Understanding The Fast 800 Approaches
Dr. Michael Mosley's Fast 800 program includes the Very Fast 800 and the Fast 800 Keto as intensive, short-term options for rapid weight loss, particularly for those who are overweight or have type 2 diabetes. Both plans operate within a calorie-restricted framework of around 800 calories per day, aiming to induce ketosis, where the body burns fat instead of carbohydrates for energy. The primary difference lies in the level of carbohydrate restriction to achieve varying intensities of ketosis.
The Very Fast 800 Explained
The Very Fast 800 involves consuming roughly 800 calories daily, following a low-carb, Mediterranean-style diet. Carbohydrate intake is typically limited to around 50 grams per day, which can lead to a mild form of ketosis. This approach can be combined with time-restricted eating.
Key features of the Very Fast 800:
- Approximately 800 calories per day from whole foods.
- Low-carb, Mediterranean diet style.
- Moderate carbohydrate restriction (up to 50g per day).
- Promotes mild, or intermittent, ketosis.
- Can incorporate time-restricted eating.
The Fast 800 Keto Explained
The Fast 800 Keto is a more restrictive version designed for deeper, more consistent ketosis. It involves a very low carbohydrate intake, often targeting 20-30 grams daily (under 50g is typical), combined with higher protein and healthy fats. Calorie intake may be slightly higher, 800-1000 calories, to accommodate the macronutrient distribution. This can help curb hunger for some individuals.
Key features of the Fast 800 Keto:
- 800-1000 calories per day.
- Very low-carb, high-protein, Mediterranean-style diet.
- Intense carbohydrate restriction (typically under 50g per day).
- Aims for consistent and deeper ketosis.
- Generally more challenging to adhere to.
The Role of Ketosis in Both Diets
Both diets induce ketosis through calorie and carbohydrate reduction. Very Fast 800 leads to milder ketosis, while Fast 800 Keto's stricter carbohydrate limit promotes a more consistent and deeper state, potentially accelerating fat burning.
Comparison Table: Very Fast 800 vs. Fast 800 Keto
| Feature | Very Fast 800 | Fast 800 Keto |
|---|---|---|
| Calorie Intake | Approximately 800 calories per day. | Approximately 800–1000 calories per day. |
| Carbohydrate Limit | Moderately low-carb (up to 50g daily). | Very low-carb (typically under 50g daily). |
| Dietary Focus | Low-carb, Mediterranean-style diet with balanced macros. | Very low-carb, high-protein, Mediterranean-style diet. |
| Level of Ketosis | Induces mild, possibly intermittent, ketosis. | Aims for consistent and deeper nutritional ketosis. |
| Difficulty | Less restrictive and generally easier to follow. | More restrictive, potentially more challenging to adhere to. |
| Ideal For | Individuals starting intense dieting, or those seeking quicker results within a flexible low-carb framework. | Motivated individuals seeking the most accelerated results and consistent ketosis. |
| Duration | Up to 12 weeks, or until a healthy BMI is reached. | Up to 12 weeks, or until a healthy BMI is reached. |
Making the Right Choice for Your Goals
Choosing between the two depends on your commitment and weight loss goals. Very Fast 800 is less restrictive and a good starting point, still offering rapid weight loss. Fast 800 Keto is for those highly motivated for accelerated results through consistent ketosis. It can be more effective for hunger control for some, but is stricter. Both require medical consultation, especially with existing health conditions.
Conclusion
The key difference between Very Fast 800 and Fast 800 Keto is the degree of carbohydrate restriction, impacting the intensity of ketosis. Very Fast 800 is a rapid, moderately low-carb plan, while Fast 800 Keto is a very low-carb approach for deeper ketosis. Both are temporary, rapid weight loss phases leading to more sustainable plans like The New 5:2 or The Way of Life.
Optional Resources
For more detailed information on meal plans, recipes, and program specifics, consider exploring the official resource page for The Fast 800 programme: The Fast 800 official website.
