P3-OM is a patented, Super-strain formula and potent as well for protein digestion and healthy gut bacteria. This is a unique feature of P3-OM, and it triumphs over other brands. P3-OM does not require any refrigeration to maintain its potency, but other branded probiotics need refrigeration and other special facilities. It is suitable for vegetarians, lactose-intolerants, and vegans too. But other brands are not appropriate for everyone.