Firstly, you will need to figure out how many calories you plan to eat each day outside of your plan. Have a look here for a handy guide on the calories in common food items - otherwise, you can have a look online to get some estimates, or use the FFF app!

Please bear in mind that the minimum size for each meal is 350 calories, so it won't be possible to add in a buffer that makes your meals from FFF smaller than 350 calories, so you may notice a limit there.

Follow these instructions to add a calorie buffer to your account:
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1. Sign in to your FFF account and go to 'Manage nutrition' tab on the left hand side.
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2. Scroll down to 'Daily meal plan', and click on to the edit pencil in the right hand corner.
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3. Under 'Calorie allowance', use the sliding bar to add a calorie allowance.
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4. Scroll down and click 'Save changes' to save your changes.
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Please note that all changes take two business days to come into effect.