We all know how harmful refined sugar is to our health, and we even often call it "white death." However, scientists warn that fructose is not only unsafe, but may even be significantly more harmful.
Consumption of foods and beverages sweetened with frucose, not glucose, bring into our body carbohydrates exceeding the recommended daily doses.
A number of studies have shown that fructose lowers insulin sensitivity in the body and affects fat metabolism. All these changes increase the cardiovascular risk.
Studies show that both glucose and fructose, which make up about 25% of your daily caloric intake, lead to identical weight gain.
It has been found that when consuming fructose, fats are deposited mainly around the internal organs and less in the subcutaneous layers - the so-called. visceral obesity. The reason for this type of obesity is the change in the lipid profile and the body's resistance to insulin. These features, which are also part of the metabolic syndrome, certainly worsen the risk of the heart, but little is known about its condition in the long run.
According to the rectors, the intake of large amounts of fructose in combination with high-calorie and high-fat foods can lead to leptin resistance.
Leptin is a hormone that plays a key role in maintaining the balance between food intake and energy needs of the body.
Studies have shown that the loss of its function can lead to the accumulation of extra pounds with excessive intake of fats and carbohydrates.
Fructose is normally found in fruits. According to experts, fructose in plants can not cause leptin resistance in healthy people, regardless of the amount of fruit we eat.
It is worrying that most of the products on the market are extremely high in fructose.
American scientists from the University of Florida have conducted an experimental study on rodents. Laboratory mice were divided into two groups and fed two types of food - with and without fructose.
After six months of follow-up, the team found no differences in body weight or amount of fat, nor in leptin, blood sugar or cholesterol levels.
There was only one difference - the high content of fructose increases the level of triglycerides.
This leads doctors to believe that leptin resistance develops slowly, unnoticed, and for this reason is often overlooked. Hormone resistance has been linked to obesity and the lack of overweight has surprised scientists.
After some of the mice developed resistance to leptin, they were found to gain weight rapidly and accumulate more fat around their organs.