betaine hydrochloride
Also known as: Betaine HCl, trimethylglycine hydrochloride, Betaine hydrochloride
Overview
Betaine hydrochloride (Betaine HCl) is the hydrochloride salt of betaine, a compound naturally found in foods like beets and spinach. It is primarily utilized as a dietary supplement to increase stomach acid (gastric acid) levels, particularly in individuals experiencing hypochlorhydria or achlorhydria (low or absent stomach acid), thereby supporting digestive processes. Beyond its role as an acidifier, betaine also functions as a methyl donor in various metabolic pathways. While extensive research exists on betaine's metabolic effects, studies specifically on betaine HCl for digestive support are more limited, often relying on case reports and smaller trials. It is available in oral supplement form.
Benefits
Betaine HCl's primary benefit is its ability to temporarily increase gastric acidity, which can significantly improve digestion and nutrient absorption in individuals with low stomach acid. This effect is supported by case studies showing symptom relief and improved nutrient status in achlorhydria patients. While not specific to betaine HCl, betaine supplementation has shown promise in body composition: a 2019 meta-analysis of six randomized controlled trials (RCTs) indicated a significant reduction in total body fat mass (approx. 2.53 kg) and body fat percentage (2.44%) without affecting body weight or BMI. However, the evidence for betaine HCl's direct impact on body fat is less clear. It's important to note that some research on betaine (not specifically betaine HCl) suggests it may moderately increase total and LDL cholesterol levels, which could have cardiovascular implications.
How it works
Betaine HCl functions by dissociating in the stomach to release hydrochloric acid, directly increasing gastric acidity. This elevated acidity is crucial for the proper digestion of proteins and the activation of digestive enzymes, such as pepsin. The betaine component itself acts as a methyl donor within the methionine-homocysteine cycle, influencing various methylation reactions and potentially impacting lipid metabolism. While betaine is highly bioavailable and absorbed in the small intestine, the HCl component exerts its primary action locally within the stomach to facilitate digestion.
Side effects
Betaine HCl is generally considered safe for short-term use at recommended doses. The most common side effects, affecting over 5% of users, include gastrointestinal discomfort such as heartburn, nausea, and stomach irritation, which are often related to its acidifying action. Less common side effects (under 1%) may involve the exacerbation of pre-existing conditions like peptic ulcers or gastritis. A significant consideration is that betaine supplementation (not specifically betaine HCl) has been linked to moderate increases in total and LDL cholesterol levels, which warrants caution for individuals with cardiovascular risk factors. Contraindications for betaine HCl use include active peptic ulcer disease and severe gastritis. While specific drug interactions are not well-documented, caution is advised when co-administering with acid-sensitive medications.
Dosage
Typical dosages for betaine HCl range from 650 mg to 1,500 mg per meal, aimed at increasing stomach acidity to aid digestion. However, precise dosing should be individualized based on symptom response and ideally under medical supervision. There is no established maximum safe dose, but excessive acidification carries a risk of mucosal irritation. Betaine HCl should be taken with meals to optimize its digestive benefits. While no specific cofactors are required, individuals with vitamin B12 deficiency may benefit from monitoring, as B12 absorption is dependent on adequate stomach acid. It is crucial to start with a lower dose and gradually increase as tolerated, observing for any signs of discomfort.
FAQs
How do I know if I need betaine HCl?
Symptoms of low stomach acid, such as bloating, heartburn, early satiety, and nutrient deficiencies, may indicate a need for betaine HCl. Consult a healthcare provider for proper diagnosis.
Is betaine HCl safe for long-term use?
Long-term safety data for betaine HCl are limited. Extended use should be monitored by a healthcare professional to assess efficacy and potential side effects.
Will betaine HCl help with weight loss?
Betaine (not specifically betaine HCl) may modestly reduce body fat mass and percentage, but it does not significantly impact overall body weight or BMI. Its primary role is digestive support.
Does betaine HCl increase cholesterol?
Betaine supplementation has been associated with moderate increases in LDL cholesterol. While the direct effect of betaine HCl alone is less clear, individuals with cardiovascular concerns should consider this potential risk.
Research Sources
- https://pmc.ncbi.nlm.nih.gov/articles/PMC6835719/ – This systematic review and meta-analysis by Gao et al. (2019) analyzed six RCTs (n=195) on betaine supplementation and obesity-related indices. It found significant reductions in body fat mass and percentage, but no effect on body weight or BMI, suggesting betaine's role in fat reduction rather than overall weight loss. The study noted low heterogeneity and moderate quality among the included trials.
- https://drruscio.com/betaine-hcl/ – This article discusses betaine HCl's role as a digestive aid, particularly for individuals with low stomach acid. It highlights its ability to temporarily increase gastric acidity for about an hour post-ingestion, improving digestion and nutrient absorption. The content also references case studies showing symptom relief in achlorhydria patients.
- https://pubmed.ncbi.nlm.nih.gov/31809615/ – This systematic review and meta-analysis by Zawieja et al. (2021) investigated betaine's impact on cholesterol levels. It reported a moderate increase in total and LDL cholesterol, indicating a potential safety concern for cardiovascular health. The review included multiple RCTs with adequate sample sizes, providing robust evidence for this effect.
- https://www.clinicaltrials.gov/study/NCT06881511?term=BETAINE&rank=6 – This clinical trial registration (NCT06881511) indicates ongoing research related to betaine. While specific results are not yet available, such trials contribute to the understanding of betaine's effects, including its potential to restore gastric acidity and improve digestion, as suggested by earlier case reports.
- https://consensus.app/search/does-betaine-hydrochloride-increase-ldl-cholestero/INxbdIMoRgWDoGWb83BaNQ/ – This source provides a summary of research regarding betaine hydrochloride and its potential effect on LDL cholesterol. It corroborates findings that betaine supplementation may increase LDL cholesterol, emphasizing the need for consideration in individuals with cardiovascular risk, though the direct relevance to betaine HCl specifically is noted as less clear.
Supplements Containing betaine hydrochloride

Bone-Active Bone Reinforcer With Hydroxyapatite
Vitamin World

Ultra Vita-Min Iron Free
Puritan's Pride

Multi-Enzyme Formula
Rexall

Women's Multiple
Radiance Select

Multi Vitamin With Minerals
Radiance Select

Hair Skin & Nails
Rexall
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