Anyone on a health journey will know that 101 is kicking the junk food.
But one man appears to have found the magic elixir as he's managed to lose weight and get more ripped by eating nothing but pizza.
Please teach us your ways.
Personal trainer Ryan Mercer took part in the unusual 30 day challenge (which honestly doesn't sound like a challenge) by eating 10 slices of pizza every day and sharing the results online.
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Despite eating pizza for breakfast, lunch and dinner, he managed to lose a whopping three and a half kilograms in one month and the 34-year-old says he's more ripped than when he started.
Ryan, from Bangor in Northern Ireland, took on the challenge to show how calorie deficit diets can still work, even if you continue to enjoy your favourite foods.
He explained: "January is a tough month for people when it comes to fitness goals.
"I aimed to highlight not only fat loss about calories in and calories out, but that it's also not about restriction.
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"We don't have to restrict our favourite foods to get results and I also wanted to encourage more people to prepare their own food."
Now, that's not to say the fitness expert is going to carry on his pizza diet forever.
He follows a flexible approach to eating, enjoying his favourite foods while ensuring he gets a healthy protein intake and seven to 10 portions of fruit and vegetables each day.
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Speaking about what it was like to eat pizza for every meal for 30 days, he said: "I had two pitta pizzas and one larger dough-based pizza per day, this equated to roughly 10 slices per day.
"Additionally, I left room for additional snacks."
"The hardest part of the entire diet was the preparation," he continued.
"Pizza is one of my all-time favourite foods, so I enjoyed eating it all month, although I did ensure I had a large variety of different pizzas to give myself some variance."
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Alongside the weight loss, Ryan saved himself a fair bit of dough (pun fully intended) throughout the month.
He added: "I home-cooked everything. The estimated daily cost was around £6-a-day for two pitta pizzas, and one dough-based pizza and three side salads.
"Additionally, I spent around £2 or £3 per day on snacks."
At the end of the month, Ryan became leaner and subsequently surprised many of his followers online.
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He said: "This was a carefully planned dietary strategy. I designed a system, and this is what got me to my goal.
"Daily calorie intake was set at 1800-2100 Monday to Friday, 2,700kcal Saturday and Sunday, daily protein target 140g per day, daily fruit and vegetable portion goal, seven portions minimum per day."
While it proved a success, that's not to say you should go switching your long-term diet to do the same. As said by Ryan, 'everyone is different'.
The personal trainer finished by saying: "I feel [that the video] has highlighted the confusion among the masses when it comes to fat loss and nutrition.
"I've had some negative comments, some very funny ones and of course some positive feedback.
"One thing we have in common is we all eat food so everyone has some sort of opinion when it comes to nutrition."
Topics: Food And Drink, Health, Viral
Daisy Phillipson