Restore regularity with Master Supplements Theralac Probiotic in this convenient 10 capsule pack. Theralac is a potent, multi-strain probiotic in a stomach acid resistant formula. Its patented acid-proof delivery system features LactoStim prebiotic stimulation and active Bifido strains for the colon. Contains no yeast, eggs, corn, soy, gluten, wheat, casein, salt or beef products. Each batch is laboratory tested to meet strict quality control standards.