Frequently Asked Questions
OPTIFAST® is a range of shakes, soups, bars and desserts, designed to support weight loss. Each serving provides valuable vitamins, minerals and protein, while helping you to limit your calorie intake.

You can choose from the following products and flavours: OPTIFAST shakes: available in Chocolate, Coffee, Strawberry and Vanilla flavours. OPTIFAST soups: available in Vegetable, Tomato and Leek and Potato flavours. OPTIFAST meal bars: available in Berry, Chocolate, Cereal and Capuccino flavours. OPTIFAST desserts: available in Chocolate and Vanilla flavours.


You can find a full list of ingredients and nutrition information on any Optifast pack or on the product pages. If you have any questions about the ingredients in Optifast you can contact us through Live Chat or email us through your account once logged in.


You can find a full list of ingredients and nutrition information on any Optifast pack or on the product pages on site. If you have any questions about the ingredients in Optifast you can call 0800 880 7031.


If your new diet contains a very different amount of fibre compared to what you are used to, it is possible to experience some digestive changes such as a change in bowel habit, bloating, or flatulence. As you adjust to your new plan this should settle down. If you experience persistent, severe or worrying symptoms, we advise you to seek advice from your GP


When used as a total diet replacement Optifast® provides all the nutrition you require, and there should be no need to take additional supplements. If you have a diagnosed deficiency or take prescribed vitamin or mineral supplements, we recommend you speak to your GP to decide if you need to continue these.


When following a total diet replacement plan, Optifast® should be used under the supervision of a healthcare professional such as a pharmacist, doctor, or dietitian. Medical conditions and medications must be taken into consideration prior to deciding if the programme is appropriate for you. As well as this, research has shown that having the support and guidance of a healthcare professional is important in helping you to stay on track with your plan.


OPTIFAST programmes may not be suitable for everyone. If you take regular medications, or have a medical condition it's very important to check with your GP before embarking on intensive diet and lifestyle changes.


By keeping an eye on your weight regularly, you can get back on track quickly if you do notice some weight gain. Continuing your new healthy diet and lifestyle habits is very important when you finish any weight loss programme. Keeping a food diary can help you to spot clues to any possible weight gain.


No, OPTIFAST products are not suitable for use while pregnant or breastfeeding. We strongly recommend you seek advice from your GP if you are concerned about your weight gain during pregnancy. 


You can contact our customer services team via the live chat option or you can send an email to our team through your account.