Publicado: Jue, Febrero 22, 2018
Salud | Por Gertrudes Rodriquez

There is No Difference Between Low-fat and Low-carb Diets

There is No Difference Between Low-fat and Low-carb Diets

In a face-off between a low-fat and a low-carbohydrate diet, neither reigned supreme. And their success did not appear to be influenced by their genetics or their insulin-response to carbohydrates, a finding that casts doubt on the increasingly popular idea that different diets should be recommended to people based on their DNA makeup or on their tolerance for carbs or fat.

In recent years, the big dietary villain has prominently shifted from fat to carbohydrates, with some studies suggesting high-fat, low-carb diets could be the best way to shave off those pounds and keep healthy. He previously led a smaller study, in 2010, finding that overweight women whose genotype matched their diet lost 13 pounds in a year while those who were mismatched lost just over 4 pounds. "Also, we advised them to diet in a way that didn't make them feel hungry or deprived - otherwise it's hard to maintain the diet in the long run", said Gardner, who is director of nutrition studies at the Stanford Prevention Research Center.

The new Stanford study followed 609 people for one year.

Where did the story come from?

What does this study tell us?

The study was covered reasonably accurately in the United Kingdom media.

Interestingly enough, those who lost the most weight didn't do so by cutting macros.

But a study yesterday found neither approach is better than the other.

What did the research involve?

Both groups achieved a clinically important weight loss of approximately 5% of body weight. Researchers then randomly assigned them to either a low-fat or low-carb diet.

No one diet strategy is consistently better than others for weight loss in the general population, conclude the researchers.

"No sería una sorpresa que el Bayern ganara la Champions" — Robert Lewandowski
El sueño parecía lejos, pero cuando iban pasando los años todo estaba mucho más cerca. Diferencias entre el Bayern y el Madrid: "Son similares".

Following randomization into either an HLF or HLC dietary intervention, participants received 22 sessions over a 12-month period, led by registered dietitian health educators. All participants were encouraged to eat healthily, with plenty of vegetables and fibre, while avoiding sugar and refined grains.

Gardner said he was pleased with the above statistics, given the average fat consumption for the participants before the study was around 87 grams per day, and average carbohydrate intake was about 247 grams. A DNA analysis was performed on each participant to see which versions of the metabolic genes PPARG, ADRB2, and FABP2 they carried. My take is that there's just nothing new in this part of the study.

What were the basic results?

"At the end of the year, people on the low-fat diet lost an average of nearly 12 pounds, compared with about 13 pounds for the low-carb diet". The results exposed variations linked with how the body processes fats or carbs. However, the HLC diet showed significant improvements in HDL cholesterol and triglycerides compared with the HLF group. Both groups reduced their daily calorie intake by an average of about 500 calories.

The only difference between the groups was in lipid levels in the blood.

After the second month, the researchers allowed both groups to progressively increase their carb or fat intake to a sustainable level.

How did the researchers interpret the results?

Gardner said numerous people in the study were surprised - and relieved - that they did not have to restrict or even think about calories. "We really need to focus on that foundational diet, which is more vegetables, more whole foods, less added sugar and less refined grains".

The theory that some diets work better for some people may still hold true - but not for the reasons previously suggested.

After 12 months, the average macronutrient distributions for the HLF and HLC groups were 48% versus 30% for carbs, 21% versus 23% for protein, and 29% versus 45% for fat, respectively. But in fact they did lose 6,500 lbs collectively...

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