Fasting FAQ


1. What does fasting involve?

Fasting for a day is something many people do. It is actually recommended by health specialist as a way to restart your body. The things that you can and can’t do depend on you and what you feel is appropriate for you. You can find lots of information online, here are a couple of websites that provide information about healthy ways of fasting:

2. Who should NOT fast

According to the NHS choices website, you should not fast if you are:

  • Underweight (BMI < 18.5)
  • Pregnant – you need extra nutrients for your child.
  • Breastfeeding – you need extra nutrients for your child.
  • A child under 18 – you need extra nutrients to grow.

You can fast, but may need supervision, under these conditions:

  • If you have diabetes mellitus – type 1 or type 2.
  • If you take prescription medication.
  • If you have gout or high uric acid.

4. How long do I need to fast for?

We will be fasting for 24 hours. We encourage people to do what they feel able to do. 

5. What happens to my body when I fast?

According to the NHS choices website, the changes that happen in the body during a fast depend on the length of the continuous fast. The body enters into a fasting state eight hours or so after the last meal, when the gut finishes absorbing nutrients from the food.

In the normal state, body glucose, which is stored in the liver and muscles, is the body’s main source of energy. During a fast, this store of glucose is used up first to provide energy. Later in the fast, once the glucose runs out, fat becomes the next source of energy for the body.

With a prolonged fast of many days or weeks, the body starts breaking down protein in the body (such as muscle) for energy. In a one day fast your body will not start this process.