Melania Trump eats the same meal every single day

While Donald Trump has made history by becoming the oldest person to be sworn into office as US President, his diet is that of a much younger man.

The 78-year-old is well-known for his fast food diet, chomping down on McDonalds on Air Force One and guzzling up to 12 Diet Cokes every day.

But his wife, Melania Trump, takes a different, far healthier, approach when it comes to nutrition.

The First Lady is said to enjoy a diet that is 'fresh and organic,' and aims to eat at least seven portions of fruit per day.

She also practices strict portion control and only indulges in less healthy treats - ice cream and dark chocolate are her favourites - every now and then.

And, there's one thing she has every single day.

In a Facebook post, Melania shared the recipe for the 'every day delicious and healthy breakfast' she swears by.

The smoothie consists of 'spinach, celery, carrots, blueberries, apple, orange juice, lemon juice, fat-free yogurt, olive oil, flax seeds, omega-3, [and] vitamin D,' and is packed with nutritional benefits.

Melania Trump at her husband's inauguration (Greg Nash-Pool/Getty Images)

Blueberries and spinach are both great sources of antioxidants - which protect cells from damage caused by free radicals and decrease inflammation - as are carrots, which also contain fibre, vitamin A and potassium.

Flaxseed infuses the smoothie with omega-3, supporting the function of cells throughout the body, and also contains an extra boost of antioxidants and fibre.

And, while adding olive oil to your morning smoothie might seem strange, the ingredient is once again packed with antioxidants and other anti-inflammatory properties.

The breakfast smoothie is packed with antioxidants and other nutritional benefits (Getty Stock Image)

It's pretty much the opposite approach to nutrition to her husband, who has even made a point of serving fast food at official events.

At a 2019 White House event during his first term as President for the North Dakota State Bison college football team, Trump stated: "We could have had chefs, we could have, but we got fast food because you know what, I know you people very well."

Meanwhile, Melania's smoothie recipe has gone down a storm with her fans.

One wrote in the Facebook post's comments: "Thank you so much; It won't make me as beautiful as you, but I hope it will help some."

Another said: "You are a sweetheart!! Thanks for the recipe!!"

And a third commented: "I made this smoothie. It was great. Except I used frozen spinach cubes. Delicious."