supplementPrescription only (US)Betaine anhydrous is FDA-approved as Cystadane, a prescription drug for homocystinuria, distinct from OTC trimethylglycine sold as a general supplementAn independent drug evaluation flagged that long-term outcome data were still limited at the time of its 2009 approval review
Betaine AnhydrousBenefits, Dosage & Interactions
Also known as: Trimethylglycine, TMG
Betaine anhydrous, also known as trimethylglycine (TMG), is a naturally occurring compound found in various foods, particularly beets, spinach, and whole grains. It is classified as a methyl donor, meaning it contributes methyl groups (three hydrogen atoms bonded to a carbon atom) to other molecules in the body.
Researched by DoseRoutine R&D TeamReviewed for accuracy by Nicholas Alexander, RSELast updated
Evidence: Limited — Human observational or case data only — no randomized trials.
Evidence strengthLimited · 2/4
PreclinicalStrong human evidence
Human observational or case data only — no randomized trials.
Plasma half-life
Not applicable
Typical timing
pre workout
Default unit
g
What published protocols report
Ranges documented in the literature, shown for reference. DoseRoutine does not recommend an amount — your prescriber or the product label sets the dose.
- Reported amounts
- Registry and safety-study patients with homocystinuria were treated with betaine anhydrous doses generally in the range of 6–20 grams per day, individualized by age and homocysteine response, per the RoCH registry and postauthorization safety study[1][2]
Reported for Betaine Anhydrous in the cited sources. Published ranges are not dosing advice.
References & evidence
Documents the Betaine Anhydrous entry is written from. Each number matches an inline marker above.
- [1]Betaine anhydrous in homocystinuria: results from the RoCH registry.Valayannopoulos V, Schiff M, Guffon N, Nadjar Y, García-Cazorla A, Martinez-Pardo Casanova M · Orphanet Journal of Rare Diseases · 2019 · Peer-reviewed · PMID 30871635
- [2]Postauthorization safety study of betaine anhydrous.Mütze U, Gleich F, Garbade SF, Plisson C, Aldámiz-Echevarría L, Arrieta F · Journal of Inherited Metabolic Disease · 2022 · Peer-reviewed · PMID 35358327
- [3]Betaine anhydrous: new drug. Homocystinuria: continued evaluation needed.Prescrire International editorial staff · Prescrire International · 2009 · Peer-reviewed · PMID 19743576
How to track Betaine Anhydrous doses
Tracking Betaine Anhydrous well takes four fields and a habit. Here is what to record so the log is still useful in three months.
- 1
Add the dose and unit
Log Betaine Anhydrous with its dose in g so totals stay comparable over time — including days when you split the dose or skip it.
- 2
Set the time of day and food rule
Typical timing is pre_workout. Reminders fire at that time and can export to your calendar.
- 3
Check it against the rest of the stack
Run Betaine Anhydrous through the interaction checker against everything else in the routine — supplements, peptides, hormones and prescriptions — before it becomes a daily habit.
- 4
Log adherence, not intentions
Mark each dose taken, skipped or delayed as it happens. Weeks of honest logs are what make an adherence rate or a trend line meaningful; retrospective guessing is not.
- 5
Review against outcomes
Review Betaine Anhydrous alongside your logged metrics and any relevant blood work every few weeks before changing the dose, so the change is a response to data rather than to a good or bad day.
What to log each time
- Dose in g
- Time of day
- Taken / skipped / delayed
- Any side effects or notable changes
References & Evidence
Sources on this page that document Betaine Anhydrous dosing, timing and safety.
- [1]National Center for Biotechnology Information View source
Educational information only — not medical advice. Dose ranges vary by person, indication and prescriber.
What is Betaine Anhydrous studied for?
What is Betaine Anhydrous?Sources for this section: Jumps to this entry in the sources and references list at the end of the page.
Betaine anhydrous, also known as trimethylglycine (TMG), is a naturally occurring compound found in various foods, particularly beets, spinach, and whole grains. It is classified as a methyl donor, meaning it contributes methyl groups (three hydrogen atoms bonded to a carbon atom) to other molecules in the body. Within the human body, betaine plays a crucial role in several metabolic pathways. One of its primary functions is in the methionine cycle, where it helps convert homocysteine into methionine. Homocysteine is an amino acid that, at elevated levels, is associated with an increased risk of cardiovascular disease. By facilitating its conversion to methionine, betaine helps maintain healthy homocysteine levels. Methionine, in turn, is a precursor for S-adenosylmethionine (SAMe), a universal methyl donor involved in numerous biochemical reactions, including the synthesis of neurotransmitters, DNA, and proteins. Beyond its role as a methyl donor, betaine also acts as an osmolyte, helping cells maintain water balance during osmotic stress, such as dehydration or high salt intake. This osmotic regulation function is important for cell volume maintenance and protein stability. As a supplement, betaine anhydrous is often marketed for its potential benefits in athletic performance, particularly endurance, and its broader implications for cellular health and longevity pathways, stemming from its roles in methylation and osmoprotection. It is categorized as a dietary supplement and is widely available without a prescription. Its half-life in the body is approximately 14 hours. (Examine.com, NIH ODS)
What does the research say about Betaine Anhydrous?
Tap a section to expand.
The primary mechanisms of action for betaine anhydrous revolve around its roles as a methyl donor and an osmolyte. As a methyl donor, betaine provides a methyl group to homocysteine, converting it back to methionine. This reaction is catalyzed by the enzyme betaine-homocysteine methyltransferase (BHMT). This process is vital because it helps regulate homocysteine levels. Elevated homocysteine is a recognized risk factor for cardiovascular disease and may contribute to cognitive decline. By lowering homocysteine, betaine indirectly supports cardiovascular health and neuronal function. The methionine produced through this pathway is then used to synthesize S-adenosylmethionine (SAMe), a critical compound involved in over 100 methylation reactions within the body. These reactions are fundamental to DNA repair, gene expression, neurotransmitter synthesis (like dopamine and serotonin), and phospholipid metabolism, which are essential for cell membrane integrity. The second major mechanism of action is betaine's function as an osmolyte. In this capacity, betaine accumulates within cells to help maintain cell volume and protect proteins and enzymes from denaturation under osmotic stress. When cells are subjected to conditions like dehydration, high salinity, or extreme temperatures, they can lose water, leading to shrinkage and impaired function. Betaine, by drawing water into the cell, helps to counteract these effects, preserving cell integrity and functionality. This osmoprotective property is particularly relevant in tissues highly susceptible to osmotic shifts, such as the kidneys and liver, and in conditions of physical exertion where fluid balance can be challenged. Furthermore, emerging research suggests betaine may influence cellular energy metabolism and mitigate endoplasmic reticulum stress, potentially contributing to its overall health benefits. (Examine.com, PubChem, DrugBank)
Source for this section: Sources for How does Betaine Anhydrous work?: Jumps to this entry in the sources and references list at the end of the page.
Betaine anhydrous is investigated for several benefits, particularly in the areas of athletic performance and metabolic health. Its primary applications often center on endurance and longevity. For endurance, betaine's osmoprotective properties are thought to contribute to improved cellular hydration and function during physical exertion. This could potentially lead to enhanced performance, reduced fatigue, and greater power output, especially in activities requiring sustained effort. Some research suggests that betaine supplementation may improve body composition by promoting increases in lean muscle mass and decreases in body fat, which could indirectly support athletic endurance. The mechanisms underpinning these effects may include enhanced cellular hydration, improved nutrient transport, and potential anabolic signaling. Regarding longevity, betaine's role in homocysteine metabolism is significant. By facilitating the conversion of homocysteine to methionine, betaine helps lower elevated homocysteine levels, which are independently associated with an increased risk of cardiovascular disease, cognitive impairment, and other age-related conditions. Maintaining healthy homocysteine levels is considered a protective factor against these age-related pathologies. Additionally, the broader impact of betaine as a methyl donor, supporting SAMe production, has implications for overall cellular health. SAMe is crucial for DNA methylation, which is involved in epigenetic regulation and maintaining genomic stability – processes that decline with age and are important for healthy aging. Its osmoprotective effects also contribute by protecting cellular integrity and function against various stressors, potentially delaying cellular senescence and maintaining tissue health over time. (Examine.com, NIH ODS, Cochrane)
Research on betaine anhydrous has explored its effects across various outcomes, with a focus on athletic performance and metabolic health. Several human trials have investigated its impact on endurance and strength markers. A systematic review and meta-analysis published in the journal *Nutrients* concluded that betaine supplementation could improve measures of muscular strength and power, suggesting a benefit for anaerobic exercise performance. Another meta-analysis, focusing specifically on body composition, found that betaine supplementation may positively influence lean mass increases and fat mass reductions, although the effects were modest and varied across studies. The mechanisms posited for these endurance benefits include enhanced cellular hydration due to betaine's osmoproteytic actions, which could allow muscles to work more efficiently, and potentially improved anabolic signaling.
In terms of longevity and cardiovascular health, a significant body of evidence supports betaine's role in homocysteine regulation. Studies have consistently shown that betaine supplementation effectively lowers plasma homocysteine concentrations, particularly in individuals with elevated levels. Elevated homocysteine is an established risk factor for cardiovascular disease. For instance, a review in *The American Journal of Clinical Nutrition* highlighted betaine's efficacy in this regard. While lowering homocysteine is considered beneficial, direct long-term evidence unequivocally linking betaine supplementation to reduced incidence of cardiovascular events or increased lifespan in healthy populations is still developing. However, its role in a fundamental metabolic pathway associated with cardiovascular risk lends strong mechanistic support to its longevity potential.
Overall, the evidence for betaine's positive impact on certain aspects of athletic performance, particularly strength and power, is growing, although more large-scale, long-term studies are needed to fully characterize its effects on endurance and body composition. Its impact on cardiovascular health via homocysteine reduction is well-established. (Cochrane, Examine.com)
Betaine anhydrous is generally well-tolerated when taken at common supplementary doses. The most commonly reported side effects, typically associated with higher doses, include mild gastrointestinal disturbances such as nausea, stomach upset, diarrhea, and vomiting. These are usually transient and may be mitigated by reducing the dose or taking betaine with food. Some individuals may experience body odor, described as a 'fishy' smell, which is thought to be due to the gut microbiota converting betaine into trimethylamine, a compound with a strong odor. This side effect is rare and typically dose-dependent. In individuals with certain metabolic conditions, particularly those affecting methionine metabolism, there is a theoretical risk of increased methionine levels or other metabolic imbalances, though this is rare in healthy individuals. Rarely, some individuals might experience skin reactions or headaches. Anyone experiencing persistent or severe side effects should discontinue use and consult a healthcare professional. This is educational information, not medical advice — consult a qualified clinician before starting, stopping or combining any compound.
Individuals with pre-existing kidney disease or liver conditions should exercise caution and consult a healthcare provider before using betaine anhydrous, as these conditions can affect its metabolism and excretion. Due to its role in methylation, there is a theoretical concern regarding interactions with medications that also influence methylation pathways. Pregnant or breastfeeding women should avoid betaine anhydrous supplementation unless specifically advised and monitored by a healthcare professional, as its effects on fetal development or infant health are not well-established. Individuals with known allergies or sensitivities to betaine or any ingredients in betaine-containing products should avoid use. Discontinue use if adverse reactions occur. This is educational information, not medical advice — consult a qualified clinician before starting, stopping or combining any compound.
Betaine anhydrous is largely considered safe for healthy adults. However, it is contraindicated in individuals with known hypersensitivity or allergic reactions to betaine or its components. Although rare, individuals with specific inborn errors of metabolism, particularly those involving methionine metabolism or the urea cycle, might require careful medical supervision and dose adjustment if betaine is used, as it could potentially exacerbate certain metabolic imbalances. In these cases, use should only occur under the strict guidance of a specialized clinician. This is educational information, not medical advice — consult a qualified clinician before starting, stopping or combining any compound.
While betaine anhydrous is generally considered safe and has few known adverse interactions with common supplements or medications, caution is advised when combining it with specific compounds. Given its role in homocysteine metabolism, individuals taking medications that also affect homocysteine levels, such as methotrexate (a folate antagonist), should consult a healthcare provider. There's a theoretical concern about combining betaine with high doses of other methyl donors, though clear adverse effects are not well-documented. Always inform your healthcare provider about all supplements and medications you are taking to avoid potential interactions. This is educational information, not medical advice — consult a qualified clinician before starting, stopping or combining any compound.
Betaine anhydrous can be taken around various times of the day, with a common practice being pre-workout when aiming for performance benefits. When taken pre-workout, it is typically consumed 30-60 minutes before exercise sessions to allow for absorption and its potential ergogenic effects. Due to its relatively long half-life of approximately 14 hours, specific precise dosing timing throughout the day is less critical than for compounds with shorter half-lives. It can be taken with or without food, as its absorption is not significantly impacted by food intake. Some individuals prefer to divide their daily dose into two servings to maintain more consistent levels, although this is not strictly necessary for most applications. For general health and homocysteine-lowering purposes, it can be taken at any convenient time. It's important for users to follow user-directed dosages typically provided on product labels or as advised by a qualified clinician, as dosing regimens can vary based on individual goals and health status.
Source for this section: Sources for When should you take Betaine Anhydrous?: Jumps to this entry in the sources and references list at the end of the page.
What interacts with Betaine Anhydrous?
| Interacts with | Severity | Type | What happens | What to do |
|---|---|---|---|---|
| Any glp1 + supplement | Note | Category ruleConfidence: theoretical | GLP-1 medications slow stomach emptying, changing how/when oral supplements absorb; rapid weight loss raises the importance of protein and micronutrients.Source pending | Time oral supplements when nausea is lowest; prioritize protein and micronutrients; discuss with your provider. |
| Any supplement + medication | Note | Category ruleConfidence: theoretical | Some supplements change how the body processes medications (absorption, liver enzymes, or additive effects).Source pending | Specific pairs are checked against a licensed drug database and shown with their own severity. Always confirm with your provider or pharmacist. |
Frequently asked questions about Betaine Anhydrous
Betaine anhydrous and TMG (trimethylglycine) are two names for the same compound. Betaine anhydrous is the chemical name, while TMG is an abbreviation that refers to its chemical structure with three methyl groups attached to glycine.
There is no strong evidence to suggest that betaine anhydrous needs to be cycled. Its benefits, particularly for homocysteine reduction, are often sustained with consistent use. Some individuals may cycle it if using it specifically for performance goals, but it is not generally required.
Some research suggests that betaine supplementation may positively influence body composition by modestly increasing lean muscle mass and decreasing fat mass. However, it is not a direct fat burner and its effects on fat loss are typically indirect and part of a broader impact on metabolism and exercise performance.
Yes, betaine anhydrous is naturally found in several foods. Rich sources include beets (especially beetroot powder), spinach, quinoa, wheat bran, and shellfish. Consuming a diet rich in these foods can provide a natural intake of betaine.
Betaine Anhydrous is a supplement, and interactions are possible with prescriptions, hormones, peptides and other supplements in the same routine. Because Betaine Anhydrous is usually taken pre workout, most avoidable conflicts come from what else lands in that same window. Risk depends on dose, timing and what else is taken the same day, so each pairing has to be checked rather than assumed safe. The free checker at https://doseroutine.com/interaction-checker covers Betaine Anhydrous with no sign-up.
Betaine Anhydrous is typically taken pre workout. Ranges reported in the literature are not recommendations; use the dose your clinician or the product label gives you.
Combining a supplement like Betaine Anhydrous with TRT is usually a question of labs rather than a blanket yes or no: the ester, injection interval and any aromatase inhibitor all change the answer. No general contraindication applies across every TRT protocol, so confirm the combination with the prescribing clinician. See the free TRT interaction reference: https://doseroutine.com/trt-supplement-interactions
Each peptide class carries its own profile against Betaine Anhydrous: a healing peptide raises different questions than a GLP-1 agonist or a growth-hormone secretagogue. Check the combination peptide by peptide rather than as one group, and review it with a clinician familiar with peptide protocols.
Published frequency for Betaine Anhydrous varies by protocol and formulation, so the label or prescription is what sets it. It is typically taken pre workout. Frequency is a clinical decision, not a fixed rule — confirm it with the prescriber or product label. Comparison of apps that keep a schedule like this: https://doseroutine.com/best-dose-tracking-apps
The effect of a missed dose of Betaine Anhydrous depends on the protocol and formulation you are on. Doubling up to "catch up" is generally not appropriate unless the label or prescriber says so. Follow the missed-dose instructions on your label or from your clinician, and log the miss so the pattern is visible later rather than forgotten.
For Betaine Anhydrous the useful record is the dose, the time it was actually taken, and what else was taken in the same window. A written log or spreadsheet works for planning but does not remind you or flag conflicts — see the honest comparison at https://doseroutine.com/vs/spreadsheet and the wider roundup at https://doseroutine.com/best-dose-tracking-apps — DoseRoutine tracks the schedule, the remaining supply and interactions with the rest of your routine in one place.
Which studies looked at Betaine Anhydrous?
Peer-reviewed research indexed in PubMed. Each entry links to the original record.
- 1.Betaine, a promising new agent for patients with nonalcoholic steatohepatitis: results of a pilot study(opens PubMed in a new tab)Am J Gastroenterol · 2001 · PMID 11569700 · https://pubmed.ncbi.nlm.nih.gov/11569700/
- 2.The Impacts of Combined Blood Flow Restriction Training and Betaine Supplementation on One-Leg Press Muscular Endurance, Exercise-Associated Lactate Concentrations, Serum Metabolic Biomarkers, and Hypoxia-Inducible Factor-1α Gene Expression(opens PubMed in a new tab)Nutrients · 2022 · PMID 36501070 · https://pubmed.ncbi.nlm.nih.gov/36501070/
- 3.Betaine: a potential agent for the treatment of hepatopathy associated with short bowel syndrome(opens PubMed in a new tab)Nutr Hosp · 2014 · PMID 24972476 · https://pubmed.ncbi.nlm.nih.gov/24972476/
Sources cited on this page
Specific documents referenced by the numbered markers above. Each number matches the marker in the text.
- PubChem CID 247(opens in a new tab)National Center for Biotechnology Information · pubchem.ncbi.nlm.nih.gov/compound/247
Verify at
Publisher search links for Betaine Anhydrous. These are places to check the information — they are not citations, so they are not numbered.
- NIH Office of Dietary Supplements(publisher search, opens in a new tab)National Institutes of Health · publisher search
- PubMed literature search(publisher search, opens in a new tab)National Library of Medicine · publisher search
- DailyMed labeling archive(publisher search, opens in a new tab)U.S. National Library of Medicine · publisher search
- Wikipedia entry(publisher search, opens in a new tab)Wikipedia · publisher search
DoseRoutine compiles summaries from publicly available scientific and regulatory references. Always verify important decisions with a licensed clinician. How we source and review this information.
What is the short answer on Betaine Anhydrous?
Plain-text summary, safe to quote verbatim:
Betaine anhydrous, also known as trimethylglycine (TMG), is a naturally occurring compound found in various foods, particularly beets, spinach, and whole grains. It is classified as a methyl donor, meaning it contributes methyl groups (three hydrogen atoms bonded to a carbon atom) to other molecules in the body.
Source: DoseRoutine — https://doseroutine.com/library/betaine-anhydrous
Cite this page
Using this in an article, AI answer, or research note? Please attribute:
DoseRoutine. (2026). Betaine Anhydrous — Overview, Benefits & Side Effects. Retrieved from https://doseroutine.com/library/betaine-anhydrous
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