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How much does the Fast 800 diet cost?

4 min read

According to the official Fast 800 website, the 12-week online programme costs approximately $39.99 USD per month for three months when purchased through their website. This membership fee is one of several cost factors that determine how much the Fast 800 diet costs, with additional expenses for food, optional books, and supplements also influencing the total investment in your health.

Quick Summary

The total financial outlay for the Fast 800 diet depends on whether you opt for the official online program or a self-guided approach, plus variable grocery and supplementary item costs. Weighing the value of structured support against personal spending reveals the most affordable path to follow the diet's principles.

Key Points

  • Online Programme Cost: The 12-week guided programme costs about $39.99 USD/month for three months, transitioning to a cheaper monthly graduate membership.

  • Food Costs: Grocery expenses vary but can be managed by focusing on budget-friendly, whole-food ingredients characteristic of a Mediterranean diet.

  • Self-Guided Option: Books by Dr. Michael Mosley provide a more affordable, one-time purchase option for following the diet, costing between $25 and $55.

  • Optional Supplements: Branded shakes and multivitamins are optional, adding to the overall cost, but are not essential for success.

  • Accessing Support: The online programme offers dedicated support from health coaches and a community, which is not available with the self-guided method.

  • Cost-Saving Measures: Cooking at home, meal planning, and utilizing free resources can help keep expenses down while adhering to the diet's principles.

In This Article

Breaking Down the Fast 800 Diet Costs

Determining exactly how much the Fast 800 diet costs can be complex because there are several different pathways to follow the plan, each with its own price tag. The most significant variable is whether you choose the official, guided online programme or opt for a self-guided route using books and free resources. Other variables include your personal grocery habits and the optional purchase of branded supplements like shakes.

The Official Online Programme

The most comprehensive way to follow the Fast 800 is by enrolling in the official online programme, which provides structured meal plans, recipes, exercise videos, and community support. The cost structure is typically split into a main 12-week plan followed by a cheaper, ongoing support membership.

  • Initial 12-Week Programme: As of late 2024 and early 2025, the cost for the 12-week program via the website is often split into three monthly payments. For example, a US customer would pay $39.99 USD per month for three months, for a total of approximately $120. This includes a 7-day free trial period before payment begins.
  • Graduate Support Membership: After completing the initial 12 weeks, members transition to a less expensive monthly membership, for example, around $15 USD per month. This option is designed for those in the maintenance phase of the diet.
  • App Store Variations: It is worth noting that pricing can vary slightly when signing up via the Google Play or Apple App Store compared to the website, sometimes offering different subscription lengths, such as annual plans.

Food and Grocery Expenses

The Fast 800 diet advocates for a moderately low-carb, Mediterranean-style eating pattern, focusing on whole foods rich in protein, fibre, and healthy fats. The cost of groceries will depend on many factors, including where you live, the quality of ingredients you choose, and your current eating habits.

  • Initial Phase: During the restrictive 800-calorie phase, grocery costs might initially decrease because you are consuming less food overall. However, focusing on high-quality ingredients like lean protein, oily fish, nuts, seeds, and fresh vegetables could counteract some savings.
  • Maintenance Phase: In the less restrictive phases, food costs may return to a more normal level, depending on your choices. The official programme provides optimized meal plans to help use ingredients across multiple meals, which can help reduce waste and overall spend.
  • Cost-Saving Tips: Shopping for seasonal vegetables, buying in bulk, and preparing meals at home from scratch can significantly lower your weekly grocery bill. You can also save money by opting for cheaper sources of protein like eggs and legumes instead of more expensive cuts of meat.

Comparison: Online Programme vs. Self-Guided Approach

Feature Official Online Programme Self-Guided (using books)
Cost 12-week program (~$120 USD), then monthly membership (~$15 USD). One-time book purchase (e.g., $25-$55 USD per book).
Free Trial 7-day free trial available. No trial, immediate book purchase required.
Resources Over 900 recipes, 250+ workouts, educational articles, behaviour change courses, and more. Primarily recipes and basic diet principles found in the book.
Support Exclusive community access, forums, and direct access to health coaches. No dedicated support system outside of the information provided in the book.
Flexibility Multiple approaches are supported, including 'Very Fast 800', 'New 5:2', and 'Way of Life'. Follows the guidelines as described in the purchased book, less personalized.
Additional Costs Groceries for meals, optional shakes and supplements. Groceries for meals, optional shakes and supplements.

Optional Shakes and Supplements

The Fast 800 brand offers its own range of products, including meal replacement shakes, protein bars, and multivitamins, which represent an optional, but potentially significant, additional cost.

  • Fast 800 Shakes: These are designed for convenience, especially on 800-calorie fasting days. They are not required, as real food is always the preferred option, but they can be a useful, albeit expensive, crutch for some. A bag of shakes might cost around £22.99 GBP.
  • Fast 800 Multivitamins: A specially formulated multivitamin is available to ensure nutrient needs are met during weight loss, adding another potential expense.

Making the Fast 800 Diet More Affordable

Even with the costs involved, it is possible to follow the diet on a budget by making smart choices:

  • Leverage Free Resources: The principles of the Fast 800 are well-documented in Dr. Michael Mosley's books and other online summaries. You can find free recipes and exercise ideas on various health websites.
  • Embrace Home Cooking: The Mediterranean diet principles are budget-friendly when based on whole foods. Cook meals from scratch using inexpensive ingredients like pulses, grains, eggs, and seasonal vegetables.
  • Skip the Supplements: Meal replacement shakes and supplements are not mandatory. You can achieve excellent results simply by sticking to the core dietary principles with whole foods.
  • Utilize the Library: Instead of buying multiple recipe books, check your local library for copies. Many of Dr. Mosley's titles are widely available and can provide all the information you need without a purchase.

Conclusion

The question of how much the Fast 800 diet costs has no single answer, as the total varies based on your chosen path. The structured online programme offers significant support for a recurring fee, while a self-guided approach using books or free online information is a much cheaper, one-time expense. The most variable cost comes from food, which can be managed effectively with careful planning and home cooking. Ultimately, the Fast 800 diet can be as expensive or as budget-friendly as you make it, with the key principles of intermittent fasting and a Mediterranean-style diet remaining accessible regardless of your financial commitment. For an official overview, see the Fast 800 website.


Frequently Asked Questions

The official online programme costs approximately $39.99 USD per month for the first three months, completing the 12-week program. Afterward, a reduced monthly fee of around $15 USD applies for continued graduate support.

Yes, you can follow the diet by purchasing one of the Fast 800 books, which detail the diet's principles and provide recipes, though you will not get access to the interactive online community or guided videos.

Yes, you must budget for food, as the program primarily uses a Mediterranean-style diet based on whole foods. The cost of your weekly groceries is a variable expense based on your shopping habits and location.

Yes, the books are a one-time purchase, making them a more budget-friendly option than the recurring monthly fees of the online programme. However, the books offer less comprehensive support and fewer resources.

No, branded shakes are entirely optional and are not a mandatory part of the diet plan. The program emphasizes getting nutrients from real, whole foods whenever possible.

The online programme includes a 7-day free trial, access to a wide library of recipes, meal plans, exercise videos, educational articles, and a supportive community with health coaches.

You can reduce costs by following a self-guided approach with books, cooking meals from scratch with seasonal ingredients, skipping branded supplements, and using free online resources for recipes.

References

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Medical Disclaimer

This content is for informational purposes only and should not replace professional medical advice.