Now 4 X 6 Acidophilus promotes positive probiotic balance and maintains healthy intestinal flora. Designed to supply a balanced spectrym of beneficial bacterian found in human intestinal tracts. 4 billion potency and 6 probiotic strains. Recommended Use: Take 1 capsule 1 to 2 times daily between meals or on an empty stomach, or as directed by a healthcare professional. Refrigerate to maintain potency.