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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.