Samyang Roundsquare has launched Spindle, a new metabolic health brand centred on what it calls the gut–muscle connection, introducing its first product, Spindle Muscle+, as a pasteurized postbiotic designed to support muscle function through the gut. The company says the formulation is powered by Akkermansia MYO™, a non-live preparation derived from the microbe Akkermansia muciniphila, and positions the product as a science-led alternative to traditional protein- or amino acid–based supplements.
A shift from protein-only thinking
For decades, muscle maintenance advice has leaned on two pillars: resistance training and protein intake. Samyang Roundsquare argues that this picture is incomplete, pointing to studies that link the intestinal ecosystem to muscle protein synthesis, systemic inflammation and physical function. The company frames the gut as a regulatory hub that can influence how muscle is built and preserved across the lifespan, and says Spindle Muscle+ is the first postbiotic explicitly developed to target this gut–muscle axis.
“Maintaining muscle strength over time depends on more than protein and staying active alone,” said Faissal Tahiri, Head of Healthcare, Samyang America. “With Spindle, we are bringing forward a science-led approach that looks at the biological systems influencing muscle function, including the growing scientific understanding of the gut–muscle connection.”
What Akkermansia MYO™ is—and is not
At the core of the product is Akkermansia MYO™, described as a pasteurized, non-live postbiotic derived from A. muciniphila, a bacterium that has been extensively studied for roles in gut barrier integrity and metabolic health. The company underscores that levels of Akkermansia decline with age, positioning its ingredient as a way to engage with that biology without introducing live microbes.
- Form: Pasteurized (non-live) postbiotic ingredient
- Source: Derived from Akkermansia muciniphila
- Intended focus: Support for muscle strength via gut pathways
According to Samyang Roundsquare, the ingredient has undergone multiple rounds of research and testing, including 12-week, randomized, double-blind, placebo-controlled clinical trials aimed at evaluating efficacy and safety. Details of those studies were not disclosed in the announcement, but the company says a recent clinical study involved adults aged 60+.
Muscle loss starts earlier than many expect
The launch is tied to what the company describes as a “silent” trajectory of muscle decline that can begin in the mid-30s. Loss of strength is associated with reduced mobility, changes in metabolic health and a shrinking health span—the years lived in good health. While protein and resistance training remain cornerstones of prevention, Samyang Roundsquare argues that addressing upstream biology in the gut may offer a complementary path.
| Claimed focus | Company’s positioning |
|---|---|
| Muscle strength support | Via gut-mediated mechanisms |
| Core ingredient | Akkermansia MYO™ (pasteurized postbiotic) |
| Study design cited | 12-week, randomized, double-blind, placebo-controlled trials |
| Target population noted | Adults, including those aged 60+ |
Context and caveats
The company’s framing reflects a broader research push examining how gut-derived signals can influence muscles and systemic inflammation. While A. muciniphila has been widely investigated in metabolic contexts and for gut barrier functions, translating those findings into strength outcomes is still an emerging area. The announcement does not provide study locations, sample sizes or quantitative results, information that will be important for independent assessment of effect size and reproducibility.
Spindle Muscle+ enters a crowded market where evidence standards vary. By citing randomized, placebo-controlled methods, Samyang Roundsquare is appealing to established clinical trial norms. Whether the benefits generalize beyond the specific study conditions—and how the product performs relative to established interventions like resistance training and dietary protein—remains to be clarified as data are made public.
A systems view of ageing and strength
The launch underscores a growing systems-biology perspective on ageing, in which muscular, metabolic and intestinal processes intersect. The company’s message is that sustaining strength is not solely about what happens in muscle fibres, but also about signals originating in the gut. With levels of Akkermansia said to decrease with age, Samyang Roundsquare is betting that a postbiotic approach—delivering bacterial components rather than live organisms—can be a practical way to target that biology.
As with any early-stage area, the next steps will hinge on the transparency and peer-reviewed reporting of the trials the company references. For now, the debut of Spindle Muscle+ spotlights the momentum—and the unanswered questions—around the gut’s role in muscle health.
