Postbiotic LP-2998 — The Muscle-Preserving Postbiotic
Postbiotic LP-2998 is a heat-killed preparation of the lactic acid bacterium *Lactobacillus curvatus* CP2998, investigated for its potential to combat age-related muscle loss. By modulating the gut-muscle axis and suppressing protein degradation pathways, it offers a promising, shelf-stable intervention for preserving skeletal muscle mass and physical function during aging.
Mechanism of Action
Postbiotic LP-2998 (heat-killed Lactobacillus curvatus CP2998) exerts its effects primarily through the gut-muscle axis. In preclinical models, it has been shown to prevent glucocorticoid-induced muscle atrophy by suppressing the activation of the glucocorticoid receptor. This suppression downregulates the expression of muscle-specific ubiquitin ligases, such as MuRF1 and MAFbx (atrogin-1), which are key drivers of protein degradation in the ubiquitin-proteasome system. Additionally, its unique lipoteichoic acid structure may interact with host immune receptors to modulate systemic inflammation, a known contributor to age-related sarcopenia.
Human Trial Evidence
Human evidence for Postbiotic LP-2998 is emerging but limited. A placebo-controlled, randomized, double-blind, parallel-group study in older adults investigated the effects of heat-killed Lactobacillus curvatus CP2998 administration on physical function, body composition, and health-related quality of life, suggesting potential benefits for physical function in aging populations. However, large-scale, multi-center human longevity trials are currently lacking.
Dosing Protocol
The optimal dosing for Postbiotic LP-2998 (heat-killed Lactobacillus curvatus CP2998) in humans is not yet firmly established in standard clinical practice. In clinical trials evaluating its effects on physical function in older adults, specific daily dosages of the heat-killed preparation were administered, typically as a daily oral supplement. Since it is a postbiotic (heat-killed), it does not require refrigeration and is dosed by cell count or weight rather than colony-forming units (CFUs).
Safety & Contraindications
Postbiotic LP-2998 is generally considered safe and well-tolerated, as it is a heat-killed preparation of a food-derived lactic acid bacterium, eliminating the risk of opportunistic infection or bacterial translocation. No severe adverse effects have been reported in existing human trials. However, long-term safety data in diverse populations are still needed. Individuals with severe gastrointestinal disorders or those on immunosuppressive therapy should consult a healthcare provider before use.
Key Papers
Effects of administration of Lactobacillus curvatus CP2998 on physical function in the older adults - A placebo-controlled, randomized, double-blind, parallel-group study
Japanese Pharmacology & Therapeutics · 2019
Lactobacillus curvatus CP2998 Prevents Dexamethasone-Induced Muscle Atrophy in C2C12 Myotubes
Journal of Nutritional Science and Vitaminology · 2019