After pregnancy, the most commonly used probiotics might help women better control belly fat, according to WebMD.

In a study from Finland, the probiotics lactobacillus and bifidobacterium were found to decrease central obesity - a body mass index of 30 or more and waist size of more than 31.5 inches.

Only 25% of women who received daily probiotic capsules, plus dietary advice, had central obesity following pregnancy, WebMD reports. That compared to 43% of women given dietary counseling alone.

Studies suggest probiotics improve digestion, support gut health and strengthen the immune system. A good probiotic supplement should contain 3 billion or more "friendly bacteria."