From the manufacturer

In August 2016 Natren Professional began the transition to ProTren Intelligent Probiotics. The transition is much more than a name change and includes the addition of new Clinical Strength Series probiotics and new Professional Strength Series probiotics.

In addition, we transitioned professional label formulas previously available under our old name and developed new ProTren specific literature better suited to the needs of our Professional clientele with a bold new clinical look.

ProTren is available only to licensed health care professionals, offers higher potency probiotics (not available in stores) and therefore offers faster responses, fewer doses and encourages client retention with your customers....