A recent study revealed a dietary system called "Longevity Diet" that may increase natural satiety hormone levels in the body, reduce fat, and improve metabolic health indicators, potentially supporting better health with aging.

According to the American New York Post, the researchers explained that the diet was designed to achieve two main goals: extending healthspan and reducing physical frailty, while avoiding some side effects associated with weight-loss drugs, such as digestive disorders and muscle mass loss, which may increase the risk of falls and fractures.

"Longevity Diet" was based on the Mediterranean diet, with its components modified to contain low amounts of amino acids, a high proportion of carbohydrates, and a moderate to high amount of healthy fats, along with the addition of an essential nutrient: methionine, an essential amino acid.

The researchers compared the effect of "Longevity Diet" on mice with a traditional Western diet rich in sugars and processed fats, and a ketogenic diet rich in unsaturated fats and low in carbohydrates.

The results showed that the methionine-supplemented diet was the most effective in reducing fat mass, decreasing signs of frailty, improving cardiac and metabolic markers, and increasing levels of natural satiety hormone, as well as raising levels of another hormone associated with fat burning and improving insulin sensitivity.

In contrast, the ketogenic and Western diets led to increased fat mass and frailty, as well as elevated cholesterol levels or insulin resistance.

The researchers indicated that methionine is essential for tissue repair, metabolism, and detoxification, and has also been shown to extend lifespan in animals, improve inflammation, and support bone health.

Methionine is an essential amino acid that the body cannot produce by itself; therefore it must be obtained through diet.

Its main sources include:

* Eggs

* Walnuts

* Fish such as salmon and tuna

* Chicken

* Red meat

* Sesame seeds

According to the Cleveland Clinic, it is recommended to consume about 19 milligrams of methionine per kilogram of body weight.