Samyang Roundsquare has launched Spindle, a science-led metabolic health brand, with its debut product Spindle Muscle+ — a postbiotic supplement built around the emerging concept of the gut–muscle connection. The product enters a crowded functional nutrition market by taking aim at an angle most protein powders and amino acid blends have overlooked: the role gut health plays in muscle synthesis, systemic inflammation, and long-term strength preservation.
The Clinical Case
At the core of Spindle Muscle+ is Akkermansia MYO™, a pasteurized, non-live postbiotic derived from Akkermansia muciniphila, a microbe tied to gut barrier integrity and metabolic function. The strain has been put through multiple clinical trials, including a 12-week, randomized, double-blind, placebo-controlled study in adults aged 60 to 80. That trial found participants taking Akkermansia MYO™ achieved a 10.4% increase in hamstring strength versus control, a 14.1% increase in muscle power versus control, and meaningful improvements in grip strength (+5.0 percentage points versus control). Researchers also recorded a 5.6-percentage-point increase in prealbumin — a biomarker linked to muscle maintenance and repair — and a 37.8-percentage-point decrease in myostatin, a protein that suppresses muscle growth when elevated.
"Maintaining muscle strength over time depends on more than protein and staying active alone," said Faissal Tahiri, Head of Healthcare at 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."
Operator and Retail Implications
The launch has clear relevance for hospitality and foodservice operators who have been expanding their wellness retail and in-room supplement offerings, as well as for grocery and specialty retailers building out the functional nutrition aisle. Spindle Muscle+ is shelf-stable for up to two years without refrigeration — a meaningful advantage for multi-location operators or resort properties managing supplement inventories.
Samyang is also positioning the product for the rapidly growing cohort of adults using GLP-1 medications, who face an elevated risk of lean muscle loss during weight change. That framing taps into one of the hottest adjacent conversations in restaurant and hospitality wellness programming, where operators are increasingly fielding guest questions about nutrition protocols tied to GLP-1 use.
The target consumer — health-invested adults in their 40s and 50s thinking proactively about longevity — overlaps substantially with the premium hospitality guest segment. For food and beverage directors building spa menus, wellness retreats, or curated retail corners, a clinically substantiated postbiotic with a clean label (gluten-free, non-GMO, free from common allergens, no artificial sweeteners or preservatives, produced in a GMP-certified facility) reduces the friction of guest skepticism.
Backing and Brand Positioning
Spindle is developed under Samyang Roundsquare, a Korea-based global food and healthcare company. Ahjin Kim, Head of R&D at Samyang Healthcare, framed the brand's philosophy plainly: "The clinical research behind Akkermansia MYO™ gave us the evidence we needed to bring that science into a product people can trust. Spindle Muscle+ reflects our commitment to formulating from data, not assumptions."
The product has also undergone FDA review as a New Dietary Ingredient (NDI), adding a layer of regulatory credibility that distinguishes it from many unvetted entrants in the postbiotic category — a segment that food and beverage industry analysts have flagged as both high-growth and prone to overcrowding. As the gut-health conversation continues to migrate from consumer wellness media into professional foodservice and hospitality channels, launches like Spindle signal that science-backed functional nutrition is moving decisively upmarket.
Written by Michael Politz, Author of Guide to Restaurant Success: The Proven Process for Starting Any Restaurant Business From Scratch to Success (ISBN: 978-1-119-66896-1), Founder of Food & Beverage Magazine, the leading online magazine and resource in the industry. Designer of the Bluetooth logo and recognized in Entrepreneur Magazine's "Top 40 Under 40" for founding American Wholesale Floral, Politz is also the Co-founder of the Proof Awards and the CPG Awards and a partner in numerous consumer brands across the food and beverage sector.
