Study of the Ability of Betaine Hydrochloride to Increase Stomach Acid in Healthy Volunteers

This study has been completed.
Information provided by (Responsible Party):
University of California, San Francisco Identifier:
First received: November 5, 2010
Last updated: May 14, 2013
Last verified: May 2013

In this study the investigators will test a nutritional supplement called betaine hydrochloride to see if it can temporarily increase the stomach acid in healthy volunteers who have decreased stomach acid because they take a medicine called rabeprazole.

Condition Intervention
Dietary Supplement: betaine hydrochloride
Drug: Rabeprazole

Study Type: Interventional
Study Design: Endpoint Classification: Pharmacodynamics Study
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: Pilot Study Evaluating Gastric Re-acidification Using Betaine Hydrochloride in Healthy Volunteers With Pharmacologically Induced Hypochlorhydria

Resource links provided by NLM:

Further study details as provided by University of California, San Francisco:

Primary Outcome Measures:
  • Change in Gastric pH After Administration of Betaine Hydrochloride (HCl) [ Time Frame: 30 minutes ] [ Designated as safety issue: No ]
    Gastric pH levels monitored with a Heidelberg pH capsule (HC) which sends real-time signals to a computer system that visually plots intestinal pH on a minute-by-minute basis. When subject's pH remained above 4.0 for at least 15 minutes, a 1500 mg dose of betaine HCl was given orally with 90 mL of water, and gastric pH was continuously monitored for 2 hours.

Secondary Outcome Measures:
  • Duration of Gastric pH Status [ Time Frame: 2 hours after dose of betaine HCl ] [ Designated as safety issue: No ]
    When subject's pH remained above 4.0 for at least 15 minutes, a 1500 mg dose of betaine HCl was given orally with 90 mL of water, and gastric pH was continuously monitored for 2 hours

Enrollment: 6
Study Start Date: March 2011
Study Completion Date: July 2011
Primary Completion Date: July 2011 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: betaine hydrochloride and rabeprazole Dietary Supplement: betaine hydrochloride
betaine hydrochloride 1500mg po x 1 on day 5
Drug: Rabeprazole
rabeprazole po daily x 5 days

Detailed Description:

Investigators will evaluate the extent and time course of gastric re-acidification after oral betaine HCl in healthy volunteers with pharmacologically-induced hypochlorhydria. After betaine HCl dose, gastric pH will be continuously monitored for 2 hours.


Ages Eligible for Study:   18 Years to 59 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Healthy adult with no active medical problems or significant chronic diseases as determined by the study doctor based on history, physical exam;
  • BMI between 18.5 - 35 kg/m2;
  • Taking no medications 2 weeks before and during the study enrollment, including drugs of abuse, prescription or OTC medications (except acetaminophen);
  • Subjects must be able to maintain adequate birth control during the study independent of hormonal contraceptive use;
  • Be able to provide written informed consent and comply with requirements of the study;
  • Avoid eating grapefruit and drinking grapefruit juice from 7 days before the first study day until completion of the entire study;
  • Abstinence from alcoholic beverages, caffeinated beverages and orange juice from 6pm the night before a study day until completion of that study day;
  • Fast from food and beverages at least 8 hours prior to the study day;
  • Be able to read, speak and understand English

Exclusion Criteria:

  • Subjects with a history of gastrointestinal disease including gastroesophageal reflux disease, gastritis, peptic ulcer disease or dyspepsia.
  • Subjects with a fasting gastric pH of > 4 (i.e. hypochlorhydria)
  • Subjects with history of dysphagia, achalasia, or difficulty swallowing capsules, tablets or pills.
  • Subjects on prescription or chronic over-the counter medications (including hormonal contraceptives);
  • Subjects with known allergy to study interventions;
  • Subjects who smoke tobacco;
  • Subjects with ongoing alcohol or illegal drug use;
  • Subjects who are pregnant, lactating or attempting to conceive;
  • Subjects unable to maintain adequate birth control during the study;
  • Subjects unable to follow protocol instructions or protocol criteria.
  Contacts and Locations
Please refer to this study by its identifier: NCT01237353

United States, California
University of California San Francisco
San Francisco, California, United States, 94143
Sponsors and Collaborators
University of California, San Francisco
Principal Investigator: Leslie Benet, PhD University of California, San Francisco
  More Information

No publications provided

Responsible Party: University of California, San Francisco Identifier: NCT01237353     History of Changes
Other Study ID Numbers: GastricpH-6264
Study First Received: November 5, 2010
Results First Received: May 14, 2013
Last Updated: May 14, 2013
Health Authority: United States: Institutional Review Board

Additional relevant MeSH terms:
Gastrointestinal Agents
Therapeutic Uses
Pharmacologic Actions
Lipotropic Agents
Hypolipidemic Agents
Molecular Mechanisms of Pharmacological Action
Lipid Regulating Agents
Enzyme Inhibitors
Anti-Ulcer Agents processed this record on April 17, 2014