Adele’s “skinny gene” diet is behind her slimmer figure. (Photo: Joern Pollex/Getty Images)

Well, “Hello” Adele!



Not only did the songstress snag five trophies at this year’s Billboard Music Awards (for Top Artist, Top Female Artist, Top Billboard 200 Album, Top Billboard 200 Artist, and Top Selling Song), the British powerhouse also debuted her slimmer, winning figure.



As reported by the Daily Mail, the 28-year-old (who just signed a record-breaking deal with Sony) has been shedding pounds by working with fitness trainer Pete Geracimo and by following Geracimo’s eating plan of choice, the Sirtfood diet.



Based on research from two nutritional medicine experts from the United Kingdom, its premise is to consume sirtfoods in order turn off the appetite and turn on “the skinny gene.”

So what’s a sirtfood?



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“This diet is one based on eating foods that activate sirtuins, proteins that protect the cells in our bodies from cell death and inflammation,” Isabel K. Smith, MS, RD, a New York City based celebrity dietitian fitness expert, tells Yahoo Beauty. “And it’s been said [that this process] is involved in metabolism and healthy aging.”



And yes, Smith says there is such a thing as the newly-named skinny gene. Clinically known as SIRT1, it’s understood to assist in weight loss by inhibiting fat storage while boosting metabolism since it serves as a means of survival in order to help humans — even mammals — during times of “starvation.” In fact, a study published in a 2015 edition of the journal Frontiers in Endocrinology, discovered that restoring SIRT1 function can prevent age-related weight gain in mice.



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As for the eating plan itself, Smith explains it includes many of the plant-based foods highlighted on reputable diets — such as kale, berries, dark chocolate, capers, green tea, apples, turmeric, parsley, and even red wine — and follows a two-phase approach. “It involves restricting calories to 1,000 calories daily in the first phase (the first three days) and then 1,500 calories in the second phase.” Dieters can expect to lose up to seven pounds in seven days.



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Along with the diet comes rigorous workout sessions, courtesy of Geracimo, who has also trained David Hasselhoff and Kim Cattrall. (Geracimo did not respond to Yahoo Beauty’s request for an interview.)

But is this plan too good to be true?



“Scientists have found genetic factors certainly related to weight loss, but I still think we need a more clear understanding of these genes and mechanisms,” states Smith.



And while she’s unsure if she’d offer this exact diet to her clients, she’s not completely against it, either. “I love to recommend richly colorful foods because they’re super-healthy, usually lower in calories and sugar, and the nutrients are so important for anti-aging, muscle recovery, and more,” she says. “But I think this diet needs to be more well-founded and looked into before I have my clients restrict calories to 1,000 per day.”



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