ANAHEIM, Calif., – MeriCal, the largest supplier of store brand probiotics, announced today that it has completed and launched the first USP Verified probiotic supplement. By voluntarily participating in USP’s Dietary Supplement Verification Program, MeriCal has earned the right to carry the USP Verified Mark on two products. The USP Verified Mark signals that these proprietary probiotic formulations conform to applicable identity, purity and potency requirements established by United States Pharmacopeia (USP). The Anaheim-based company worked with USP to establish testing protocols for multi-strain probiotic supplements, facilitating this achievement.