Our Story


To provide those in need with the highest quality supplements to support healthy lifestyles and provide digestive results you can feel!


  • Higher Standards: we strive to raise the standard in every aspect of our business, from how we treat our employees and customers, to how we develop and formulate our products.
  • Honesty: we are committed to full-transparency to help our customers to make informed decisions for themselves and their families.
  • Hard Work: we believe in rolling up our sleeves and doing what it takes to get the job done and doing so with excellence.
  • Helping People: our products genuinely help people so we come to work knowing that we make a positive difference in our customer's lives.

Man and son standing in a field looking at mountains on the horizon


In 2003, Randolph S. Porubcan created the formula for Theralac®, Master Supplements’ first probiotic. It led the way in so many vital areas that have become cornerstones to many quality probiotics available today. Randy, a microbiologist, relied on over 40 years of experience researching naturally occurring, symbiotic microorganisms to develop a probiotic formula that would colonize the entire GI tract with well documented strains. He authored seven U.S. Patents that protected the unique delivery through harsh stomach acid as well as the special prebiotic stimulation with LactoStim®.

As a scientist, Randy knew that he would need help spreading the word on this breakthrough probiotic so he partnered with Jeff Thurston, a seasoned sales and marketing executive, who promptly took the torch and began attending countless healthcare professional events and trade shows. These professionals became Master Supplements' foundation and they were clearly excited about the positive results. Word of mouth became our greatest advertising and soon Theralac was reaching retailers, professionals, and consumers around the world. In the years that followed, a full line of digestive health products were developed that matched Theralac’s high standards and proven efficacy.


Today, Master Supplements is powered by a dedicated team of employees who continue to raise the standard. Each one is a valued team member and we are dedicated to their success. You will find that everyone at Master Supplements Inc. shares a state of mind that can’t be taught or trained. Team members are courteous, respectful, and reflect the highest degree of integrity in all actions. Our staff believes in our products and the ability we have to create well-being, happiness, and a healthier life for our customers.


Without our amazing staff and our dedicated customers, we would not be here today but credit must also be given to the products themselves. Time and time again, we realize that our products are the stars of the show. They have different actions and applications but they all share the following key features:

  • Results: All of our products are guaranteed to provide results or your money back, period.
  • Technology: Each of our formulations are supported by superior science.
  • Value: if you don't feel better, you don't pay. What better value is there?
  • Quality: Don't take our word for it, click here to view third party test results for each of our products: MSI Quality Assurance