
The Fast Tract Diet™ is a science-based approach to help individuals identify and reduce foods that contribute to digestive symptoms. It is rooted in food chemistry, microbiology, and human physiology, offering a structured system for making informed dietary choices that support digestive health and long-term symptom relief. The diet distinguishes between easily digestible, gut-friendly foods and those likely to cause excess fermentation, which contributes to symptoms like gas, bloating, abdominal pain, and reflux. The Fasting Mimicking Diet (FMD) is another dietary approach that replicates the benefits of intermittent fasting without total food abstinence. It focuses on a macronutrient ratio of approximately 10% protein, 45% fat, and 45% carbohydrates, with individuals consuming around 40%-50% of their usual calories on the first day and 10%-20% on the next few days. Both diets aim to improve digestive health and offer flexibility in food choices, with the Fast Tract Diet™ providing a mobile app to help users track meals, symptoms, and symptom potential for specific foods and drinks.
| Characteristics | Values |
|---|---|
| Goal | Help individuals identify and reduce foods that contribute to digestive symptoms |
| Science | Rooted in food chemistry, microbiology, and human physiology |
| Food Choices | Distinguishes between easily digestible, gut-friendly foods and those that cause excess fermentation |
| Fermentation Potential (FP) | A metric that estimates how likely a food is to ferment in the gut and trigger symptoms |
| Diet Cycle | Set up in cycles, e.g., five consecutive days per month over three months |
| Calorie Intake | Limited calorie intake, generally 40%-50% on the first day, then 10%-20% for the next four days |
| Macronutrient Ratio | Approximately 10% protein, 45% fat, and 45% carbohydrates |
| Food Options | Non-starchy vegetables, whole fruits, healthy fats like avocados, walnuts, and olive oil |
| Benefits | Weight loss, decreased belly and liver fat, reduced cholesterol and blood sugar levels, lowered blood pressure |
| Tools | Fast Tract Diet App, books like "The Fast Track Detox Diet" by Ann Louise Gittleman |
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What You'll Learn
- The Fast Tract Diet™ is a science-based approach to help individuals identify and reduce foods that contribute to digestive symptoms
- The diet distinguishes between gut-friendly foods and those that cause excess fermentation in the intestine
- The Fast Tract Diet App helps identify gut-friendly foods and track meals and symptoms
- The Fasting Mimicking Diet (FMD) is a dietary approach designed to replicate the benefits of intermittent fasting without total food abstinence
- The FMD focuses on a macronutrient ratio of approximately 10% protein, 45% fat, and 45% carbohydrates

The Fast Tract Diet™ is a science-based approach to help individuals identify and reduce foods that contribute to digestive symptoms
The Fast Tract Diet™ is a science-based approach to dietary intervention for managing digestive disorders. It is rooted in food chemistry, microbiology, and human physiology, offering a structured system for improving digestive health and reducing symptoms. The diet categorises foods into two groups: easily digestible, gut-friendly foods and those that can cause excess fermentation in the intestines, leading to symptoms like gas, bloating, abdominal pain, diarrhoea, and reflux. This fermentation process is linked to conditions such as Irritable Bowel Syndrome (IBS) and Small Intestinal Bacterial Overgrowth (SIBO).
At the core of the Fast Tract Diet is the Fermentation Potential (FP) system, a scientifically derived metric that predicts a food's tendency to ferment in the gut and trigger symptoms. Each food is assigned an FP value, with lower values indicating lower symptom potential. The FP system empowers individuals to make informed dietary choices while maintaining variety and enjoyment. The diet was introduced as a drug- and antibiotic-free strategy for managing SIBO and other digestive issues, aiming for long-term symptom relief.
The Fast Tract Diet App is a useful tool for implementing the diet. It helps users identify gut-friendly foods, track meals and symptoms, create shopping lists, and quickly look up symptom potential for specific foods. The app's FP food list contains over 1100 items with corresponding FP values, which is particularly critical for managing conditions like GERD, IBS, and SIBO. The app also allows users to create custom recipes and adjust portion sizes for certain foods to manage their symptoms.
To get started with the Fast Tract Diet, individuals can refer to the Fast Tract Digestion book series to understand the science behind the diet and how it differs from other approaches. The books also offer natural alternatives to sugar, such as stevia. Additionally, the app can be downloaded on Google Play or iTunes to start tracking FP intake and symptom progress. The diet is flexible and can be tailored to various dietary preferences and health conditions, ensuring a personalised approach to digestive health.
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The diet distinguishes between gut-friendly foods and those that cause excess fermentation in the intestine
The Fast Tract Diet™ is a science-based, practical approach to improving digestive health and reducing the recurrence of symptoms over the long term. The diet distinguishes between gut-friendly foods and those that cause excess fermentation in the intestine.
The diet is rooted in food chemistry, microbiology, and human physiology. It offers a structured system for making informed dietary choices that support digestive health. The core of the Fast Tract Diet is the innovative Fermentation Potential (FP) system, which estimates how likely a food is to ferment in the gut and trigger symptoms. This flexible system allows individuals to tailor their food choices while maintaining dietary variety and enjoyment.
Fermentation occurs when gut bacteria feed on fibre in the large intestine. This process produces gases such as methane, hydrogen, hydrogen sulphide, and carbon dioxide. While these gases may serve useful purposes, excess production can lead to gastrointestinal problems like bloating and pain.
To support a healthy gut, it is important to include both prebiotics and probiotics in your diet. Prebiotics are found in fruits, vegetables, nuts, seeds, and whole grains, while probiotics, or good bacteria, can be obtained from fermented foods like yoghurt, kombucha, sauerkraut, kimchi, and miso. Additionally, a high-fibre diet can aid in digestion by softening and adding bulk to stools, making them pass more quickly through the intestines.
However, it is important to introduce these foods gradually, as adding too much fibre and fermented food at once can cause unwanted gas and bloating. It is also recommended to limit processed foods, added sugars, salt, artificial sweeteners, and alcohol to maintain a healthy gut.
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The Fast Tract Diet App helps identify gut-friendly foods and track meals and symptoms
The Fast Tract Diet is a science-based, practical approach designed to help individuals identify and reduce foods that contribute to digestive symptoms. The diet distinguishes between easily digestible, gut-friendly foods and those more likely to cause excess fermentation in the gut, which can lead to symptoms like gas, bloating, abdominal pain, diarrhoea, constipation, pressure, and reflux.
The Fast Tract Diet App is a useful tool for those following the diet. It helps users identify gut-friendly foods and track meals and symptoms. The app is based on a flexible "FP" point system, with each food assigned a specific point value based on its serving size and symptom potential. Lower FP points indicate lower symptom potential. The app also allows users to create shopping lists and quickly look up the symptom potential for specific foods and drinks.
The app features a dashboard where users can log meals and symptoms, as well as a tracker that automatically calculates FP values per serving. Users can also create custom foods in the app by entering nutritional facts, and the app will calculate the FP value for future reference.
The Fast Tract Diet App has received some criticism for being glitchy and unresponsive, with users reporting issues with entering meals and symptoms. However, it has also received positive reviews, with some users reporting that it helped them identify their trigger foods and improve their symptoms.
Overall, the Fast Tract Diet App can be a helpful tool for those following the Fast Tract Diet, providing a convenient way to track meals, symptoms, and progress over time.
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The Fasting Mimicking Diet (FMD) is a dietary approach designed to replicate the benefits of intermittent fasting without total food abstinence
The FMD is primarily plant-based and designed to produce fasting-like effects in the body by targeting blood glucose, ketone levels, and other biological markers. It involves significantly reducing calorie intake for a specific period, typically ranging from 3 to 7 days, and is often repeated cyclically, such as 5 consecutive days per month over 3 months. On the first day, individuals consume around 40%-50% of their usual calorie intake, then reduce to 10%-20% for the next four days. The FMD focuses on a macronutrient ratio of approximately 10% protein, 45% fat, and 45% carbohydrates.
The FMD primarily includes non-starchy vegetables such as celery, zucchini, tomatoes, and leafy greens, along with whole fruits including berries, apples, and oranges. Healthy fat sources such as avocados, walnuts, and olive oil are also allowed, providing essential fats while limiting protein and carbohydrate intake.
The FMD is not designed to be a long-term diet plan. It is meant to be performed anywhere from once a month for obese patients looking to lose weight for health reasons or those looking to manage chronic health conditions, and 2-3 times per year for health-conscious individuals looking to reap the potential longevity benefits. It is important to consult a medical practitioner to determine if the FMD is suitable for you and to prioritize an individualized approach.
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The FMD focuses on a macronutrient ratio of approximately 10% protein, 45% fat, and 45% carbohydrates
The Fasting Mimicking Diet (FMD) is a dietary approach designed to replicate the benefits of intermittent fasting without the total food abstinence associated with traditional fasting. It is primarily plant-based and focuses on a macronutrient ratio of approximately 10% protein, 45% fat, and 45% carbohydrates. This means that protein intake is limited, and individuals are advised to consume non-starchy vegetables such as celery, zucchini, tomatoes, and leafy greens. Whole fruits, including berries, apples, and oranges, are also recommended.
Healthy fats, such as avocados, walnuts, and olive oil, are included in the FMD to provide essential fats while adhering to the prescribed macronutrient ratio. This diet is often structured in cycles, such as five consecutive days per month over three months. During this time, individuals typically consume around 40%-50% of their usual calorie intake on the first day, followed by a reduction to 10%-20% for the remaining four days.
It is important to note that the FMD is not suitable for everyone. It is recommended that individuals consult with a healthcare provider before starting the diet to ensure it aligns with their overall health and caloric needs, which can vary based on age, weight, and health status. Additionally, the FMD may not be appropriate for those who are pregnant or breastfeeding, have a history of eating disorders, or have specific medical conditions.
The FMD has shown promising results in weight management, metabolic health, and chronic disease risk reduction. Benefits documented by Dr. Yaceczko include weight loss, decreased belly and liver fat, reduced cholesterol and blood sugar levels, and lowered blood pressure. The diet may also help reduce inflammation and cell damage associated with aging and disease.
While the FMD offers potential health benefits, it is a relatively new dietary pattern, and more research is needed to validate its safety and effectiveness for different individuals. As with any dietary intervention, an individualized approach is essential, and clinical trials are required to determine the full effects of the FMD on human health.
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Frequently asked questions
The Fast Track Diet is an approach to improve digestive health and reduce symptoms of digestive disorders such as IBS and SIBO. It involves identifying and reducing foods that are hard to digest and contribute to symptoms like gas, bloating, and abdominal pain.
The FMD is a version of the Fast Track Diet that involves eating patterns designed to replicate the benefits of intermittent fasting without complete food abstinence. It includes non-starchy vegetables, whole fruits, and healthy fats, with a focus on a specific macronutrient ratio.
It is recommended to consult a healthcare provider before starting the Fast Track Diet. The diet can be tailored to individual needs and preferences, with the help of resources such as the Fast Tract Diet app and books, which provide information on gut-friendly foods and the Fermentation Potential (FP) system.






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