Obesity is a complex condition, one with serious social and psychological dimensions, that affects virtually all age and socioeconomic groups and threatens to overwhelm both developed and developing countries. In 1995, there were an estimated 200 million obese adults worldwide and another 18 million under-five children classified as overweight. As of 2000, the number of obese adults has increased to over 300 million. Contrary to conventional wisdom, the obesity epidemic is not restricted to industrialized societies; in developing countries, it is estimated that over 115 million people suffer from obesity-related problems. This is not to say that all commercial diet programmes are unsafe. Many are based on sound medical and scientific principles and can work well for some people.

eating more slowly and being mindful of what and when you're eating – for example, not being distracted by watching TV As well as helping you maintain a healthy weight, physical activity also has wider health benefits. For example, it can help prevent and manage more than 20 conditions, such as reducing the risk of type 2 diabetes by 40%.a body mass index (BMI) of 28 or more, and other weight-related conditions, such as high blood pressure or type 2 diabetes Strengthen Your Immune System, Fight Off Infections, Reverse Chronic Disease and Live a Healthier Life

When the research is taken together, it is clear that the obesity fix cannot be boiled down to eating this or that food type or to taking any other simple action. Many factors contribute to the problem. It is partly environment—the eating habits of your friends, what food is most available in your home and your local stores, how much opportunity you have to move around at work. It is partly biology—there are genetic predispositions for storing fat, for having higher satiety thresholds, even for having more sensitive taste buds. It is partly economics—junk food has become much cheaper than fresh produce. And it is marketing, too—food companies have become masterful at playing on human social nature and our evolutionary “programming” to steer us toward unhealthy but profitable fare. That is why the narrow “eat this” kinds of solutions, like all simple solutions, fail.Obesity is complex: Researchers have developed key insights into its metabolic, genetic and neurological causes. But this work has not amounted to a solution to the public health crisis. You'll have a review after taking liraglutide for 3 months, or after taking semaglutide for 6 months. You'll then usually only carry on taking the medicine if you've lost at least 5% of your body weight. You may need to exercise for longer each day to prevent obesity or to avoid regaining weight if you've been obese. To prevent obesity, 45 to 60 minutes of moderate-intensity activity a day is recommended. To avoid regaining weight after being obese, you may need to do 60 to 90 minutes of activity each day.