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<p>Probiotics are increasingly recognized for their role in metabolic and musculoskeletal health, yet evidence from human clinical trials in healthy populations remains limited. To evaluate the effects of <i>Lacticaseibacillus paracasei</i> NB23 supplementation on insulin-like growth factor-1 (IGF-1), muscle function, and cardiometabolic markers in healthy adults, in a 12-week, double-blind, randomized controlled trial, healthy participants were allocated to receive either NB23 (3&#xa0;g, 5 × 10<sup>10</sup>&#xa0;CFU, twice daily) or placebo. Anthropometric data, muscle strength, and blood biomarkers were collected at baseline and post-intervention. Analyses included blood pressure, lipid profiles, insulin resistance (HOMA-IR), inflammatory cytokines, and IGF-1 pathway markers (PI3K, Akt, p-mTOR). NB23 supplementation resulted in significant improvements in systolic and diastolic blood pressure, LDL/HDL ratio, HOMA-IR, and inflammatory cytokines (IL-6, TNF-α), despite increased caloric intake. Muscle mass and lower-limb strength increased, along with elevated IGF-1 and downstream signaling pathway activation. NB23 improved multiple markers of metabolic and muscle health in a healthy adult cohort. These findings support its potential as a functional food component for cardiometabolic resilience and muscle maintenance. Further studies are warranted to explore its long-term benefits in broader populations.&#xa0;</p>

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The Effects of Lactobacillus paracasei NB23 on IGF-1, Muscle Function, and Cardiometabolic Risk Factors in Healthy Individuals: A Randomized Controlled Trial

  • 期刊论文

  • 发表日期：

    2025年7月1日

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  • Su‑Wen Lin,
  • Wang-Sheng Ko,
  • Fang-Chuan Kuo,
  • Hsueh-Fang Wang

摘要

Probiotics are increasingly recognized for their role in metabolic and musculoskeletal health, yet evidence from human clinical trials in healthy populations remains limited. To evaluate the effects of Lacticaseibacillus paracasei NB23 supplementation on insulin-like growth factor-1 (IGF-1), muscle function, and cardiometabolic markers in healthy adults, in a 12-week, double-blind, randomized controlled trial, healthy participants were allocated to receive either NB23 (3 g, 5 × 1010 CFU, twice daily) or placebo. Anthropometric data, muscle strength, and blood biomarkers were collected at baseline and post-intervention. Analyses included blood pressure, lipid profiles, insulin resistance (HOMA-IR), inflammatory cytokines, and IGF-1 pathway markers (PI3K, Akt, p-mTOR). NB23 supplementation resulted in significant improvements in systolic and diastolic blood pressure, LDL/HDL ratio, HOMA-IR, and inflammatory cytokines (IL-6, TNF-α), despite increased caloric intake. Muscle mass and lower-limb strength increased, along with elevated IGF-1 and downstream signaling pathway activation. NB23 improved multiple markers of metabolic and muscle health in a healthy adult cohort. These findings support its potential as a functional food component for cardiometabolic resilience and muscle maintenance. Further studies are warranted to explore its long-term benefits in broader populations.