by topping it with vegetables and other low-fat ingredients. Both McClellan and Cozzolino used this approach. You could also make sure to have your slice with a side salad or bowl of roasted veggies.

High-Fat Toppings

Skipping the pepperoni and sausage can also make your pizza fit better into a healthy diet.

Sugar and Alcohol

A big part of the seven-day pizza cleanse was the ban on alcohol and sugar. This cuts a lot of calories and carbs, leaving room to consume them from pizza instead.

Pros and Cons

Pros

  • Pizza is tasty and cheap

Cons

  • Too restrictive

  • Could increase cravings

  • Could cause weight gain

Pros

Popularity

Pizza is popular because it's good! It's readily available, often inexpensive, and can be varied in a million ways. No wonder people are looking for ways to make it a diet food, too.

But of course, any diet that includes only one food or that eliminates entire groups of nutritious food is generally not healthy or sustainable.

Cons

Restrictive

The body just wasn't made to eat only one thing, even something that can change a lot. The pizza diet doesn't have much of a place for fruit, fish, or grains other than wheat, for example.

Increased Cravings

Often, eating salty, starchy foods increases your cravings for those flavors. It's possible that during or after a pizza diet, you would add more salt to your food and crave "bad carbs" like fried or bready foods with little or no nutritional value.

Weight Gain

You might lose weight on a pizza diet as a result of reduced food intake. But an increase in your salt and starchy carbohydrate consumption could also cause you to retain water, and you could see a weight increase instead. You may also put on more fat. You probably won't see major changes to your body composition if you follow the pizza diet for a few days, but if you increase your fat consumption by eating more sausage, pepperoni, and cheese, you might notice more fat on your frame over time.

How It Compares

The pizza diet sounds a lot like some other mono diets (single-food eating plans) out there. Here's how they align with each other, and with expert advice on nutrition.

USDA Recommendations

Food Groups

The USDA guidelines suggest filling your plate with a balanced mix of protein, grains, fruits, vegetables, and dairy. Of course, a pizza can do that, especially if you remember that a tomato is a fruit. But it's not exactly the "whole food" that so many experts recommend.

Calories

The pizza diet doesn't have any associated calorie count, although Cozzolino says his custom-made daily pizza clocks in at under 600 calories. To lose weight, you need to create a calorie deficit, by burning more calories than you consume. (This is probably how McClellan's pizza diet worked; he increased his exercise level while also trimming the calorie count on the pizzas he ate.) To determine your own daily calorie target for weight loss, try this calculator.

Similar Diets

See how the pizza diet compares to other one-food-at-a-time diets, as well as the diet that was probably the real secret to pizza chef Pasquale Cozzolino's 100-pound weight loss.

Pizza Diet

  • What it is: The diet is open to interpretation, but at its heart is about eating a lot of pizza and limiting everything else.
  • Safety: In general, mono diets are not a good idea. And it would be unsafe to eat greasy, cheesy, meaty pizza at the expense of everything else But since pizzas are so variable, it might be possible to put together a pizza-centric meal plan that meets basic nutritional needs.
  • Effectiveness: Whether you can lose weight on a pizza diet will depend entirely on how you do it: What kind of pizza you eat, how much of it, what other foods you eat or restrict, how much exercise you get, and so on.

Taco Cleanse

  • What it is: Like the pizza diet, this one went viral, because it sounds like an amazing bargain: Eat tacos and lose weight! But the diet isn't about eating fast-food tacos for breakfast, lunch, and dinner. Instead, it's based on a vegan taco cookbook called "The Taco Cleanse," which isn't a diet at all. It's just a fun way to package a bunch of taco recipes.
  • Safety: You can put a lot of different ingredients inside a taco, just like you can on a pizza. (The same goes for a taco shell and a pizza crust.) So the safety of this diet depends on what you choose. A daily diet of ground beef, flour tortillas, and taco sauce would be unhealthy. But since the cookbook is vegan, following it could help you eat a plant-based, nutrient-rich diet.
  • Effectiveness: This particular taco cleanse might help you lose weight, especially if it means cutting refined starches and fatty meats out of your diet.

Egg Diet

  • What it is: This can be a mono diet, in which users eat only eggs, and nothing else. Or it can be part of a keto plan of combining eggs with butter and cheese. or a low-carb plan of eating vegetables, eggs, and other lean proteins.
  • Safety: Eggs do provide protein, fat, and some important vitamins and minerals. But on their own, they're not nearly enough for a healthy diet.
  • Effectiveness: As with other mono diets, you might lose weight on an egg diet, because you're limiting so many other foods. But you will likely be miserable eating this way, and unable to continue or to maintain the loss.

Mediterranean Diet

  • What it is: Based on the traditional eating patterns of people living in the Mediterranean region, this diet is full of healthy ingredients: Whole grains, vegetables, seafood, olives and olive oil, legumes and nuts. It focuses on whole foods, simple preparations, and lots of veggies, which makes it very rich in nutrients and fiber.
  • Safety: This diet is very safe. While it is not a formal eating plan, it drew the notice of the World Health Organization because people in the region tended to live long lives. Research has shown it to be heart-healthy.
  • Effectiveness: Especially if you switch to this diet from a traditional North American one that's heavy on red meat and refined carbs, it is likely to help you lose weight.

A Word From Verywell

Can you include healthy pizza in a weight loss diet? Yes! But should you eat it every day, all day for a week or a month? Probably not. For that reason, the pizza diet is not healthy.

But that doesn't mean that you can't eat pizza. Pick one night during the week and experiment with healthy pizza recipes that include whole grain crust (packed with fiber) and plenty of colorful vegetables. You'll enjoy the indulgence of a comfort food and still gain the benefit of maintaining a healthy diet for long-term health and wellness.

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