Better Health, Better Performance, Better Business

The Industry Leading Probiotic

PrimaLac is the preferred probiotic for nutritionists and decision makers tasked with maintaining healthy animals. It works by maintaining an optimal microbial balance of good bacteria over pathogenic bacteria, which helps production animals of all types increase performance and overall yield.

A unique combination of bacteria, grown and processed with proprietary standards developed over decades by Star-Labs research, have made PrimaLac the industry leader. Animal health outcomes and the shelf viability of PrimaLac products set it apart from others on the market.

Why Probiotics?

Insights from Industry Experts

Over decades of field work—from poultry grow-out barns to cattle farms—we have compiled insightful field trial data. Browse our available data by species and complete the form to request the information relevant for your business.

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What Makes Our Cultures Different

Our ethos of research first means the best cultures are selected based on each species’ unique needs. Learn more about our cultures.

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The Professionals Behind the Innovation

Star-Labs, the manufacturer of PrimaLac, has built its reputation as a major supplier of microbial cultures for over forty years. As a family-oriented business based in Missouri, USA, our industry knowledge and experience has turned our company into a globally recognized name. Today, we continue to develop solutions across sectors—from large and small feed companies to livestock producers.

Star Labs

Research

Star-Labs, the manufacturer of PrimaLac, has built its reputation as
a major supplier of microbial cultures for over forty years.

“Effect of a direct-fed microbial (Primalac) on structure and ultrastructure of small intestine in turkey poults”

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“Metabolic and Physiological Impact of Probiotics or Direct-Fed-Microbials on Poultry: A Brief Review of Current Knowledge”

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“Effects of Different Levels of Direct Fed Microbial (Primalac) on Growth Performance and Humoral Immune Response in Broiler Chickens”

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“Effects of direct-fed microbial supplementation on digestibility and fermentation end-products in horses fed low-and high-starch concentrates”

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