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6 Week Diet Plan

Our Six-Week Plan was developed for people who want to lose weight on their own, using a clear framework.

Centred around scientifically designed OPTIFAST products, our Six-Week Plan combines nutritional knowledge and exercise tips with behavioural strategies that can fit easily into your lifestyle.

How does it work?

First 3 Weeks – Replacing all daily meals

• Enjoy 4 Optifast meal replacements per day as your sole food consumption

• Total calories intake per day: average 800 kcal

• Avoid strenuous physical activity


Last 3 weeks – Reintroducing conventional meals

• On your week 4 & 5: 1 low-calorie cooked-meal (start with non-starchy vegetables and lean protein) + 3 Optifast meal replacements per day

• On your week 6: 2 low-calorie cooked meals + 2 Optifast meals per day

• Conventional meal recommendation: low in carbohydrates and minimally processed foods. Recipes available here

• Total calories intake per day: stay between 1,400 and 1,700 kcal

• Regular light exercise program should be included


End of 6 weeks

Maintain your weight loss with our Maintenance Plan or one of our Intermittent Fasting Plans.

A program of regular light exercise enhances wellbeing and therefore the likelihood of success.

Choose Your Plan

We are offering 3 plans to fit different stages of your weight loss journey.

You can start with 3 weeks plan and continue your journey with the last 3 weeks plan or commit to the full 6 weeks diet plan from the beginning.

All you need to know in 60 seconds

OPTIFAST Support Hub

Check out our blog for more recipes, workouts and tips.
Caroline is here to support you in your choices of meal replacement products and weight loss plans.

Speak to our dietitian

Caroline is on hand to provide expert advice when it comes to choosing you meal replacement products and weight loss plans.