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The 3 Day Diet

By Kathleen M. Zelman, MPH, RD, LD
WebMD Expert Review

What It Is

Surprisingly surviving the test of time, the 3 Day Diet is another fad diet, dating back to 1985. Copies of the "3 Day Diet" continue to float around cyberspace, promising quick weight loss, cleansing, lower cholesterol, and increased energy. However, no diet book exists to substantiate the science behind the "unique metabolic reaction."

Often mistakenly called The Cleveland Clinic Diet, the 3 Day Diet is a regimented plan that must be followed exactly for three days at a time, followed by normal eating for four or five days before opting to resume the plan again.

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Followers of the 3 Day Diet are promised up to a 10 pound weight loss in three days, although realistically, most of that weight is likely due to fluid loss and not the more desirable fat loss. To achieve the proposed loss, exercise is not mentioned in the plan.

What You Can Eat

The 3 Day Diet is a very specific food plan that must be followed precisely. Portions must be eaten exactly as specified and dieters are warned not to overeat -- otherwise the promised 10 pound weight loss may not be achieved. Likewise, dieters should not under-eat, even if they are not hungry. The detailed plan does not mention or recommend any exercise.

The 3 Day Diet meal plan:

Day 1

Breakfast

Black coffee or tea, with 1-2 packets Sweet & Low or Equal

1/2 grapefruit or juice

1 piece toast with 1 tablespoon peanut butter

Lunch

1/2 cup tuna

1 piece toast

Black coffee or tea, with 1-2 packets Sweet & Low or Equal

Dinner

3 ounces any lean meat or chicken

1 cup green beans

1 cup carrots

1 apple

1 cup regular vanilla ice cream

Day 2

Breakfast

Black coffee or tea, with 1-2 packets Sweet & Low or Equal

1 egg

1/2 banana

1 piece toast

Lunch

1 cup cottage cheese or tuna

8 regular saltine crackers

Dinner

2 beef franks

1 cup broccoli or cabbage

1/2 cup carrots

1/2 banana

1/2 cup regular vanilla ice cream

Day 3

Breakfast

Black coffee or tea, with 1-2 packets Sweet & Low or Equal

5 regular saltine crackers

1 ounce cheddar cheese

1 apple

Lunch

Black coffee or tea, with 1-2 packets Sweet & Low or Equal

1 boiled egg

1 piece toast

Dinner

1 cup tuna

1 cup carrots

1 cup cauliflower

1 cup melon

1/2 cup regular vanilla ice cream

In addition to its strict daily food prescription, dieters drink 4 cups of water or noncaloric drinks daily.

How It Works

By some unspecified magical force, the combination of the suggested foods included in this plan is supposed to create a unique metabolic reaction and boost fat burning.

Without an author or book, there is no documentation or explanation of how the 3 Day Diet food combinations burn fat, increase energy, cleanse the body, or lower cholesterol.

As the name suggests, the 3 Day Diet lasts only three days, though it's said that it can be repeated indefinitely, as long as you alternate with 4-5 days of undefined "normal eating." The purpose of returning to your usual eating style is to keep your metabolism from slowing, reverting to fat-storing, starvation mode.

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