Surf or turf? Scientists wrestle with the protein question (again)

Natural Health News – We all have to eat, but that does not mean understanding that nutrition is easy. The topic of protein – the amount and type – is a good example

Two new studies suggest that not all sources of dietary protein are the same and that the benefits of healthy sources. protein are much more complex than we think.

In the first study, California researchers followed a large sample of adults for nearly two decades. They found that eating a diet rich in animal protein in midlife makes you four times more likely to die of cancer than a person with a low-protein diet. In fact, the effect was comparable to the consumption of snuff.

Not only the excessive consumption of proteins linked to a dramatic increase in cancer mortality, but middle-aged people who consume large amounts of animal protein – including meat, milk and cheese – are also more susceptible to premature death in general, the study in the journal Cell Metabolism .

Fundamentally, the researchers found that the protein of plant origin, such as soybean, do not seem to have the same effects on mortality as animal protein. Nor do they seem cancer rates and death to be affected by controlling carbohydrates or fat intake, suggesting that animal protein is the main culprit.

Before this study, says Valter Longo corresponding author, Professor Edna M. Jones Biogerontology the University of Southern California (USC) Davis School of Gerontology, research had never shown a definite correlation between the high protein intake and risk of mortality. However, many studies have shown a correlation between high consumption of animal products (and a corresponding low intake of fruits and vegetables), and diseases such as cancer, diabetes and heart disease .

needs change

More interesting than the sensationalist headlines claiming that meat is as harmful as smoking were some of the subtleties of the study.

For example, instead of looking to adulthood as a monolithic phase of life, Longo and his colleagues looked at how changes in biology with age, and how are taken in half-life can play out throughout human life.

In other words, what is good for you in a year may be harmful in another. Proteins, for example, controls the growth hormone IGF-I, which helps the growth of our bodies. However, IGF-I levels have also been linked with susceptibility to cancer. The levels of this growth hormone decrease dramatically after age 65, leading to brittleness and the potential loss of muscle mass. The study found that while high protein intake during middle age is very damaging, which is protective for older adults :. Those over 65 who ate moderate or high protein diet were less susceptible to the disease

“Most Americans are eating almost twice as much protein as they should, and it seems that the best change would be to reduce daily intake of all proteins, but especially animal proteins derived origin, “Longo said. “But it is not extreme to cut and separate the protein;. You can spend protected malnourished very quickly”

The World Wide Fund for Cancer Research (WCRF), which has conducted a comprehensive study on consumption red meat, recommends no more than 500 g (1 lb) cooked meat a week .

One fish, two fish

Unlike red meat and canned fish is generally considered a good source of healthy protein. Bluefish also long been known to be beneficial for heart health. However, the exact mechanisms by which fats and other useful nutrients found in the work of fish in the human body are not fully known.

In a second study, much smaller, published in PLOS ONE , Finnish researchers found that increased intake of fatty fish 3-4 meals a week increased the number of large HDL particles. Large HDL particles is believed to protect against cardiovascular disease.

Population studies have shown that HDL cholesterol – known as the “good” cholesterol because it is less easily oxidized and therefore is less likely to cause damage to tissues and arteries – and in particular, large HDL particles are efficient in additional sweep cholesterol from arterial walls. Large HDL particles have been associated with a lower risk of cardiovascular disease, whereas small HDL particles may even have the opposite effect.

In this study, participants ate a 100-150g (3-5 ounces) serving of fatty fish such as salmon, rainbow trout, herring and vendace. No butter or cream added was used in the preparation of fish. In general, a higher intake of fish increased the number of large HDL particles and lipids contained therein.

Traditionally, cholesterol is divided into “bad” LDL cholesterol and “good” HDL cholesterol, but the technology used in this study allows investigating a total of 14 different kinds of particles – suggesting that ” bad “simplistic and ‘good’ label can prevent a deeper understanding of healthy eating.

The researchers emphasize that a dietary approach to the treatment of the total increase and LDL cholesterol levels is important.

Its findings – which also showed that the intake of whole grains and cranberries tipped the scales toward large particles of HDL – are very much in line with most recommendations of healthy eating to encourage a reduction in consumption red meat and increased consumption of fish and other marine products, along with fresh produce and whole grains.

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