What is a Low Calorie Diet?

A low calorie diet is a clinically proven diet plan that involves eating about 800 calories a day.
They are considered for overweight and obese people who are managing diabetes.

Our Featured Diet Plans

OPTIFAST offers several plans for you to choose from, depending on your weight loss goals and your personal lifestyle.

Full 6 Week Diet Plan

Our Six-Week Plan combines nutritional knowledge and exercise tips with behavioural strategies that can fit easily into your lifestyle.

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Intermittent Fasting Plans

It offers the flexibility to switch between periods of fasting and eating, without restricting your caloric intake for days in a row.

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Partial Meal Replacement Plan

You can create your own weight loss plan by deciding how many meals a day you’d like to replace with our OPTIFAST meal replacement products.

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Maintenance Plan

Designed to help you to maintain your desired body weight, particularly after weight loss

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1 Week Trial Pack

Can't decide which Plan is right for you? Try our 1 Week Trial Pack.

This pack is specially designed to help people in their weight loss journey in a structured and efficient way whilst getting to know OPTIFAST products.

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Find Your Perfect Diet Plan

Find a Diet Plan that is tailored to your specific needs and goals.

Click below to calculate your BMI and find a Diet Plan that's recommended for you.

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Selected by a Provider of the NHS Pilot

OPTIFAST is a preferred product for Oviva, a provider for the NHS Low Calorie Diet programme