06/09/2019
Not all eating strategies work the same for everyone. Don’t follow a style of eating because it works for someone you know. Book an appointment with a registered dietician who can guide you along a healthy lifestyle that suits you.
Witten with help from Dr. Rona Antoni, intermittent fasting researcher and RD.
Intermittent fasting is a legitimate weight management strategy backed by some high quality research.
It has also been highjacked by Diet Culture, with people now selling fasting plans (imagine people making money from telling you NOT to eat) and even the ‘biohacking’ community are promising that fasting is the elixir for everlasting life.
If you had seen a dietitian or doctor 5 years ago and reported that you were fasting for extended periods, you would have been sent to an eating disorders clinic. Research moves on and intermittent fasting is now known to be an effective weight management strategy for some people.
That said, as with all dietary protocols, people are taking fasting to the extreme and it has become a very convenient way for people with a disordered relationship with food to legitimise skipping meals.
Forms of intermittent fasting that are evidence based include time restricted eating, where you’re reducing your feeding window to 8-12 hours, either skipping breakfast and/or not eating too late and intermittent energy restrictions (e.g. the 5:2 diet; alternate day fasting) where you eat a very low calorie diet for several days a week.
We know that FOR SOME PEOPLE these strategies can help to manage weight and also have the potential to improve insulin sensitivity and fat metabolism. Some (but not all of these effects ) are due to the weight loss/calorie deficit these diets can create. Many of the other reported benefits including autophagy and cancer prevention are not supported by evidence in humans.
As with all ‘diets’ a fasting protocol that means that you are avoiding social eating, ignoring hunger cues for extended periods, feeling lightheaded or struggling to concentrate, getting headaches or lacking energy for exercise or struggling to sleep due to hunger NEEDS TO BE REEVALUATED.
If you have stopped eating with your loved ones in the evening because you’re fasting, you’re probably not on the right protocol for your mental and social health.
It is important that all ‘diets’ need enough flexibility to feed your social life as well as your body. Remember, no diet needs to be enforced 24/7. What if you just did time restricted feeding 3 days per week? What if you didn’t have any rules at the weekend?
There is no established benefit to restricting eating to a window shorter than 6-8 hours so those only eating for shorter widows of time are likely to be over restricting.
Fasting in the morning works for me but mainly because my appetite is low in the morning (and completely unmanageable the rest of the day!). Anyone who wakes up hungry should listen to their body. Anyone going to bed hungry should listen to their body. There are so many ways to achieve a calorie deficit if that is what is needed and we are all different. Finding something that is sustainable FOR YOU is essential.