L. reuteri

A clinical trial found L. reuteri consumption reduced waist circumference by up to 8.5 inches with no dietary change. L. reuteri elevates oxytocin, increases sociability, improves sleep quality, supports muscle recovery, and reduces cortisol. Combining L. reuteri, L. gasseri, and Bacillus subtilis in yogurt form normalizes SIBO breath hydrogen by approximately 90%. L. reuteri directly improves insulin sensitivity and reduces gut pathogens. In humans, L. reuteri consumption is associated with a roughly 50% rise in testosterone in older men. Within weeks of daily L. reuteri yogurt consumption, reported effects include improved sleep, reduced anxiety, and increased social drive. L. reuteri yogurt produces hundreds of billions of CFUs per serving, far exceeding commercial probiotic capsule counts. Delayed-release encapsulation in commercial probiotics is counterproductive for people with SIBO, who need microbial dissolution in the small intestine rather than the colon. The commercial L. reuteri infant tablet dose is too small to produce noticeable effects. An estimated daily target of 40–50 billion CFU or higher is needed for meaningful visceral fat reduction. A South Korean 90-day do…