30-Day Chicken, Potatoes, Broccoli, and Carrots Diet Experiment: Fat Loss and Eating Habit Reset Results

Summary:

This video details a 30-day diet experiment, the CPB Diet (Chicken, Potatoes, Broccoli, Carrots), designed for fat loss without calorie tracking by resetting eating habits.

The four main foods of the CPB diet: chicken, potatoes, broccoli, and carrots [ 00:00:00 ]

Two subjects, Max (19% body fat) and Isabel (31% body fat), underwent the diet. Max struggled with overeating, Isabel with calorie tracking.

Initial 'Day 1' full body comparison of participants Max and Isabel before starting the CPB diet [ 00:00:50 ]
The diet involved unlimited CPB, 1 tbsp olive oil per meal, and no liquid calories or artificial sweeteners, aiming for blandness to reduce food pleasure.

A graphic displaying the three simple rules of the CPB diet: unlimited core foods, limited olive oil, and no liquid calories [ 00:02:40 ]
Scientifically, potatoes rank highest in satiety, and repetitive meals reduce the brain's food reward system, leading to natural calorie reduction.

A bar chart illustrating the satiety index of various foods, clearly showing potatoes as the most filling food [ 00:06:29 ]
Both subjects experienced initial cravings but no hunger, unexpectedly consuming around 1800 (Max) and 1300 (Isabel) calories daily.

Max's transformation from Day 1 to Day 15, showing a 6 lb body weight loss and a 6 cm reduction in waist circumference [ 00:12:28 ]

Isabel's transformation from Day 1 to Day 15, showing a 1.7 lb body weight loss and a 2.5 cm reduction in waist circumference [ 00:13:08 ]
Isabel incorporated flexibility (eggs, fruits, veggies, weekly treat meal) due to diet fatigue and menstrual cycle impact. Max remained strict but required micronutrient supplementation.
Final DEXA scan results: Isabel lost 5 lbs fat (31% to 28% body fat) and gained 0.5 lbs muscle. Max lost an impressive 14 lbs fat (19.3% to 12.9% body fat) while maintaining muscle.

Isabel's Day 1 (31% body fat) vs. Day 30 transformation, showing a loss of 5 lbs of fat [ 00:19:07 ]

Max's body fat percentage transformation from 19.3% on Day 1 to 12.9% on Day 30, showing significant fat loss [ 00:20:17 ]
The experiment highlighted that key principles like high protein, filling carbs, ample vegetables, mindful fats, and simple, repetitive meals are effective for fat loss.

A graphic summarizing 6 simple tips for sustainable fat loss, derived from the CPB diet principles [ 00:21:27 ]

Introduction to the Simplest Fat Loss Diet (CPB Diet) [0:00]

Purpose of the Experiment [0:00]
- To test a scientifically designed, simple fat loss diet (CPB Diet) over 30 days.
  
  The four main foods of the CPB diet: chicken, potatoes, broccoli, and carrots [ 00:00:00 ]
- Aimed at achieving fat loss without calorie tracking.
  
  Animated graphic highlights the diet's goals: maximizing fullness and calorie burn through specific food choices [ 00:00:13 ]
- Designed to psychologically reset the brain to eliminate hunger, cravings, and unhealthy food habits.
  
  The CPB diet meal is presented as an alternative to methods like calorie counting, keto, or fasting [ 00:00:20 ]
Meet the Participants [0:27]
- Max: A personal trainer and train conductor.
  - Started at 19% body fat (DEXA scan).
    
    Max, a personal trainer and train conductor, shown in the gym [ 00:00:30 ]
    
    Max's starting body fat percentage is displayed as 19% [ 00:00:35 ]
  - Struggled with overeating, frequently visiting buffets and eating until sick, negatively affecting his sleep.
    
    A plate of sushi, representing Max's pre-diet habit of frequently visiting buffets [ 00:01:20 ]
    
    Meat grilling at a restaurant, an example of the buffet-style eating Max enjoyed [ 00:01:22 ]
    
    A hot pot meal, another example of Max's frequent buffet visits [ 00:01:24 ]
    
    Max showcasing a massive plate of lobster at a buffet, illustrating his past habit of overeating until sick [ 00:01:31 ]
- Isabel: A Lagree coach.
  - Started at 31% body fat (DEXA scan).
    
    Isabel, a Lagree coach, demonstrates her active profession [ 00:00:41 ]
    
    Isabel's starting body fat percentage is displayed as 31% [ 00:00:45 ]
    
    A bar chart illustrating the female body fat distribution in the US, providing context for Isabel's starting body fat [ 00:00:47 ]
  - Struggled with the effort and time required for calorie tracking due to a busy schedule.
    
    An individual weighing oats, demonstrating the calorie tracking Isabel found challenging due to her busy schedule [ 00:01:04 ]
- Initial body composition of both participants.
  
  Comprehensive 'Day 1' body shots of Max and Isabel from multiple angles, showcasing their starting physiques [ 00:00:50 ]
The CPB Diet Rules [2:34]
- 1. Unlimited Chicken Breast, Potatoes, Broccoli, and Carrots: Participants could eat as much of these four foods as they wanted.
- 2. Limited Olive Oil: One tablespoon allowed per meal.
- 3. No Liquid Calories, Diet Sodas, or Artificial Sweeteners: Focus on whole, unprocessed foods.
  
  A graphic displaying the three simple rules of the CPB diet: unlimited core foods, limited olive oil, and no liquid calories [ 00:02:40 ]
- Underlying Principle: Keep the diet bland and repetitive to reduce the "food reward system" activation and naturally decrease overall intake.
  
  Max with a plate of sushi and Isabel with croissants, representing the 'treat' foods they would forgo during the diet [ 00:02:02 ]
  
  Meal preparation of potatoes, with the text 'NO CALORIE TRACKING' overlaid, highlighting a key aspect of the CPB diet [ 00:00:04 ]
  
  An illustration depicting the brain's food reward system being suppressed by eliminating highly palatable foods like sushi, fried chicken, and donuts [ 00:03:42 ]

Week 1: Challenges and Scientific Rationale [3:55]

Initial Struggles and Mental Impact [3:55]
- Max experienced strong cravings, with images of preferred foods like sushi constantly "popping up," describing it as "mentally exhausting."
  
  Max describes struggling with constant mental images of potatoes due to the diet's restrictive nature [ 00:05:58 ]
- Isabel found the diet "very trapped," especially eating chicken for breakfast, and felt a loss of appetite due to the lack of variety.
  
  Isabel's meal prep on Day 1, showing shredded chicken, carrots, and mashed potatoes in containers [ 00:03:59 ]
Unexpected Outcome: No Hunger and Estimated Calorie Intake [8:05]
- Despite initial difficulties, neither participant complained about hunger; they actually struggled to eat enough.
- Based on weight trends, estimated daily calorie intake without tracking:
  - Max: Approximately 1800 calories/day.
    
    Max's estimated daily calorie intake of 1847 kcal, as calculated by the app based on his weight trends [ 00:07:56 ]
    
    Max holding a plate of his CPB meal, with an overlay indicating his estimated consumption of '1800 calories per day' [ 00:08:01 ]
  - Isabel: Approximately 1300 calories/day.
    
    Isabel holding a plate of her CPB meal, with an overlay indicating her estimated consumption of '1300 calories per day' [ 00:08:04 ]
Early Physical Results [8:49]
- After just one week, both participants showed visible body tightening.
  
  A ghosted overlay comparison showing visible body tightening for both Max and Isabel from Day 1 to Day 7 [ 00:08:52 ]
- Measurements revealed significant changes:
  - Max: Waist down over 3 centimeters and 5 lbs body weight loss.
    
    Max's Week 1 results showing a 5 lb body weight loss and a 3 cm reduction in waist circumference [ 00:09:03 ]
  - Isabel: Waist down 1.5 centimeters.
Scientific Principles Behind the Diet's Effectiveness [5:41]
- Potatoes for Satiety:
  - A 1995 study comparing 38 foods for fullness ranked potatoes highest.
    
    An image of the scientific paper 'A satiety index of common foods' used to justify the choice of potatoes for the diet [ 00:06:09 ]
    
    White bread assigned a 'Fullness Score' of 100, serving as the baseline for the satiety index study [ 00:06:25 ]
    
    A bar chart illustrating the satiety index of various foods, clearly showing potatoes as the most filling food [ 00:06:29 ]
  - Preparation is crucial: Frying potatoes significantly reduces their satiety advantage, justifying the one-tablespoon olive oil limit.
    
    French fries shown with a low fullness score [<a href="https://youtube.com/watch?v=dPvuB0aJnNU&t=116">116</a>], emphasizing how cooking method impacts the satiety of potatoes [ 00:06:44 ]
- Fiber-Rich Vegetables and Lean Protein:
  - Broccoli, carrots, and chicken breast add volume and fullness with very few calories.
  - These foods require more time and energy to digest, leading to a higher thermic effect of food (more calories burned in processing).
    
    A diagram comparing two stomachs, illustrating how a meal of fiber-rich vegetables and lean protein creates more volume and fullness than calorie-dense processed foods [ 00:06:59 ]
- Food Reward System Reset and Repetitive Meals:
  - The human brain's reward system is triggered by novel tastes and variety, leading to overeating (e.g., at buffets).
    
    A dessert buffet spread, symbolizing the variety of new tastes that trigger the brain's reward system and lead to overeating [ 00:04:56 ]
  - Keeping meals simple and repetitive reduces this reward system activation.
    
    The speaker presenting a plate of the simple, repetitive CPB lunch, emphasizing the diet's strategy to reduce overeating [ 00:05:11 ]
  - Studies show people naturally eat 20-30% fewer calories and lose more fat by adhering to simple, consistent meals, with this effect strengthening over time.
    
    A graphic demonstrating how repetitive meals, like mac and cheese eaten daily, lead to a natural reduction in calorie intake over time as the food becomes less exciting [ 00:05:26 ]

Week 2-3: Adaptations and Continued Progress [9:57]

Increased Flexibility for Isabel [9:57]
- To combat "chicken for breakfast" fatigue and improve micronutrient intake, Isabel was allowed to add:
  - One additional protein source: She chose eggs over Greek yogurt or protein powder.
    
    Isabel's new protein options include eggs, Greek yogurt, and protein powder to add flexibility to her diet [ 00:10:09 ]
    
    Isabel's updated meal plan on Day 9, featuring scrambled eggs along with potatoes, broccoli, and carrots [ 00:10:38 ]
  - Additional micronutrient-rich foods: Orange, tomato, avocado, Greek yogurt, and bok choy.
    
    Isabel's additional food options: orange, tomato, avocado, Greek yogurt, and bok choy, chosen for micronutrients and variety [ 00:13:28 ]
    
    Bok choy highlighted as a low-calorie addition (9 calories/cup) to Isabel's diet, providing micronutrients [ 00:13:47 ]
  - Planned Hedonic Deviation: One treat meal per week (e.g., sushi) to maintain social life and provide a mental boost, supported by research for better long-term results.
    
    The speaker enjoying a burger during a planned 'treat meal' (hedonic deviation), demonstrating an allowed break from the strict diet [ 00:14:05 ]
    
    A rich meal of steak, lobster, and fries, representing a planned hedonic deviation, or treat meal [ 00:14:19 ]
- Isabel's Response to treat meal: Surprisingly, the treat meal did not spike cravings, and she found it easy to return to the routine.
  
  Isabel enjoying her sushi treat meal on Day 15, showing how she incorporated flexibility [ 00:14:33 ]
Max's Strict Adherence and Micronutrient Needs [15:15]
- Max chose to remain strict on the original CPB diet, declining additional food options, aiming for maximum results.
- Micronutrient Deficiency: Analysis of his strict diet revealed deficiencies in Magnesium, Omega 3, Vitamin D3, and Zinc, prompting the recommendation of supplements.
  
  The speaker presenting Max with bottles of supplements, advising him to address potential micronutrient deficiencies from his strict diet [ 00:16:03 ]
  
  Bottles of Magnesium, Omega 3, Vitamin D3, and Zinc supplements, identified as essential for Max's strict diet [ 00:16:08 ]
Managing Isabel's Menstrual Cycle [16:20]
- Challenge: Isabel experienced increased hunger and cravings during her menstrual cycle, common for women.
  
  Isabel's diversified meal featuring chicken, potatoes, carrots, broccoli, and tomato, reflecting her increased flexibility [ 00:16:16 ]
- Strategy: Instead of major dietary changes, she made small adjustments like increasing meal volume with more potatoes and managing cravings with simple comforts like tea or gum, without breaking the overall plan.
  
  Isabel holding a plate with a larger portion of food on Day 20, reflecting her adjustment to increase meal volume during her menstrual cycle [ 00:16:50 ]
  
  Isabel drinking tea on Day 20, demonstrating her method of managing cravings with simple comforts during her menstrual cycle [ 00:16:54 ]
Overcoming FOMO and Building New Habits for Max [10:48]
- Max reported "FOMO" (Fear Of Missing Out) from social events and family lunches involving food.
  
  Isabel at a restaurant with friends, eating only broccoli, highlighting the social 'FOMO' experienced during the diet [ 00:10:45 ]
- He consciously replaced eating-centric activities with alternative pastimes like drinking tea, reading books, and planning social activities that don't revolve around food.
  
  Max drinking tea on Day 12, demonstrating his new habit of replacing eating with other activities like drinking tea [ 00:11:33 ]
  
  Max reading a book on Day 12, showcasing how he replaced food-centric activities with reading [ 00:11:34 ]
  
  Max engaging in a game of pickleball with friends on Day 12, representing his new social activities not centered around food [ 00:11:39 ]
- This strategy helped him eliminate bad habits and establish new, positive ones.
- Decision Fatigue Reduction: Repeating the same simple meals significantly reduces daily food-related decisions, freeing up mental energy and willpower for other tasks, such as work and intense workouts.
- Importance of Workouts: Consistent training with a solid program (using the app) was crucial to preserve muscle mass during rapid weight loss, preventing muscle loss and ensuring fat loss.
  
  Max performing a dumbbell press, with an overlay of the Built with Science Plus app providing exercise guidance [ 00:12:20 ]
  
  Isabel performing a cable lateral raise, with an overlay of the Built with Science Plus app providing exercise guidance [ 00:12:23 ]
  
  Max's transformation from Day 1 to Day 15, showing a 6 lb body weight loss and a 6 cm reduction in waist circumference [ 00:12:28 ]
  
  Isabel's transformation from Day 1 to Day 15, showing a 1.7 lb body weight loss and a 2.5 cm reduction in waist circumference [ 00:13:08 ]

Final Results and Long-Term Application [18:00]

Pre-Scan Sentiments [18:18]
- Isabel felt bloated and "puffy" at the end of her cycle, making it hard to see significant visual progress.
- Max felt he was getting "smaller" and was worried about potential muscle loss, expressing uncertainty about his progress.
  
  Max lying on a gym mat on Day 20, expressing mental fatigue from the strict diet [ 00:17:09 ]
Isabel's DEXA Scan Results (Day 30) [19:00]
- Fat Loss: Lost 5 lbs of fat.
  
  Isabel's Day 1 (31% body fat) vs. Day 30 transformation, showing a loss of 5 lbs of fat [ 00:19:07 ]
- Body Fat Percentage: Decreased from 31% to 28% (a 3% drop), which is a significant change typically seen over a longer period.
- Lean Mass: Gained 0.5 lbs of lean mass, indicating successful muscle retention and even slight growth during fat loss.
  
  Isabel gained 0.5 lbs of lean mass, indicating muscle retention and growth during her fat loss journey [ 00:19:19 ]
Max's DEXA Scan Results (Day 30) [19:44]
- Fat Loss: Lost an impressive 14 lbs of fat.
  
  Max's Day 1 vs. Day 30 transformation, showcasing an impressive loss of 14 lbs of fat [ 00:19:47 ]
- Body Fat Percentage: Decreased from 19.3% to 12.9% (a 6.4% drop) in 30 days, an "insane" and unexpected result.
  
  Max's body fat percentage transformation from 19.3% on Day 1 to 12.9% on Day 30, showing significant fat loss [ 00:20:17 ]
- Muscle Mass: Maintained muscle mass, addressing his biggest concern about muscle loss during rapid weight reduction.
  
  Max reacting positively to the news that he maintained his muscle mass during the rapid fat loss [ 00:20:07 ]
  
  Max's back view, confirming that his muscle mass remained consistent throughout the diet challenge [ 00:20:09 ]
Post-Diet Behavior and Mindset Shift [20:44]
- Max, instead of gorging on buffets alone, used his prize to treat friends and family, making up for missed social moments during the challenge and demonstrating a positive shift in his relationship with food.
  
  Max sharing his buffet prize with friends and family, demonstrating a positive shift in his eating habits [ 00:20:52 ]
  
  Max enjoying a buffet with friends and family, showing his evolved relationship with food after the diet [ 00:20:56 ]
- Both subjects expressed pride in their achievements and noted improved sleep quality and mental clarity.
Key Takeaways for Sustainable Fat Loss (6 Simple Tips) [21:28]
- Even without strictly following the CPB diet, applying some of its core principles can lead to significant results:
  
  A graphic summarizing 6 simple tips for fat loss: protein, filling carbs, half plate veggies, mindful fats, simple meals, and don't change meals daily [ 00:21:27 ]
  1. Protein at Every Meal: Ensures satiety and muscle preservation.
  2. Choose Filling Carbs: Prioritize options like potatoes and fruit over less satiating choices like rice or bread.
  3. Half Your Plate with Vegetables: Increases volume and nutrient density with low calories.
  4. Be Mindful with Fats: Oils, nuts, and avocados are calorie-dense and add up quickly.
  5. Keep Most Meals Simple and Repetitive: Reduces decision fatigue and food reward system activation.
  6. Don't Change Meals Daily: Promotes consistency and prevents overeating due to novelty.