Intermittent fasting seemed to be the solution everyone had been waiting for for a while. It was straightforward, clean, and didn’t involve any counting. It seemed that everything would work itself out if you simply stopped eating after 7 p.m. and moved breakfast to noon. Millions of women in the UK embraced it. Some people vowed to do so. Others, convinced that the discomfort was a sign that it was working, quietly white-knuckled their way through the morning hunger.
It wasn’t always effective. Based on data from 22 international studies and almost 2,000 adults, a significant review released in early 2026 discovered that intermittent fasting resulted in an average body weight loss of just 3%, which is significantly less than the 5% threshold that medical professionals deem clinically significant.
The difference was insignificant when compared to traditional dietary recommendations. It was hardly better than doing almost nothing at all. The Cochrane Database of Systematic Reviews, which has about as much weight as it gets in evidence-based medicine, is where the researchers published their findings. Lead author Dr. Luis Garegnani succinctly concluded that intermittent fasting is “not a miracle solution.”
That’s a pretty polite way of saying that the hype was significantly ahead of the evidence. The fact that everyone’s experience of fasting is different makes this especially fascinating for British women. Women, especially those who are premenopausal, may be more susceptible to the cortisol spike that prolonged fasting triggers due to hormonal differences, as researchers and nutritionists have long noted. It’s not just uncomfortable to skip breakfast when juggling a full morning of work, school runs, or exercise.
Some women experience a stress cycle that worsens their mood and metabolism by midday. The body reacts appropriately because it interprets the missed meal as a scarcity. Dips in energy. Concentration wanes. It’s also more difficult to resist the urge to overeat when the eating window eventually opens than most people realize.
Looking at online forums and wellness communities over the past year or so, it seems like a subtle change has been taking place. Women who used to post enthusiastically about their 16:8 windows are now writing about stopping the clock at 12 hours instead of 16, reintroducing breakfast, and increasing protein. The more manageable middle ground is the 12-hour overnight fast, which basically entails eating dinner at 7 p.m. and breakfast at 7 a.m. Without the long-term restriction that seems to backfire for so many, it honors the body’s natural rhythms.
They are substituting something less dramatic for fasting. More protein at every meal to promote satiety and muscle retention, more fiber to slow digestion and stabilize blood sugar, and a general shift away from strict time windows toward paying attention to real hunger signals are all practically obvious. Working with women in this field, nutritionists characterize it as a sort of collective maturity—a realization that the more punishing the diet, the less sustainable it tends to be.
It’s still unclear if this change will continue or if the wellness industry will just create the next fasting-replacing structured eating fad. For decades, that has been the pattern. But there’s something different about the present. More women appear to be coming to the same conclusion on their own: that skipping meals in order to lose weight is a much messier proposition than the morning Instagram posts made it look. This is because science has caught up and personal experience has accumulated.
The late Michael Mosley had a genuine and significant influence on the introduction of intermittent fasting into British homes, more than anyone else. However, a closer look reveals that even the 5:2 diet he promoted performs about as well as just cutting back on food, which is ultimately the oldest and least glamorous nutritional truth. The fasting structure is still useful as a framework for some people.
That is not insignificant. However, the researchers who have studied it the most have largely rejected the notion that it contains some metabolic magic beyond calorie management. It appears that British women arrived somewhat ahead of the data.
