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Bifidobacterium lactis 420 is a proprietary probiotic strain of the species Bifidobacterium animalis subsp. lactis that has been clinically studied for its effects on weight management and metabolic health. It is believed to support body weight regulation by modulating the gut microbiome and improving intestinal barrier integrity[1][2][4]. Clinical trials have shown that supplementation with this strain can help reduce body fat mass, body weight, waist circumference, and calorie intake in overweight individuals[1][4]. Mechanistically, it may increase levels of Akkermansia muciniphila (a beneficial gut bacterium associated with leanness), reduce markers of inflammation and dysbiosis in the gut mucosa[1][2][4], and improve glucose metabolism—potentially via increased GLP-1 secretion involved in insulin release and satiety signaling[4]. The strain survives gastrointestinal passage and adheres well to human colonic mucus[2].
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