A few weeks ago I bought a copy of the bestseller The Fast Diet to see what it was all about. In case you don’t know, it was published as a result of the interest in the BBC Horizon documentary about Intermittent Fasting (IF), written by the programme presenter Dr Michael Mosley and journalist Mimi Spencer.
I believe that fasting is beneficial, but not necessarily advisable for everyone, so I wanted to read the book to discover new information and research, but also I was curious to see if it contained any words of caution. There are words of caution about fasting; a paragraph on page 124 warns those with Type 1 diabetes not to fast, those with an eating disorder, children, and those who are already very slim. Also, anyone with an underlying medical condition should consult a doctor first.
If you bought a copy of my book, Eating Less, between 1998 and the first half of 2005, you’ve got an edition that contains a chapter on fasting once a week. As well as instructions on how to fast in a non-addictive way, I describe some good reasons not to fast. In later editions, I took out all mention of fasting, partly because people weren’t paying any attention to those reasons. Perhaps it’s time now to put them back in (if I could) but here’s how they appeared in those first editions of Eating Less:
- It’s not a good idea to fast if you are desperate to lose weight, or if you have a history of anorexia or bulimia.
- It’s not a good idea to fast if you have a tendency to overeat either before or after a fast.
- It’s not a good idea to fast if you go on a fast as a way to take control of your overeating.
- It’s not a good idea to fast if you are not in the best of health, if you’re coming down with an illness or recovering from one, or if you suffer from a condition such as diabetes or hypoglycemia.
- It’s not a good idea to fast if you don’t normally eat a high-quality diet at other times.