The body reset diet is a 15-day weight loss plan built around smoothies, simple meals, and daily walking. Created by celebrity trainer Harley Pasternak, the program uses caloric restriction and phased food reintroduction to jumpstart rapid fat loss in under three weeks for any fitness level.
The plan splits into three 5-day phases that progress from all-liquid meals to structured solid food. Each smoothie delivers balanced protein, fiber, and healthy fats in a single glass. Followers report losing 10 to 15 pounds (4.5 to 6.8 kg) in the first two weeks, but nutrition experts classify the program as a fad diet with a high weight regain rate.
The body reset diet offers short-term results through structured simplicity. The real question is whether those results last beyond the final smoothie. This guide covers every phase, the science behind the claims, the risks, and exactly what to eat from day one through day fifteen.
What Is the Body Reset Diet?
The body reset diet is a 15-day smoothie-based eating plan. Celebrity trainer Harley Pasternak designed the program to trigger rapid weight loss through caloric restriction and moderate exercise. Here’s the basic idea: three 5-day phases gradually shift from liquid meals to solid food while keeping you at 1,200 to 1,400 calories per day.
So how does it break down? The plan splits into three distinct phases. Phase 1 relies entirely on smoothies and snacks. Phase 2 swaps one smoothie for a solid meal. Phase 3 introduces two solid meals alongside a single smoothie. It’s a gradual transition, and that’s the point.
Daily calorie intake stays between 1,200 and 1,400 calories. If you’re over 175 pounds (79 kg), you get slight recipe modifications to account for higher metabolic needs. The restricted calorie range creates the deficit necessary for weight loss across the full 15-day program.
Body Reset Diet Phase Overview:
| Phase | Days | Smoothies | Solid Meals | Snacks |
|---|---|---|---|---|
| Phase 1 | 1-5 | 3 per day | 0 | 2 per day |
| Phase 2 | 6-10 | 2 per day | 1 per day | 2 per day |
| Phase 3 | 11-15 | 1 per day | 2 per day | 2 per day |
Who Created the Body Reset Diet?
Harley Pasternak developed the body reset diet in 2013. His graduate education covers exercise physiology, nutritional sciences, and kinesiology. Pasternak also created the popular 5-Factor Diet and works as a celebrity fitness trainer in Los Angeles.
And here is the best part: the Body Reset Diet book reached the New York Times bestseller list right after publication. A companion cookbook followed in 2014. Celebrity followers include Kim Kardashian and Rihanna, which brought massive mainstream attention to the smoothie-based weight loss approach.
How Does the Body Reset Diet Differ From Other Detox Plans?
The body reset diet maintains balanced macronutrients throughout every phase. Juice cleanses and standard detox plans strip calories and nutrients at the same time. But each body reset smoothie contains protein, fiber, and healthy fats. That keeps the nutritional profile intact even during the liquid-only first phase.
Here’s what most people miss: most detox programs skip physical activity entirely. The body reset diet requires 10,000 daily steps from day one. Progressive resistance training starts in Phase 2 at three sessions per week and ramps up to five sessions per week by Phase 3.
Now here’s the thing: registered dietitians note that the human body doesn’t need external detox assistance. The liver, kidneys, and lungs already filter and remove toxins without dietary intervention. The body reset diet markets itself as a metabolic reset rather than a traditional cleanse.
Key Differences From Standard Detox Plans:
- Balanced macronutrients in every smoothie (protein, fiber, healthy fats)
- Daily exercise requirement of 10,000 steps from day one
- Progressive resistance training starting in Phase 2
- Gradual reintroduction of solid food across three phases
- Maintenance plan with structured eating after the 15-day program
How Does the Body Reset Diet Work?
The body reset diet creates weight loss through caloric restriction. Daily intake drops to 1,200 to 1,400 calories while moderate exercise increases calorie expenditure. The smoothie format controls portions automatically by packing balanced macronutrients into pre-measured liquid meals.
Let me break that down. Each 5-day phase gradually reintroduces solid food into the meal plan. Phase 1 starts with smoothies and snacks only. Phase 2 adds one solid meal. Phase 3 replaces a second smoothie with another solid meal. The progression trains portion awareness and builds structured eating habits.
Every smoothie follows a specific nutritional formula. A liquid base (dairy or non-dairy milk) provides the foundation. Protein comes from powder or plain Greek yogurt. Fruits and vegetables deliver fiber. Nuts, seeds, or avocado supply healthy fats for satiety.
What Happens During Phase 1 of the Body Reset Diet?
Phase 1 restricts all meals to smoothies and snacks. Days 1 through 5 require three smoothies per day plus two approved crunchy snacks. Each snack delivers fiber, protein, and healthy fats to maintain satiety between liquid meals throughout the day.
The exercise requirement during Phase 1 stays minimal by design. Walking 10,000 steps per day is the only physical activity required. Why no resistance training yet? Pasternak avoids intense exercise early to prevent appetite stimulation during the lowest calorie intake window.
Most followers report the fastest weight loss during Phase 1. Is that surprising? Not really. The combination of lowest calorie intake and complete elimination of solid food creates the largest daily caloric deficit. Water weight loss also contributes to visible scale changes in the first five days.
What Changes in Phase 2 and Phase 3?
Phase 2 replaces one smoothie with a solid meal. Days 6 through 10 introduce one ‘S-meal’ format: salad, sandwich, soup, stir-fry, or scramble. Two smoothies and two snacks remain on the daily menu. Resistance training begins at three sessions per week alongside 10,000 daily steps.
Phase 3 shifts the balance further toward solid food. Days 11 through 15 feature one smoothie and two solid meals per day. Resistance training increases to five weekly sessions. This is the phase that builds the eating pattern designed for post-diet maintenance and long-term habits.
And after the 15 days? A maintenance phase begins. The plan allows two weekly ‘free meals’ where any food or drink is permitted. Smoothies remain part of daily eating alongside structured solid meals to preserve the nutritional framework you’ve built during the program.
Exercise Progression by Phase:
| Phase | Daily Steps | Resistance Training |
|---|---|---|
| Phase 1 | 10,000 | None |
| Phase 2 | 10,000 | 3 sessions per week |
| Phase 3 | 10,000 | 5 sessions per week |
Does the Body Reset Diet Help You Lose Weight?
Yes. The body reset diet does produce short-term weight loss. Many followers lose 10 to 15 pounds (4.5 to 6.8 kg) in the first two weeks. Weight loss occurs when calorie intake falls below calorie expenditure, and the 1,200 to 1,400 calorie daily target creates that deficit consistently.
But here’s the part most people miss. Long-term results depend entirely on post-diet eating habits. The 15-day program ends, but weight maintenance requires continued healthy eating. Most rapid weight loss diets see significant weight regain once participants return to unrestricted calorie consumption without structure.
To be clear, the body reset diet works effectively as a short-term weight loss tool. Medical professionals and dietitians don’t recommend it as a permanent eating plan. The calorie restriction level is too low for sustained daily function, and the smoothie-heavy format doesn’t reflect a balanced long-term diet.
What Does the Research Say About Rapid Weight Loss Diets?
Rapid early weight loss increases motivation to continue dieting. Pasternak built the body reset diet around this theory. Does the science back it up? Scientific research supports the idea that visible early results boost adherence rates and reduce dropout compared to gradual weight loss approaches.
U.S. News and World Report ranked the body reset diet number 40 out of 41 in Best Diets Overall. The publication gave it an overall score of 2 out of 5. One nutrition expert on the review panel called the program a ‘gimmick’ and an ‘unhealthy weight loss diet.’
This is important: no peer-reviewed study has directly tested the body reset diet. The claimed benefits rely on general caloric deficit principles rather than diet-specific clinical evidence. The lack of direct research makes definitive claims about metabolic reset effects impossible to verify.
What Are the Benefits of the Body Reset Diet?
The body reset diet simplifies meal preparation and decision-making. The smoothie-based format removes the complexity of traditional meal planning. Followers blend pre-set recipes from the cookbook rather than designing meals from scratch. That alone cuts decision fatigue during the 15-day program.
And it gets better. The meal plan delivers high fiber intake from whole fruits, vegetables, and seeds. High-fiber diets are associated with lower body weight and reduced risk of type 2 diabetes, heart disease, and certain cancers. The smoothie format concentrates multiple servings of produce into each meal.
Despite the smoothie-heavy structure, each meal contains protein, fiber, and healthy fats. Pasternak calls this combination the ‘Holy Trinity’ for sustained energy and satiety. The balanced macronutrient profile prevents the extreme hunger spikes common in liquid-only diets.
Key Benefits:
- Simplified meal preparation with pre-set smoothie recipes
- High fiber intake from whole fruits, vegetables, and seeds
- Balanced macronutrient profile in every meal
- Reduced decision fatigue during the 15-day program
- Progressive transition from liquid to solid meals
Can the Body Reset Diet Improve Your Nutrient Intake?
Yes. The body reset diet does increase fruit and vegetable consumption. Blending whole produce preserves fiber while delivering vitamins, minerals, and antioxidants in a concentrated format. Each smoothie packs multiple servings of produce into a single drinkable meal.
The bad news? The diet falls short of USDA MyPlate guidelines during Phase 1. Whole grain intake is insufficient in the early smoothie-only phase. Protein from non-powder sources also remains below recommended levels until solid meals enter the rotation in Phase 2 and Phase 3.
What Are the Risks of the Body Reset Diet?
The body reset diet restricts calories to potentially unsafe levels. At 1,200 to 1,400 calories per day, the plan may be too restrictive for active individuals or those with higher metabolic needs. Extreme caloric restriction over multiple days can slow metabolic rate and reduce energy availability.
Here’s what no one tells you: long-term adherence proves difficult for most participants. Reviews consistently classify the body reset diet as a fad diet. Weight regain is common once normal eating patterns resume after the 15-day program ends without continued calorie monitoring.
Phase 1 eliminates solid food entirely for five days. Why does that matter? The absence of chewing removes important satiety cues that the brain uses to register fullness. Dietitians warn that liquid-only dietary phases don’t build the sustainable eating behaviors necessary for lasting weight management.
Primary Risks:
- Calorie intake too low for active individuals (1,200-1,400 per day)
- Metabolic slowdown from extended caloric restriction
- High weight regain rate after the 15-day program ends
- Loss of satiety cues from solid food elimination in Phase 1
- Classified as a fad diet by multiple nutrition review panels
Who Should Avoid the Body Reset Diet?
People with diabetes face blood sugar risks on this plan. The high-fruit smoothie phases can cause significant blood sugar fluctuations. A rapid calorie drop from normal intake to 1,200 calories per day can trigger dangerous hypoglycemia without medical supervision.
Individuals with heart disease should approach the body reset diet with caution. Sudden calorie drops and liquid-heavy meal plans affect electrolyte balance. Changes in sodium, potassium, and magnesium levels can influence cardiac function and blood pressure stability.
Our coaches at Optimal Weight Plan always recommend consulting a doctor before starting any restrictive diet plan. Individuals on medication, pregnant women, and those with existing medical conditions need professional guidance. The body reset diet isn’t appropriate for everyone despite its mainstream popularity.
Groups That Should Consult a Doctor First:
- Individuals with type 1 or type 2 diabetes
- People with heart disease or blood pressure conditions
- Pregnant or breastfeeding women
- Individuals currently taking prescription medication
- Anyone with a history of eating disorders
What Should You Eat on the Body Reset Diet?
Each smoothie requires four essential components. A liquid base of dairy or non-dairy milk forms the foundation. A protein source (powder or plain Greek yogurt) builds the second layer. Fruits or vegetables provide fiber. Nuts, seeds, or avocado add healthy fats for sustained fullness.
Solid meals follow the ‘S-meal’ format throughout Phase 2 and Phase 3. Approved options include salads, sandwiches, soups, stir-fries, and scrambles. Each single-dish meal limits the number of components on the plate. Think of it this way: the single-format approach prevents overeating by controlling portion structure.
Two daily crunchy snacks round out each day across all three phases. Approved options include vegetables with hummus, apple slices with almond butter, and mixed nuts. Each snack provides a combination of fiber, protein, and healthy fats to bridge the gaps between main meals.
Steps to Build a Body Reset Smoothie:
- Choose a liquid base: dairy milk, almond milk, oat milk, or water
- Add a protein source: protein powder or plain non-fat Greek yogurt
- Blend in fruits or vegetables for fiber and micronutrients
- Include a healthy fat: one tablespoon of nut butter, chia seeds, or half an avocado
Which Foods Are Off Limits During the Body Reset Diet?
Fried foods, candy, and chips are completely banned for 15 days. Fatty meats, soda, highly processed grains, and restaurant meals also fall on the restricted list. The prohibition covers the entire program duration across all three phases without exceptions.
The diet emphasizes low-fat foods with specific healthy fat exceptions. Nuts, seeds, and avocado provide the only approved fat sources. Lean protein and high-fiber carbohydrates from fruits and vegetables form the core nutritional framework. All meals prioritize nutrient density over caloric volume.
Banned Foods During the Body Reset Diet:
- Fried foods and deep-fried snacks
- Candy, chocolate bars, and sugary desserts
- Chips and processed salty snacks
- Fatty meats and processed deli meats
- Soda and sugary beverages
- Highly processed grains (white bread, pastries)
- Restaurant meals and takeout food
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