Fasting has been hailed as everything from a weight-loss wonder to the secret of eternal youth. Scroll social media and you’ll see everyone from biohackers to busy mums praising intermittent fasting as the ultimate health trick. But is it really a miracle, or just a more expensive way of saying “I missed
lunch”?
What is fasting, really?
At its core, fasting simply means going without food for a set period. Intermittent fasting is the trendy version, usually eating within a set “window” (say 12pm to 8pm) and fasting the rest of the time. Sounds straightforward, but the science is a bit more nuanced.
The supposed benefits of fasting
Research suggests fasting may:
- Help with weight management by reducing overall calorie intake
- Improve insulin sensitivity (which supports blood sugar balance)
- Give your digestive system a break
- Potentially support heart health and reduce inflammation
That’s the sales pitch. And yes, some studies do back it up. But before you bin breakfast forever, here’s the flip side.
The downsides no one on TikTok mentions
- Hunger and low energy — not great if you’ve got kids or a demanding job
- Headaches, irritability and mood swings in the early days
- Risk of bingeing once the “eating window” opens
- Not suitable for children, teenagers, pregnant women, or anyone with a history of disordered eating
In short: fasting can be helpful for some, but it’s not the silver bullet it’s often made out to be.
So, does fasting work?
If your goal is short-term weight loss, fasting may work. But it’s not magic. The benefits often come from eating less overall and cutting out late-night snacking, rather than from fasting itself. For long-term health, the evidence is still mixed.
A balanced approach to eating — regular meals, whole foods, less ultra-processed stuff — has far more research behind it. And unlike fasting, it doesn’t leave you eyeing up the office biscuits at 11am.
FAQ: fasting in plain English
Is fasting good for you?
It can be, for some people. But it’s not a cure-all and it can come with downsides.
What are the risks of fasting?
Low energy, irritability, headaches and potential bingeing are common. It’s not safe for children, teenagers or those with certain health conditions.
Does fasting help with weight loss?
Often, yes but mainly because you eat fewer calories overall. It’s not inherently better than any other balanced approach.
Is intermittent fasting sustainable?
For some, yes. For others, constantly skipping breakfast or dinner feels miserable. The best “diet” is one you can actually stick to.
