Whole grains may increase metabolism and calorie loss

The findings, released in the American Journal of Clinical Nutrition, suggest that eating whole grains is connected with an increase in calorie loss because it boosts metabolism and reduces the amount of calories that are retained during digestion.

The study had one caveat: it did not compare the grain eaters to a group that avoided grains completely, according to Ashton.

"'We don't know over the long term if it would translate to weight loss", Karl said, but his team suspects it would. But, it is reasonable to believe that people who work out tend to eat whole grains. Both studies are published online February 8 in the American Journal of Clinical Nutrition. During the first two weeks, all participants followed the same Western-style diet rich in refined grains. After an initial period of two weeks where all participants were given the same foods, the researchers fed some of the participants a diet with whole grains and some a diet with refined grains. However, it had not been established as to whether they could help in controlling one's weight-until now: the new study provides insight into how whole grains can assist in the management of one's weight. Eating whole grains resulted in an increase in levels of memory T cells, while eating refined grains resulted in a decrease in TNF-alpha production when immune cells were stimulated with compounds such as those found in bacterial wall.

Phil Karl, who led the study, said: "Many previous studies have suggested benefits of whole grains and dietary fibre on chronic disease risk". The team of researchers has analyzed the outcomes after a controlled trial which lasted eight weeks and had 81 participants. However, there has been a certain degree of controversy regarding the effect of whole grains and fiber on weight, mostly due to the fact that there isn't a lot of data available from metabolic studies. At the end of the study, those who ate whole grains had an increase in resting metabolic rate and fecal energy losses compared to those who ate refined grains. Furthermore, the increases in fecal energy losses were not because of the extra fiber, but from the effect of the fiber on the digestibility of other food calories. This included measuring each person's weight, blood glucose, their metabolic rate, fullness, hunger and even fecal calories. "Basically, that's the difference, you're getting fiber and nutrients in whole grains".

Grains are a major food group that include wheat, rice, oats and barley products. The recommended daily allowance of whole grains is a minimum of three ounces of whole grains for women and four ounces for men. While whole grains contain the whole-grain kernel and include brown rice, oatmeal, and whole-wheat flour, refined grains are starches that are processed and milled to remove the bran and germ to prolong their shelf life.

Whole grains have their outer covering intact.

  • Leroy Wright


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