'Guarantee you'll lose belly!' Best high-protein food 'breaks down' fat and 'keeps you feeling full'

Dr Eric Berg DC explained why slimmers should be incorporating eggs into their diet. He said: "Eggs have virtually no carbohydrates, which means they won't stimulate insulin.

"When a protein is low-carb, it triggers the opposing hormone to insulin - glucagon - and glucagon helps you burn fat."

He added that eggs are "the best source of protein", regarded as "the highest quality protein you can consume".

The weight loss expert added that eggs are high in lecithin, which "breaks down fat" in the liver.

Dr Michael Mosley, founder of The Fast 800 diet, is also a major advocate for eating eggs.

The official website for The Fast 800 recommends "starting the day with eggs".

Dr Eric Berg's best foods for busting belly fat

1. Eggs
2. Salmon
3. Sauerkraut
4. Cruciferous vegetables
5. Hamburger (minus the bun and side of chips)
6. Avocado
7. Broccoli sprouts
8. Asparagus

It reads: "Boiled, poached, scrambled or as an omelette – they’ll keep you feeling fuller for longer compared to cereal or toast. Delicious with greens and parmesan or smoked salmon and a sprinkle of chilli."

Egg Info said: "Eggs have a useful role to play in a healthy balanced diet for weight loss. Eggs are relatively low in calories - there are 66 calories in a medium-sized egg - and are nutrient-dense, providing high-quality protein as well as a range of vitamins and minerals."

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Dr Eric Berg said that salmon is another fat-torching food. He explained that this oily fish is high in omega-3 fatty acids, which helps reduce insulin and cortisol.

According to a study published in the National Library of Medicine, "continuous high insulin levels are associated with weight gain and lead to cardiometabolic diseases".

Another study published in the National Library of Medicine said that "patients with abdominal obesity have elevated cortisol levels".

Like eggs and salmon, fruit is widely understood as healthy, weight-loss-friendly food, but according to a doctor of naturopathic medicine, one particular variety comes out on top.

The best fruit for weight loss "increases fat burning", lowers cholesterol and targets your midriff.