Summary: The purpose of this study is to determine if twice or three times daily supplementation of Lactobacillus acidophilus MPH734 (Lacto-FreedomTM, or LF), for one week, affects acute (immediate), subacute (7 days), and post-treatment discontinuation (30-, 60-, and 90- day) lactose metabolism, gastrointestinal symptoms, and clinical markers of inflammation and safety compared to a placebo.