Swanson do not test for a strain number on most of their probiotics with their contract manufacturers, only the strain type. Most often a specific strain number is under a patent and is a trademarked ingredient. Since Swanson do not have an agreement in place with the company that owns the patent and/or trademark, they cannot legally provide this information.
Modified on: Wed, 2 Aug, 2017 at 12:20 PM
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