1. Ability/desire to provide informed consent
2. Aged 18 to 65 years of age inclusive at screening
3. Self report of lactose intolerance or lactose maldigestion
4. Agrees to refrain from all other treatments and products used for dairy intolerance (e.g., Lactaid®, Dietary Supplements, probiotics) during study involvement
5. Willing to return for all study visits and complete all study related procedures, including fasting before and during the hydrogen breath tests, and avoiding lactose in their diets (ex. milk, fluid, and soft dairy foods) for Days 1-28 of the study
6. Able to understand and provide written informed consent in English
Exclusion Criteria:
1. Allergic to milk
2. Currently pregnant
3. Currently lactating
4. Cigarette smoking or other use of tobacco or nicotine containing products within 3 months of screening
5. Diagnosed with any of the following disorders known to be associated with abnormal gastrointestinal motility such as; Gastroparesis, amyloidosis, neuromuscular diseases (including Parkinson's disease), collagen vascular diseases, alcoholism, uremia, malnutrition, or untreated hypothyroidism
6. History of surgery that alters the normal function of the gastrointestinal tract including, but not limited to: gastrointestinal bypass surgery, bariatric surgery, gastric banding, vagotomy, fundoplication, pyloroplasty \[Note: history of uncomplicated abdominal surgeries such as removal of an appendix more than 12 months prior to screening will not be excluded\]
7. Past or present : Organ transplant, chronic pancreatitis, pancreatic insufficiency, symptomatic biliary disease, Celiac disease, chronic constipation, diverticulosis, inflammatory bowel disease (IBD), ulcerative colitis (UC), Crohn's disease (CD), small intestine bacterial overgrowth syndrome (SIBO), gastroparesis, gastro-esophageal reflux disease (GERD), Irritable Bowel Syndrome (IBS) or any other medical condition with symptoms that could confound collection of adverse events.
8. Active ulcers, or history of severe ulcers
9. Diabetes mellitus (type 1 and type 2)
10. Congestive Heart Failure (CHF)
11. Human Immunodeficiency Virus (HIV), Hepatitis B or Hepatitis C
12. BMI > 35 kg/m2
13. Recent bowel preparation for endoscopic or radiologic investigation within four weeks of screening (e.g., colonoscopy prep)
14. Use of concurrent therapy(ies) or other products (e.g., laxatives, stool softeners, Pepto Bismol®,Lactaid® Dietary Supplements, probiotics) used for symptoms of dairy intolerance within 7 days of screening
15. Chronic antacid and/or PPI use
16. Recent use of systemic antibiotics defined as use within 30 days prior to screening
17. Recent high colonic enema, defined as use within 30 days prior to screening
18. Any concurrent disease or symptoms which may interfere with the assessment of the cardinal symptoms of dairy intolerance (i.e., gas, diarrhea, bloating, cramps /stomach pain, fecal urgency)
19. History of ethanol (alcohol) and/or drug abuse in the past 12 months
20. Currently undergoing chemotherapy
21. Use of any investigational drug or participation in any investigational study within 30 days prior to screening
22. Prior enrollment in this study
23. Any other conditions/issues noted by the study staff and/or Principal Investigator that would impact participation and/or protocol compliance