Made by fasters, for fasters.

Established January 2013 as The 5:2 Fast Diet Forum

EVERYTHING YOU NEED TO KNOW TO START THE 5:2 FAST DIET

We'll help you get started with the 5:2 intermittent fasting diet

FastDay is a community of 5:2 dieters keen to share our collective knowledge and experience with you. Whether you want to learn about fasting windows such as 16:8 or Fast-5, ADF (Alternate Day Fasting) or the original 'Fast Diet' (aka 5:2 diet) we have articles to help you with all of them and a wealth of intermittent fasting experience at the FastDay forum.

FAQ · FORUM · LEARN · SUCCESS

Read some inspiring success stories from our FastDay members & team

POPULAR ON FASTDAY

Some of our most popular articles for new intermittent fasters...

Different ways of intermittent fasting

Why the scales don't tell the truth - understanding weight fluctuations

The basics of nutrition and healthy eating

Prevent constipation after fast days

How can I prevent constipation after fast days?

Prevent fasting headaches & light-headedness

Preventing headaches and light-headedness when fasting

The Good, The Bad & The Ugly: 10 unexpected surprises when you start fasting - Part 1

LEARN MORE ABOUT FASTING

NEW ON FASTDAY

Our latest posts about 5:2 intermittent fasting

Eat, Fast & Live Longer

18th August 2017

5 things that surprised people when they started intermittent fasting

28th July 2017

5 favourite lunch ideas from long-term 5:2 fasters

11th July 2017

START THE 5:2 DIET WITH HELP FROM FASTDAY

Be healthier. Lose weight. Eat the foods you love, most of the time.

Learn about the 5:2 diet

LEARN ABOUT FASTING
We've got loads of info about intermittent fasting, written in a way which is easy to understand. Whether you're wondering about side effects or why the scales aren't budging, we've got all you need to know.

Your intermittent fasting questions answered

ASK QUESTIONS & GET SUPPORT
Come along to the FastDay Forum, we're a friendly bunch and happy to answer your fasting questions and offer support. Why not join in one of our regular challenges to help you towards your goal weight?

Use our free 5:2 diet tracker

FREE 5:2 DIET PROGRESS TRACKER & BLOG
Tracking your diet progress is great for staying motivated. Chart your measurements and keep tabs on your daily calorie needs. You can even create a free blog to journal your 5:2 experience!