Yeah, Adele spoke about the weight loss last year (I think) and mentioned working with the inevitable trainer and eating what actually was a significantly low number of calories - way, way under what Dr. Now would give someone much larger who needed to lose weight or die within a year - 700-800 a day I think was the reported amount. Nobody should be giving anyone under 1200 a day. If you need to lose weight you will do so easily on that, and many people can and should eat a bit more and lose if they are working out daily too.
I don't know the details of her diet plan, but ULC diets (ultra low calorie diets) are hideously outdated and not the way to sustainable weight loss as pretty much anybody knows these days, although it will obviously result in drastic weight loss in the short term. There are trainers who will - when it is entirely outside their scope of practice and they should not be doing this - give diets to clients though. I imagine the celeb world is awash with those. That Tracy Anderson who used to work with Madonna and Paltrow used to have clients on a few hunded calories a day while lifting their stupid 1lb weights interminably ... Tracy being uneducated in the field of nutrition (and face it, exercise, anybody who says women should never lift more than 3lb because they will get 'bulky' is a true moron) and a known major bulimic who used to leave the toilets in her old facility smelling of puke on a daily basis according to clients (and who had clear bulimia jaw in many of her red carpet pics), but she still had famous, rich women hanging onto her advice becuase they did thin out on it, as anybody thins out on ULC + hours of repetitive calisthenics a day with tiny weights clutched in their hands.
I hope she can keep the weight off but usually when someone who has been fat for most of their life loses shedloads in a short time from crash dieting (700-800 is the defintiion of that) they haven't spent any time learning how to eat normal amounts of food, did not get the nutirents they needed while dieting (whatever they tell you), and generally relapse at some point. It's why the FAs always spaz about weight gain being inevitable, really, the world of crash dieting which for many years was all people knew how to do and what was marketed by the diet industry, meant most people who dieted yo-yoed drastically over the years. Crash diets are part of why FAs and the like think all diets are 'starvation', because that's what they are, they're horrible for your health, unsustainable and don't teach you a thing about how to eat to stay a normal weight. It's feast or famine in that world.
I get the idea Adele wanted fast as fuck weight loss as celebs often do way more than normal folks due to being in the public eye and haviing themselves commented upon in the press, and paid someone who'd help her do it. God knows in celeb world its easy enough to find someone to help you do anything, however bad for you, if you pay them enough. I hope she can eat normally now to stay within a healthy weight category, but I do wonder.
People like Adele have the means to employ cooks to feed them appropriate-sized meals, and can pay for dieticians to make a plan for the cooks to prepare for them, but in the end , that doesn't mean much if they are driven to use food as comfort, or just have a very large appetite and can eat what they want. Look at Oprah, ffs. Billionaire who could employ someone to feed her salad with a silver fork, but she yo-yos in weight all the time.