From viral TikTok clips to Instagram “nutrition hacks”, weight loss advice has never been more accessible — or more misleading. According to a leading nutrition expert, many of the most popular diet tips circulating online are not only unsupported by science but may actually be sabotaging long-term health goals.
Kevin Greene, Medical Scientist, Nutritionist and Managing Director of Almased, has identified five of the most damaging weight loss myths currently gaining millions of views across social media. He warns that believing these misconceptions can leave people frustrated, exhausted, and more likely to give up on sustainable lifestyle changes altogether.
Myth 1: Skipping Meals Helps You Lose Weight Faster
Skipping meals is often framed as a shortcut to fat loss, but Greene says the opposite is usually true.
“Eating regular, balanced meals throughout the day supports metabolism,” he explains. “When you skip meals, your body may compensate by slowing down metabolic processes.”
Missing meals also triggers hunger hormones such as ghrelin, which can lead to fatigue, cravings, and overeating later in the day. Research consistently shows that people who regularly skip meals often consume more calories overall than those who eat consistently. Greene recommends sticking to three balanced meals per day to keep energy levels stable and support metabolic function.
Myth 2: Eating Carbs After 6pm Causes Weight Gain
One of the most persistent diet myths claims that carbohydrates eaten in the evening automatically turn into fat. Greene says this idea ignores how the body actually works.
“Your metabolism doesn’t switch off at night,” he explains. “What matters most is your overall nutritional balance and total daily intake, not the clock.”
Studies published via the National Library of Medicine show that long-term weight maintenance is challenging regardless of carbohydrate timing, with only around 25% of people maintaining weight loss over time. However, growing public interest in nutritional science suggests more people are moving away from rigid food rules toward sustainable eating habits.
Myth 3: All Calories Are the Same
While calorie counting remains popular, Greene stresses that not all calories affect the body equally.
“100 calories from protein behaves very differently to 100 calories from sugar,” he says. Protein has a higher thermic effect of food, meaning the body burns more energy digesting it — up to 20–30% of its calories, compared to 5–10% for carbohydrates.
Protein also supports satiety, preserves lean muscle mass during weight loss, and helps maintain a healthy metabolism. Greene notes that nutritionally complete, high-protein options — including those offered by Almased — are supported by clinical research for their role in muscle preservation and metabolic support.
Myth 4: You Need Intense Exercise to Lose Weight
Extreme workouts are often glamorised online, but Greene says intensity is not the key to sustainable weight loss.
According to NHS physical activity guidelines, adults should aim for at least 150 minutes of moderate activity per week — such as brisk walking or cycling.
“Walking for 30 minutes a day alongside balanced nutrition often delivers better long-term results than punishing gym routines paired with poor eating habits,” Greene explains. “Consistency matters far more than intensity.”
Myth 5: Detox Diets Burn Fat
Detox teas, juice cleanses and “reset” diets promise rapid results, but Greene warns they are among the most misleading weight loss trends.
“The idea that detox products flush fat from your body is a dangerous misconception,” he says. “Your liver and kidneys already detox your body naturally.”
While people may feel lighter during a cleanse, this is usually due to water loss or calorie restriction — not fat loss. Many detox diets also lack sufficient protein, which can lead to muscle loss, slowing metabolism and harming long-term health.
“Retaining muscle while losing weight is critical,” Greene adds. “Real, lasting results come from consistent, healthy habits, not quick fixes.”
As misinformation spreads rapidly across social platforms, Greene urges people to prioritise evidence-based nutrition and realistic lifestyle changes. Choosing nutritionally complete options, maintaining regular meals, staying active, and avoiding extreme approaches are key to sustainable weight management.
