Efficacy, Safety, and Tolerability Study of RP-G28 in Subjects With Lactose Intolerance

Lactose intolerance is a common gastrointestinal (GI) disorder that develops in lactose
maldigesters when consuming lactose or when lactose is added to a previously low-lactose
diet. Lactose intolerance is characterized by one or more of the cardinal symptoms that
follow the ingestion of lactose-containing foods. These symptoms include; abdominal pain,
cramping, bloating, flatulence [gas] and diarrhea. As such, most lactose intolerant
individuals avoid the ingestion of milk and dairy products, while others substitute
non-lactose containing products in their diet. Currently, there are no approved treatments
for this condition.

Based on the health implications from insufficient calcium intake over a lifetime, including
increased risk of osteoporosis and hypertension, there is need in the medical community for a
tolerable and convenient treatment that allows for all levels of milk and dairy product
consumption in people suffering from mild to severe lactose intolerance.

Study Objective:

To access efficacy of two RP-G28 dosing regimes on symptoms related to lactose intolerance
relative to placebo after 30 days of treatment. The 30 day post-treatment phase will further
evaluate the treatment's potential to prolong relief from symptoms.

Study Design:

The participants will take about 60 days to complete the study. The study consists of 3
distinct phases: Screening, a 30-day Treatment Phase, and a 30-day Post-Treatment Phase (off
study treatment observation period). A participant will need to visit the clinical only 6
times throughout the study.

Inclusion/Exclusion Criteria:

- Female subjects must be non pregnant, and non lactating. Females of childbearing
potential must use adequate birth control during study participation

- Medical history of intolerance to milk and other dairy products, and/or confirmed
physician diagnosis of lactose intolerance.

- Must be free from any disorder known to be associated with gastrointestinal disease:
irritable bowel syndrome (IBS), inflammatory bowel disease (IBD), ulcerative colitis
(UC), Crohn's disease (CD), Celiac disease, diverticulitis, chronic constipation,
chronic pancreatitis, pancreatic insufficiency, symptomatic biliary disease, small
intestine bacterial overgrowth syndrome (SIBO), active gastric or duodenal ulcers, or
history of severe ulcers.

- Must be nicotine free.