The Very Fast 800

An 800-calorie diet for rapid weight loss. Supports those looking to kickstart significant weight loss and reset their metabolism.

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Rapid weight loss phase

Who is it for?
  • Those seeking fast weight loss
  • People aiming to lower blood sugar
  • Those working to reverse type 2 diabetes
How does it work?
  • Helps your body learn to burn fat
  • Improves insulin resistance
  • Induces mild ketosis
How to do it?
  • Follow balanced meal plans for The Very Fast 800 on our programme
  • Eat 800 calories daily with a low-carb Mediterranean-style diet
  • Use The Fast 800 Shakes for easy calorie control

Burn fat by flipping the metabolic switch

We rely on two fuel sources: glucose and fat. Regular eating provides a steady glucose supply for energy, with excess stored as fat if not burned off.

During fasting or reduced carbohydrate intake, glucose runs out, and the body switches to burning stored fat for fuel—a process known as ‘flipping the metabolic switch’.

Improve insulin resistance by giving up snacking

Consistently high blood sugar from sweet or carb-heavy meals damages arteries and nerves and affects your pancreas, which produces insulin. The hormone insulin regulates blood sugar by moving it into muscle cells for energy. In insulin resistance, muscles struggle to use this energy, diverting it to fat storage instead. This leaves you craving snacks, gaining weight and feeling hungry, despite eating.

How to get started

Join The Fast 800 12-Week Programme to receive step-by-step guidance, expert videos, meditations, and a complete exercise plan.

Prioritise a low-carb, Mediterranean style diet

  • Consume 800 high-quality calories daily for 2 to 12 weeks.
  • Focus on balanced nutrition, variety, and satiety to stay on track.

Pair with time-restricted eating (TRE), exercise and mindfulness

  • Eat within an 8, 12, or 14-hour window.
  • Boost activity with resistance training and HIIT workouts.

Optimise your support tools

  • Use The Fast 800 Multivitamins, tailored for weight loss to meet essential nutrient needs.
  • Enjoy The Fast 800 Shakes, a protein-rich, low-sugar, Mediterranean-inspired option—ideal for busy days.

More than a diet programme

  • Education on science-based lifestyle best practices
  • Easy and delicious nutritionist-developed recipes
  • Tailored exercise and meal plans
  • Personalised tracker and exclusive community
  • FREE 7-day trial, start today!
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Weight loss and fasting nutrition

  • Keep you full and satisfied
  • No added sugar or simple carbs
  • High in protein, fibre and quality fats
  • 100% vegetarian and made from natural ingredients
  • Essential vitamins and minerals
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Try the Programme for free

Sign up today and your 7-day free trial begins immediately. Week 1 of your programme will start on: Monday 5th May

Do you need help with different goals?

The New 5:2

Looking for an effective, gradual way to lose weight and keep it off, long-term?

  • Regular intermittent fasting
  • Low-carb Mediterranean-style recipes
  • Effective, gradual way to lose weight

The Way of Life

Looking for long-term maintenance of weight and metabolic health?

  • Ideal for weight maintenance
  • Mediterranean-style recipes
  • Long term approach for metabolic health

Frequently Asked Questions

Browse through our most commonly asked questions

How does The Very Fast 800 diet plan work?

How many calories can you eat on The Very Fast 800?

Do you feel hungry on an 800-calorie diet?

How much weight will I lose?

How long can I follow this fast weight loss diet for?

Who can follow The Very Fast 800 diet?

Is rapid weight loss healthy?

Can I exercise on The Very Fast 800 diet?

Should I have weight loss shakes on this diet?

What happens after I complete the 12 week programme?