Michael Mosley has said including a certain range of foods in your diet can promote weight loss, by putting your body into a state of ketosis.
The diet guru - famous for his Fast 800 and 5:2 plans - has shared some top tips when it comes to dropping that stubborn bit of fat, the Mirror reports.
The doctor has released a book dedicated to keto dieting - called the 21 Day Keto Magic: Eat Healthy, Burn Fat, Lose Weight, And Keep It Off - which provides insight into how to implement the lifestyle.
A keto diet is "high in fat and protein and very low in carbs", which will force the body into a process called ketosis.
This process is what happens when the stored fat in your body is burned for fuel instead of carbohydrates.
It is a well-established way of losing weight, and there are certain foods that are important to this process.
So, what are these foods, and how can you include them in your diet?
Read on below to find out more.
What foods are good for ketosis?
There are certain foods that help encourage your body into a state of ketosis, according to Dr Mosley.
Our bodies are usually powered by a combination of fat and sugar, but burn fat when they are low on glucose.
Michael told the Mail: "Your body does this by releasing fatty acids from your fat stores and converting them into chemicals called ketone bodies. These can be used by most cells in your body as fuel.
"The process is known as 'flipping the metabolic switch'. Because so many of us top up our sugar stores by nibbling and snacking from first thing in the morning till last thing at night, we rarely get to flip the switch, so we seldom do a serious dive into our fat stores."
Michael's Fast 800 diet is a useful tool for losing weight, but those with medical conditions, or are pregnant or breastfeeding should consult their doctor before trying it.
Here are some useful foods that can be part of the keto diet.
Pancakes
While pancakes may not be looked upon as a healthy food, the way they are made can be huge in how good they are for you.
A 'keto pancake' can be made from cream cheese, eggs, vanilla extract or lemon, ground almonds, butter, full-fat Greek yoghurt and berries.
This type of pancake can be low in carbs and high in healthy fats, which means they can be enjoyed while keeping your calories low.
Fish
The keto diet doesn't mean cramming in fatty foods at any whim, but rather choosing the healthy fats that can benefit you - like fish.
Dr Mosley said: "Although fat is an important part of the diet plan, we recommend eating healthy fats (olive oil, oily fish, nuts and avocados), and only in calorie-counted moderation."
Cod or haddock can be steamed with vegetables like tomato, served with olives, green beans and pepper sauce.
Eggs
Consuming eggs is a highly important part of the keto diet, and can be eaten on their own or used to make other food.
Scrambled eggs are a great option, and can be served with feta, smoked salmon or avocado.
Nuts and berries
Berries and nuts are a good source of protein, and can be an easy switch for those looking to avoid snacking a lot.
Michael Mosley also explained that it helps which time of day a person eats a a high-protein meal.
He said to GHP: "It is well known that moderately increasing the amount of protein in your diet can help you to feel more satisfied after meals. What is less well known, though, is that the time of day that you eat protein also matters.
"To deliver enough protein to make the difference, breakfast doesn’t have to be meaty – nuts and seeds are good sources of protein, as are eggs, dairy and quinoa-based foods."
Spinach
The diet expert has even said that certain vegetables can be counted as 'free food', like spinach, kale or broccoli.
Mosley said: "To deliver enough protein to make the difference, breakfast doesn’t have to be meaty – nuts and seeds are good sources of protein, as are eggs, dairy and quinoa-based foods."
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