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2018/07/06

Low-fat or Low-carb?

All volunteers are reduced more than 5 kg after one year.

In a long-term study, the scientists found both low-fat or low-carb diets (reduction in carbohydrates) and low-fat (fat loss) all show the same loss weight efficiency. This happens regardless of genetic tests suggest volunteers should follow one of the two modes to have better performance.

Research conducted by Stanford University has lost the hope of some biologists, those who want to exploit the genetic information, in order to design personalized diets up for each person.
Previously, there have been a number of studies support this idea, When scientists find out some specific signs in gen, related to the process of metabolism. This likely explains why some people lose weight easily while others struggled with a similar diet.

The biotechnology company has even started offering the type of DNA testing in order to help people adjust the menu according to their genetic markers in order to achieve the purpose of losing weight more efficiently
Low-fat or Low-carb ?  Dieting the traditional or modern for the same results

Design of experiments

The research was led by nutritionist Christopher Gardner. In it, he and his colleagues have recruited 609 participants. They are the people who are overweight and obese from 18 to 50 years old,  have a BMI in the range of 28 to 40. The average weight of a group of volunteers is about 96kg.

The scientists randomly divided them into two groups. The first group comprises 305 people were assigned to eat low-fat mode. The second group consists of the remaining 304 will eat low-carb.

This experiment lasted for 1 year. However, volunteers are not being monitored or tightly bound to a rigid diet this helps to create a research environment in it, eating patterns of volunteers become more natural and real, the volunteers are invited to attend nutrition classes lasted with 2 syllabi designed specifically for 2 group. Here, the experienced dietitian will guide them to eat right according to his group's test without feeling forced. Volunteers will also have knowledge of, and receive tips on nutrition and healthy eating in general.

For example, the Group ate low-fat are the experts recommended to avoid oil, fatty meat, powdered milk, and nuts. Meanwhile, the low-carb group was warned to avoid eating whole grains, starchy vegetables, and beans.

However, both groups will get the General advice: (1) maximizes the number of vegetables eaten in, (2) reduce the amount of sugar, starch, and fat metabolism, (3) focus on pure foods that are processed to a minimum nutrient-rich, and best to cook at home, whenever possible.

Nutrition experts also reinforce their morale -This can avoid the psychological effects are not good when dieting, eg stress and for them, the tips can help to diet more comfortable and pleasant
On the other hand, the volunteers also must still be assigned to the common goal. Such members of the low-carb group must try to eat just 20 grams of carb per day, lasted for the first eight weeks.

Similarly, people who eat low-fat also have to reduce the amount of fat consumed daily down to 20 grams in the first eight weeks. Then, both groups were instructed to search out the lowest fat and carb levels that they can maintain almost forever.
Low-fat or Low-carb? Dieting the traditional or modern for the same results

Results:

The survey results showed that both groups have cut the carb and fat. But on average, they do not hold his goals. Before starting the experiment, people who eat low-carb reported they ate on average 246.5 grams carb per day. After completing 8 weeks reduced carb down to 20 grams/day, they have increased the amount of carb up 97 grams/day in the third month and increase to 132 grams at the time of the end of the experiment.

Similarly, people who eat low-fat consumption averaged 87 grams of fat each day at the starting point. They were reduced to 20 grams in 8 weeks required, but increasing numbers up to 42 grams after three months and reached 57 grams of fat each day at the time of the final test. Although the researchers did not recommend the volunteers count or cutting calories both groups have steadily decreased from 500 to 600 kcal per day consumption throughout the research process.

The end result is: each volunteer in the group eating low-carb has dropped an average of 13.2-pound (5.99 kg). Meanwhile, the group is low-fat reduction on average 11.7 pounds (5.3 kilograms) per person. The difference between the two groups of scientists is said to have no statistical significance.

The researchers checked the data again to see those with genotype each suit there weight loss diets more efficiently when they eat their mode properly? But the result is no surprise. The researchers also collected data on insulin hormones from participants, to see if it could predict the outcome of dieting.
But the result was not. The secretion of insulin is not related to the weight loss results better or worse is to gain weight back. Overall, the researchers concluded the differences in genetics or the insulin tests are not "useful in determining a better diet for everyone".
Genetic testing or insulin may not be helpful in determining personalized diets
 Also, have to say, this research still has the limitations. Although the scale of large samples and random, and again based largely on self-reported information from the participants, and they do not comply with the strict menu.

This mimics what happens with dieters in real terms, when they have been very trying and resolve to lose weight, but not always succeed in complying with the plan by themselves.

Currently, the researchers are continuing selective genetic data left over from the participants, to see if there are any other gene segments can help explain the weight of them or not.

Arstechnica