Losing weight isn’t easy. It takes a lot of consistent effort in many areas — exercise, food choices, portion control, sleep, self-esteem are just a few — to do it the safe and right way.

Sadly, life often gets in the way and not every weight loss effort goes as planned. Sometimes, this can lead to weight cycling, better known as yo-yo dieting.

Although there’s no general consensus among medical experts whether repeatedly losing and regaining weight is bad, there are health consequences associated with yo-yo dieting, like coronary issues, extra stress and a slower metabolism.

A recent series of tests by a team of Israeli researchers pinpointed a potential cause for yo-yo dieting in a study appearing in Nature: A gut microbiome that changes when weight is lost, then exposed to high-fat foods again.

The experiments

As scientists studied mice, they discovered an important constant with yo-yo dieting: After one cycle of gaining and losing weight, every bodily system in their test subjects reverted to normal except for their microbiomes. For some six months after their weight loss, mice retained an “obese” microbiome.

“This persistent microbiome accelerated the regaining of weight when the mice were put back on a high-calorie diet or ate regular food in excessive amounts,” said lead researcher Dr. Eran Elinav of the Weizman Institute of Science in a press release.

No surprise, when researchers transplanted gut bacteria from obese mice into germ-free mice, they began to gain weight too when fed high-fat foods.

It was only when scientists bombarded obese mice with broad-spectrum antibiotics or gave them fecal samples from mice that had never been obese that the cycle stopped.

Those treatments may work for mice, but for humans, antibiotics have been a known enemy of gut health for a very long time and fecal transplants have unintended consequences that may do more harm than good.

However, scientists identified a pair of flavonoids, a diverse family of natural chemicals found in nearly all fruits and vegetables, that were in short supply among obese mice that would improve fat-burning.

When mice were fed flavonoids in their drinking water, their little bodies readjusted and didn’t experience accelerated weight gains, even when fed high-calorie diets.

Targeting the gut

Whether extra flavonoids will work on the guts of humans to prevent yo-yo weight gains is anyone’s guess. However, there’s one critical aspect of gut health that the Israeli study didn’t investigate.

Microbial diversity in the gut plays a vital role in protecting humans from all kinds of health issues, not to mention obesity. Unfortunately, our go-go-go lifestyles can make it difficult to eat at the right times, get enough exercise or follow a consistent sleep schedule.

That’s when taking a quality probiotic made with multiple strains of beneficial bacteria like EndoMune Advanced Probiotic can make a big impact in protecting your health.