Today, weight management has become a national public health priority that can no longer be ignored.
According to the World Health Organization, there are over 1 billion people worldwide living with obesity, including 650 million adults, 340 million adolescents, and 39 million children.
As living standards rise, China is also facing a severe obesity challenge. The latest 2023 report, "Prevalence of Obesity in China and Related Complications: A Real-World Cross-Sectional Study of 15.8 Million Adults," shows that nearly half of Chinese adults are overweight or obese, with 34.8% overweight and 14.1% obese. This alarming trend has prompted government intervention. China's National Health Commission has launched a three-year "Weight Management Program," aiming to significantly improve public awareness and skills related to weight control by 2026 and reduce the annual growth rate of obesity by 10%.
01
Obesity: A High-Risk Warning Signal for Chronic Health Problems
Abnormal weight is a major risk factor for hypertension, diabetes, cardiovascular and cerebrovascular diseases, and fatty liver. Obesity results from a combination of genetic, environmental, metabolic, and behavioral factors, and its cyclical interaction with chronic low-grade inflammation creates a vicious cycle.
A high-fat and unhealthy diet can disrupt the gut microbiota structure and impair the gut barrier. This allows harmful substances produced in the gut-such as lipopolysaccharides (LPS) from intestinal bacteria-to pass through the intestinal wall into the bloodstream and stimulate immune cells. Activated macrophages and other immune cells infiltrate adipose tissue, skeletal muscle, and the liver, triggering inflammation and reducing insulin sensitivity.
Inflammation causes adipocytes to enlarge, and hypertrophic fat cells become hypoxic and stressed, releasing pro-inflammatory cytokines such as TNF-α and IL-6, which further activate macrophage infiltration and worsen inflammatory responses-forming a vicious cycle (as shown in Figure 1).
02
Revealing the Link: Gut Microbiota and Weight Management Are Closely Connected
Traditional theories attribute weight gain to an imbalance between energy intake and expenditure, influenced by individual constitution and genetics. However, recent studies have uncovered the critical role of the gut microbiota in weight regulation.
A well-known experiment using germ-free mice investigated the causal relationship between gut microbiota and weight change. When germ-free mice received transplants of gut microbiota from genetically obese mice and lean mice, respectively, those receiving the "obese microbiota" gained significantly more weight. This demonstrated that gut microbiota alone can alter body weight, providing scientific evidence for using probiotics to manage obesity.
Among the many probiotics associated with weight regulation, Bifidobacterium breve B-3 stands out for its excellent human affinity, safety, and promising anti-obesity potential. Over the past decade, research has clarified the mechanisms by which B-3 supports weight management.
High-fat diets are widely known to induce metabolic endotoxemia, gut barrier dysfunction, and metabolic disorders-all accompanied by shifts in the gut microbial composition. Long-term high-fat intake weakens the gut barrier, allowing bacteria to translocate into the body and trigger chronic inflammation, eventually leading to obesity and metabolic syndrome.
Studies have found that B. breve B-3 can mitigate these high-fat-diet-induced changes, support gut barrier integrity, suppress inflammation, reduce circulating endotoxins, and activate hepatic lipid metabolism. This promotes fat burning, reduces fat accumulation, and positively influences blood glucose and lipid profiles, contributing to improved metabolic health.
03
Bifidobacterium breve B-3: A Science-Backed "Powerful Player" for Weight Reduction
Bifidobacterium breve B-3 is a specialized Human-Residential Bifidobacteria (HRB) strain. Scientists at Morinaga Milk Industry Co., Ltd. of Japan screened nearly 800 bacterial strains based on the links between gut microbiota and obesity and identified B-3 as a superior probiotic for maintaining a healthy weight and improving lifestyle health. Patents across multiple regions, including China, the United States, Japan, and the European Union, protect its anti-obesity function.
Clinical Evidence of Morinaga Bifidobacterium breve B-3
B-3 is supported by an extensive body of clinical research, including five high-quality randomized controlled trials (RCTs). Studies demonstrate that B-3 not only safely and effectively reduces body fat but also reduces body weight, waist circumference, and hip circumference.
In one trial involving 80 adults with a BMI of 25–30 kg/m², participants consumed 20 billion CFU/day. The B-3 group showed significantly lower body fat mass and body fat percentage than the placebo group (P<0.05). Waist circumference was significantly below baseline by week 12 (P<0.01). Interestingly, while body fat decreased, muscle mass tended to increase and was significantly higher than placebo at week 8 (P<0.05), earning B-3 the reputation of a "fat-loss and muscle-support" strain.
A 2023 study involving 83 adults with a BMI of 25–30 kg/m² randomly assigned participants to receive 5 billion CFU/day of B-3 or a placebo for 12 weeks. Results showed that body weight and BMI in the B-3 group were significantly lower than in the placebo group. The B-3 group exhibited a meaningful reduction in body fat mass, while no significant change was observed in the placebo group. After 12 weeks, both waist and hip circumferences in the B-3 group were significantly reduced compared to placebo (as shown in Figure 2).
Applications of Morinaga Bifidobacterium breve B-3
With its superior physiological functions and stability, B-3 is widely used in tablets, capsules, sachets, and powders for fat reduction, slimming, and weight management.
Driven by the rise of healthy snacks, low-fat dairy products, and functional dietary supplements, the market for high-performance probiotics continues to expand. As the trend toward "scientific formulation + precision nutrition" accelerates, B-3 is poised to power a new generation of functional innovations-such as guilt-free anti-obesity chocolates, fat-loss & muscle-gain protein powders, and more. These offerings provide weight-management consumers with safer, healthier, and more diversified options.
04
Looking Ahead: Bifidobacterium breve B-3 Leading a Science-Driven "Smart Slimming" Era
Weight management reflects both the growing health awareness of the population and the urgency of addressing a major public-health challenge.
As people increasingly seek safe, scientific, and sustainable weight-management strategies, probiotics for weight control are gaining widespread attention. Among them, Morinaga's B-3-backed by clinical anti-obesity evidence, multinational patents, and cross-category product potential-offers companies a powerful differentiator while providing overweight individuals with a healthy, non-extreme approach to fat reduction.
In the future, as functional strain research deepens and product innovation accelerates, Bifidobacterium breve B-3 is expected to become a core ingredient in weight-management solutions, driving the industry toward greater precision, personalization, and functional sophistication. Ultimately, it supports the vision of "making fat loss more scientific and making health simpler."
