Written by Hrefna Palsdottir, multiple sclerosis — medically reviewed by Adrienne Seitz, MS, RD, LDN, Nutrition — updated on November 20, 2020

Probiotics are live microbe that have actually health services when eaten (1).

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They’re uncovered in both supplements and fermented foods.

Probiotics may enhance your immune role and digestive and heart health, among other benefits (2, 3, 4, 5, 6, 7).

Several studies likewise suggest that probiotics can aid you lose weight and belly fat.

Hundreds of microbe reside in your digestive system.

The majority of these are friendly bacteria that develop several important nutrients, consisting of vitamin K and certain B vitamins.

They also help malfunction fiber, which your body can’t digest, turning it into helpful short-chain fat acids like butyrate (8).

There are two main households of great bacteria in the gut: bacteroidetes and firmicutes. Human body weight seems to be pertained to the balance of these two households of bacteria (9, 10).

Both human and also animal studies have uncovered that moderate-weight civilization have various gut bacteria than those through overweight or obesity (11, 12, 13, 14).

In the majority of those studies, world with weight problems had an ext firmicutes and fewer bacteroidetes, contrasted with moderate-weight people.

However, numerous studies have failed to find a connection between the firmicutes-to-bacteroidetes ratio and obesity (15).

People with excessive weight tend to have less varied gut bacteria 보다 lean people. What’s more, those with excessive weight who have less varied gut bacteria often tend to gain more weight than civilization with weight problems who have much more diverse gut bacteria (11, 16).

Some pet studies additionally show that as soon as gut bacteria from mouse with obesity were transplanted right into the organs of lean mice, the skinny mice arisen obesity (17).


Studies imply that gut bacteria might play a powerful role in body weight regulation.

How probiotics influence body weight

The methods through which probiotics influence body weight and belly fat aren’t yet well understood.

Probiotics seem to affect appetite and energy intake via the manufacturing of acetate, propionate, and butyrate, which are short-chain fatty acids (12, 13).

It’s assumed that details probiotics might inhibit the absorb of dietary fat, raising the quantity of fat excreted through feces (18).

In other words, they make your body “harvest” fewer calories indigenous the foodstuffs you eat.

Certain bacteria, such together those from the Lactobacillus family, have been discovered to role in this means (18).

Probiotics may also fight excessive weight in other ways, including:

Strong evidence links weight problems to inflammation throughout the body. By boosting the wellness of her gut lining, probiotics might reduce systemic inflammation and also protect against obesity and also other conditions (23, 24, 25, 26, 27)

More research study is necessary to totally understand these mechanisms.


Probiotics may reduce the number of calories you absorb from food. They also influence levels the hormones and also proteins pertained to appetite and fat storage, and also potentially reduce inflammation, which deserve to drive obesity.

A current review of well-designed researches on probiotics and also weight lose in people with overweight and also obesity suggests that probiotics can help you shed weight and lower your body fat percentage (28).

In particular, researches have discovered that certain strains the the Lactobacillus family can aid you shed weight and belly fat.

In one study, eating yogurt through Lactobacillus fermentum or Lactobacillus amylovorus diminished body fat by 3–4% end 6 mainly (29).

Another examine of 125 overweight dieters investigated the effects of Lactobacillus rhamnosus additional on load loss and weight maintenance (30).

Women acquisition the probiotics lost 50% much more weight end 3 months, contrasted with those taking a placebo pill. They likewise continued to lose weight throughout the weight maintain phase that the study.

In one well-designed study, 114 adults with excessive weight were offered either the probiotic Lactobacillus sakei or a placebo for 12 weeks. Those taking the probiotic experienced significant decreases in both body fat mass and also waist one (31).

Lactobacillus gasseri

Of all the probiotic bacteria studied to date, Lactobacillus gasseri reflects some that the most promising impacts on load loss. Plenty of studies in rodents have found that it has actually anti-obesity effects (32, 33, 34, 35, 36).

Additionally, researches in adult have displayed promising results (18, 37, 38, 39).

One study that followed 210 human being with significant amounts of belly fat discovered that acquisition Lactobacillus gasseri because that 12 weeks diminished body weight, fat roughly organs, body mass index (BMI), waist size, and hip circumference.

What’s more, belly fat was diminished by 8.5%. However, when participants quit taking the probiotic, castle gained ago all that the belly fat within 1 month (38).

Other strains

Other strains the probiotics might also aid reduce weight and belly fat.

In an 8-week study, women with overweight or obesity took either a probiotic that had strains that both Lactobacillus and also Bifidobacterium or a placebo, together with following a dietary intervention.

Those spend the probiotic lost significantly much more belly fat 보다 those acquisition a placebo (40).

Another research in 135 civilization with far-ranging amounts of ship fat discovered those who took Bifidobacterium animalis subsp. lactis daily for 3 months shed significantly much more belly fat and also had reduced BMI and waist circumference, contrasted with those acquisition a placebo.

These outcomes were particularly pronounced in ladies (41).


Several strains of probiotics in both the Lactobacillus and Bifidobacterium family have been presented to minimize weight and belly fat. Lactobacillus gasseri appears to be one of the most effective.

Losing load is no the only method to hit obesity. Preventing unwanted weight gain in the first place might be even more valuable in preventing obesity.

In one 4-week study, acquisition a probiotic formulation dubbed VSL#3 lessened weight gain and fat get in civilization following a diet that listed 1,000 extra calories 보다 they essential per work (42).

Those in the probiotic group got less fat, although they didn’t experience any significant changes in insulin sensitivity or metabolism.

This indicates that part probiotic strains could prevent weight acquire in the context of a high calorie diet. However, this needs to be learned further.


Certain probiotic strains may be able to reduce weight gain in civilization following a high calorie diet.

Not all studies have found that probiotics aid weight loss.

Some researches have discovered that details probiotic strains could lead come weight get — no weight loss.

One current review found that probiotics’ impacts on body weight rely on which species and strains space used. For instance, while one strain of Lactobacillus gasseri lessened weight gain compared with a control, one more strain advocated weight acquire (43).


Not every probiotics help weight loss, and also some might even reason weight gain. The impacts depend top top the probiotic strain and may differ by individual.

Probiotics sell a wide range of health benefits.

However, their results on weight room mixed and seem to rely on the form of probiotic.

Evidence suggests that Lactobacillus gasseri may assist people through obesity shed weight and also belly fat. Additionally, a probiotic complement blend referred to as VSL#3 might reduce weight gain in those ~ above a high calorie diet.

At the finish of the day, certain varieties of probiotics may have actually modest effects on her weight, particularly when merged with a healthy, whole-foods diet.

Nevertheless, over there are numerous other reasons to take a probiotic supplement.

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They have the right to improve your digestive health and also cardiovascular hazard factors, mitigate inflammation, and also even assist fight depression and also anxiety.