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OPTIFAST 6 Week Weight Loss Plan

The OPTIFAST 6 Week Diet Plan has been developed for people who want to lose weight using a clear framework that combines nutritional knowledge, exercise advice and behavioural strategies to help you to kickstart a lifestyle change.

What is 6-week Diet Plan on OPTIFAST

OPTIFAST 6-Week Diet Plan is specially designed to help you achieve significant weight loss and changes to your eating habits. During the first three weeks of the plan, you’re suggested to limit your calorie intake to around 800 by replacing up to two of your conventional meals with OPTIFAST meal replacement products. You can gradually introduce your conventional meals for the rest of the plan.
OPTIFAST 6 Week Diet Plan

What to expect from the 6 Week Diet Plan

Here’s what you can expect from our 6-week weight loss plan:

First 3 Weeks

· Replace up to 2 of your daily meals with OPTIFAST products - 2 main meals with OPTIFAST Shakes, Soups or bars.

· Enjoy OPTIFAST meal replacement products alongside 1 low-calorie (200-250kcal), low carbohydrate meal prepared with minimal processed foods, for a total calorie intake of 800-1000 per day.

· Avoid strenuous physical activity

Last 3 Weeks

· Gradually reintroduce conventional meals in place of the OPTIFAST meal replacement products, for a total calorie intake of 1,200 per day.

· By week 6, you should be consuming up to 2 OPTIFAST products per day alongside 2 low-calorie, low carbohydrate meals prepared with minimal processed foods, for a total of up to1,200 calories a day for women and 1,500 calories a day for men. Find recipe inspiration here

· Include daily light exercise as part of your routine

After 6 Weeks

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

· Continue to include daily light exercise to enhance your wellbeing and increase your likelihood of success. Find fitness advice for your weight loss journey here

Full 6 Week Diet Plan


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

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Why Choose OPTIFAST Six Week Diet Plan?

The OPTIFAST Diet Plan is specially tailored for those who’d like to lose weight. This 6-week diet plan will ask you to replace up to three meals a day with OPTIFAST meal replacement products for the first three weeks to limit your calorie intake to around 800, helping you achieve significant weight loss. It’s advisable to avoid strenuous physical activity.

OPTIFAST Support Hub

Visit our blog for recipe inspiration, fitness support, nutrition advice and more while you’re following your weight loss journey.

6 Week Diet Plan FAQs