It’s now 2020, the start of a New Year, and for many people that means following a set of resolutions, one of the most common of which will be to lose weight over the next 12 months. But if you’re keen to shed some pounds in 2020, don’t try to do it using fad diets because they don’t work and can even be harmful, says NHS England’s top doctor. Speaking about diet pills, "tea-toxes" and appetite suppressant products, Prof Stephen Powis, NHS medical director, said they are not quick fixes. Furthermore, they can even cause side effects, such as diarrhea and heart issues, he added. How to spot a fad diet? Well, according to the British Dietetic Association (BDA), any diet that promises rapid weight loss of more than 2lbs (0.9kg) of body fat a week should be viewed with caution. If it sounds too good to be true, then it more than likely is – despite any celebrity recommendations it might have. The best way to get in shape safely is through sensible eating and regular exercise. Professor Powis also warned the public against using so-called ‘party drips’ as quick fix hangover cures. These nutrient therapy IV drips are usually made up of saline solution, magnesium, calcium, B vitamins and vitamin C. But some individuals can react badly to them and, in the most serious cases, death can occur due to a toxic overdose.