Adele has completely transformed her physique over the past few years, and in a new series of snaps shared on social media to celebrate her recent birthday, the Grammy Award-winning singer looked absolutely stunning.
MORE: Adele reveals she works out 'two or three times a day' in new interview
Her diet has been the source of much speculation including claims she followed the Sirtfood eating plan, best known for encouraging those following it to still enjoy red wine and chocolate. However, in an interview with Vogue last year, Adele revealed exactly how she has slimmed down, and it's mainly down to daily exercise.
WATCH: Adele jokes about her weight loss on TV
Adele said: "It was because of my anxiety. Working out, I would just feel better. It was never about losing weight, it was always about becoming strong and giving myself as much time every day without my phone."
The star explained she hasn't been on any particular diet, saying: "If anything I eat more than I used to because I work out so hard."
While Adele dismissed claims she's done the Sirtfood diet or had tried "intermittent fasting", here's everything curious fans need to know about the diet following her juicy new interview...
SEE PHOTOS: Adele looks unrecognisable after huge weight loss
What is the Sirtfood diet?
Also referred to as the 5:2 diet, the Sirtfood diet is based on scientific research on sirtuins (SIRTs), a group of seven proteins found in the body that has been shown to regulate a variety of functions, such as our metabolism, inflammation and lifespan.
The Sirtfood diet plan focuses on upping your intake of healthy Sirtfoods. These include the following:
- Citrus fruits
- Red wine
- Dark chocolate
- Medjool dates
- Green tea
- Olive oil
- Red onion
Although many Sirtfood diet plans encourage calorie restrictions and fasting, you may wish to ease yourself into a more restrictive diet if you're not used to it. All recipes on the plan for breakfast, lunch and dinner boast a long list of health benefits - so if you prefer eating three meals a day, you can still make and enjoy these delicious Sirtfood recipes.
RELATED: Adele's 7 body confidence and fitness secrets revealed
What do you eat for breakfast on the Sirtfood diet?
Sirtfood meal plans recommend drinking the staple green juice up to three times a day
A typical breakfast might be a large glass of super-healthy green juice, often referred to as a "Sirtfood staple". The juice is a delicious blend of iron-rich leafy greens like kale and rocket and celery, sweetened with green apple, matcha and a hint of lemon.
This green juice is a great alternative for those who love caffeinated drinks, particularly because the matcha is an antioxidant-rich source of caffeine.
Alternatively, this date and walnut porridge is super simple to make and packed with delicious berries for those who have a sweet tooth.
What do you eat for lunch on the Sirtfood diet?
'How do you like your eggs?' Like Adele's please!
A typical lunch on the Sirtfood diet could be a warming Shakshuka - a Mexican-inspired recipe of baked eggs, tomato and kale. This hearty, healthy dish complete with runny yolks can be made in a large pan and served with buckwheat pitta for dipping – perfect for sharing!
What do you eat for dinner on the Sirtfood diet?
This delicious recipe has a fiery chilli kick
Who said you can't diet and eat pasta? This delicious king prawn arrabiata is a Sirtfood favourite – perfectly filling and full of flavour. Yum!
Before embarking on a weight loss journey, it's always important to make sure you're doing this for you. Adele's former personal trainer Pete Geracimo gave an insight into Adele's motivation to kickstart her body transformation and stressed the star lost weight entirely on her own terms.
In an Instagram post, he wrote: "When Adele and I started our journey together, it was never about getting super skinny. It was about getting her healthy. Especially post-pregnancy and post-surgery."
If you would like to discover more about the Sirtfood diet, which was once rumoured to be followed by Prince Harry, you can find some delicious recipes - including plant-based alternatives, in the book below.
Sirtfood Diet 3 Books in 1, £18.64, Amazon
HELLO!'s selection is editorial and independently chosen – we only feature items our editors love and approve of. HELLO! may collect a share of sales or other compensation from the links on this page. To find out more visit our FAQ page.