Two major studies released this week to rekindle discussion of the risks to the cardiovascular system, the high consumption of refined carbohydrates found in white breads and biscuits.
The first study investigated the relationship between infarction and Diets low in saturated fat (already linked to heart problems) but rich in carbohydrates. The researchers, from Denmark, followed 53,644 adults during 12. The research concluded that for every 5% increase in carbohydrate in the diet, there was a 33% greater risk of myocardial infarction. This result was published in the American Journal of Clinical Nutrition.
"Carbohydrates with high glycemic index increase the chances of cardiovascular problems by causing inflammation, dyslipidemia [changes in cholesterol] and dysfunction in the vessel walls," he told Sheet Marianne Jakobsen, nutrition specialist and research leader.
The other paper was published in the Archives of Internal Medicine "and called the risk of disease in the arteries Heart to excessive consumption of refined carbohydrates, but only for women. For men, there were no changes arising from the diet. The study also concludes that the risk of heart disease, it is more the fact that carbohydrate intake be high glycemic index than the total amount of carbohydrates consumed. The researchers followed more than 47 000 volunteers for seven years in Italy.
Foods with high glycemic index are thus called for the ability to quickly increase the levels of blood glucose. With this, the body releases high doses of insulin, causing glucose to fall rapidly and leading to an early sensation of hunger.
For Daniel Magnoni, nutrition specialist and a cardiologist at the Heart Hospital, the habit of consuming excess carbohydrates with high glycemic index overloads and damages the pancreas, the organ responsible for insulin production, and can lead to obesity. "The causes of heart disease are many, and this may be a risk factor," said Magnoni.
To preserve the pancreas, it is best to feed nutrients to the most complex, are slow to be absorbed. "Over 5,000 years ago, you would not eat refined sugar. This kind of diet is which leads to diseases of modern society. "
Increasing obesity in the U.S. is an example of what happens when you exchange saturated fats, which contribute to the increase in" bad "cholesterol, carbohydrates, says cardiologist Raul Dias dos Santos, director of Cardiology Society of São Paulo: "There was a significant reduction of cholesterol in the population in recent years, but sharp rise in obesity and other associated problems."
Doctors recommend that the daily diet is composed of 60% carbohydrates, preferably low glycemic index, and by 7% saturated fat.
Por serem digeridos rapidamente, os produtos com alto índice glicêmico levam a uma maior ingestão de calorias e consequente ganho de peso. A gordura acumulada pode liberar maior quantidade de ácidos graxos, que se alojam no fígado. Esse cenário pode piorar os índices do colesterol "ruim" e aumentar as taxas de açúcar no sangue (o organismo desenvolve resistência à insulina).
O tecido adiposo no abdômen também estimula processos inflamatórios nos vasos sanguíneos, favorecendo a formação de placas nas paredes.
Pesquisas anteriores já associaram o maior consumo de carboidratos refinados ao aumento nos índices triglycerides in the blood - another marker of cardiovascular risk.
Women with high levels of triglycerides have twice the risk of heart disease than men.
collaborated Deborah Mismetti
Jullian SILVEIRA
Report of Local
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