Best TMG Supplements: Capsules, Tablets and Powder Compared

The best TMG supplement for you should identify betaine anhydrous clearly, state the amount per unit and fit the way you plan to use it. Our preferred capsule option is DoNotAge Pure TMG, rated 5/5 in our editorial review. Its appeal is a straightforward 500 mg capsule, a plant-based shell and a choice of pack sizes.

Commercial relationship: Biohack Blueprint is a DoNotAge affiliate and can earn commission from qualifying purchases. Our top capsule choice reflects the criteria below. It is not a claim that this product is the lowest-priced option or has superior clinical outcomes to every other TMG product.

How we compare TMG products

1. Correct form: betaine anhydrous rather than an HCl digestive product.
2. Clear amount: milligrams per capsule or tablet, and the full serving.
3. Formula: active ingredients and the capsule or tablet ingredients.
4. Practical format: fixed units, measurement needs and pack choice.
5. Documentation and value: what testing information is available and what an equal amount costs.

These are shopping criteria. Clinical evidence still needs to match the goal. A well-labeled capsule cannot establish an unproven anti-aging claim, and a 415-publication library is not 415 trials of one brand’s retail product.

1. DoNotAge Pure TMG: our preferred capsule option

Each capsule provides 500 mg of trimethylglycine. The manufacturer lists a 1,000 mg daily serving and describes TMG inside a hypromellose vegetable capsule, without additional active ingredients. One-time packs contain 60 or 366 capsules.

This is convenient if you prefer a fixed unit rather than weighing powder. The smaller pack offers a shorter initial purchase, while the larger pack reduces the cost per gram within this product’s range. At the listed two-capsule serving, the packs last 30 and 183 days respectively.

DoNotAge says it conducts in-house and third-party testing and makes certificates available on request. We have assessed the label and research, rather than independently testing a current retail lot. See the full Pure TMG review for the rating basis, regional prices and questions to ask about documentation.

Who should choose a different option?

Our preferred capsule is not automatically the best purchase for every constraint. DoNotAge’s 500 mg units suit people who value a plain single-active capsule and flexible unit counting. A powder can be more economical per gram, while a larger tablet can reduce the number of units at some comparison amounts. The actual formula, serving and swallowing/measuring preferences still matter.

Your priority	What may fit	Trade-off to examine
Plain capsule and 500 mg units	DoNotAge Pure TMG	Convenience comes at a higher cost per gram than bulk powder
Lower upfront cost for a small capsule pack	Compare the listed Life Extension option	Check the capsule vehicle and the total grams, not just the bottle price
More active ingredient in each unit	Compare the NOW 1,000 mg tablet	A tablet’s size and excipients can affect preference; the label serving is three tablets
Lowest ingredient cost per gram among this shortlist	Compare the listed BulkSupplements powder	Weighing, storage and handling replace fixed capsule units
A B-vitamin complex	Assess the entire formula separately	Additional ingredients are not automatically useful, and change both exposure and the evidence comparison

This shortlist compares actual formats and labels rather than claiming that one brand has proven superior clinical effects. We have not independently assayed the current retail lots or conducted a head-to-head trial of these products. Manufacturer testing statements are identified as such.

Other anhydrous TMG formats to compare

Product	TMG amount	Format and pack	Formula detail
DoNotAge Pure TMG	500 mg per capsule; 1,000 mg listed daily serving	60 or 366 capsules	TMG in a vegetable-cellulose capsule, per manufacturer
Life Extension TMG	500 mg per capsule; 1,000 mg per two-capsule serving	60 liquid vegetarian capsules	Also lists glycerin, vegetable cellulose and purified water
NOW TMG Betaine	1,000 mg per tablet; 3,000 mg per three-tablet facts-panel serving	100 tablets	Lists tablet binders, coating and other excipients
BulkSupplements Betaine Anhydrous	Weigh the actual powder amount	Powder; multiple pack sizes, including 500 g	Powder listing states no additives; check the selected variant’s label

Different excipients do not automatically mean that one product is unsafe or ineffective. The purpose of the comparison is to show what you are buying. For NOW, a 1,000 mg tablet and a three-tablet facts-panel serving are different numbers; neither should be mistaken for a universal dose recommendation.

Compare price per gram, not just price per bottle

The following are displayed US one-time prices checked on 18 October 2026, before shipping, tax or discounts. They are a dated snapshot, not a guaranteed checkout quote.

Selected pack	Displayed price	Total TMG	Approximate price per gram
DoNotAge, 60 × 500 mg	US$20.00	30 g	US$0.67
DoNotAge, 366 × 500 mg	US$95.00	183 g	US$0.52
Life Extension, 60 × 500 mg	US$10.13	30 g	US$0.34
NOW, 100 × 1,000 mg	US$27.99	100 g	US$0.28
BulkSupplements, 500 g powder	US$24.97	500 g	US$0.05

The calculation is pack price ÷ total grams. For a capsule example, 60 × 500 mg ÷ 1,000 = 30 g. Powder can be economical per gram; capsules trade that measurement step for fixed units. Our preferred capsule selection therefore includes convenience and formula preferences, not only the lowest price.

Subscriptions, member prices and promotional bundles have different terms. Reader code BB10 offers 10% off eligible DoNotAge orders; confirm the displayed discount and any stacking restrictions at checkout.

Pack duration and equal-dose value

For DoNotAge, 60 capsules contain 30 g TMG in total and 366 capsules contain 183 g. At the product page’s two-capsule daily serving, those are 30 and 183 days. At one capsule per day, the larger pack lasts 366 days—but that is a different daily amount. A “year’s supply” label should always be read with its serving assumption.

Pack	Total TMG	Duration at two capsules/day	US one-time cost per 1 g
DoNotAge 60 × 500 mg	30 g	30 days	About $0.67, from $20 ÷ 30 g
DoNotAge 366 × 500 mg	183 g	183 days	About $0.52, from $95 ÷ 183 g

Prices were checked on 18 October 2026, before shipping, tax, reader discounts or subscription terms. The calculation compares the same gram of ingredient; it does not prescribe a one-gram dose. The BB10 code may reduce eligible orders, with final terms confirmed at checkout.

A quick calculation for any TMG product

Total grams = units × milligrams of active TMG per unit ÷ 1,000. Divide the comparable bottle price by that total for cost per gram. For powder, use the actual net weight of the selected variant. Then add delivery costs and consider how much of the pack you realistically expect to use before expiry.

For example, a 100-tablet product at 1,000 mg per tablet contains 100 g. A 60-capsule product at 500 mg contains 30 g. The tablet bottle has more than three times as much TMG even though the unit counts do not look dramatically different. Equal-dose comparison prevents capsule count and bottle price from pulling the decision in different directions.

US, UK and Canadian shopping context

DoNotAge’s regional listings showed the following one-time prices when checked: US$20/95, £16/76 and CA$29/136 for the 60/366-capsule packs. The site offers US, UK and Canadian storefront selections. Confirm delivery availability, tax and the final landed cost for your address at checkout.

NOW also maintains a separate Canadian product page. A US facts panel and a Canadian product listing may use different directions, so buy against the label for your market. For other brands, verify the selected retailer, destination and delivery charge rather than assuming the US page is your local checkout.

Capsules, tablets or powder?

Capsules make the unit amount easy to count. A 500 mg unit allows different arithmetic from a 1,000 mg tablet, although that flexibility does not justify exceeding the directions. Tablets can provide a larger amount per unit but include formulation ingredients for manufacture and stability. Powder allows weighed amounts and can reduce cost per gram, but requires an appropriate scale.

There is no established general outcome advantage of a capsule simply because it looks premium, or of a powder simply because it dissolves. Compare the actual compound and amount first.

What should a certificate of analysis tell you?

A useful document identifies the product or ingredient, the lot, the laboratory, the test date and the methods or results. Identity, potency and contamination are separate questions. A certificate for NMN does not verify a TMG lot, and a claim of manufacturing certification is not itself a finished-product assay.

Our review describes the manufacturer’s stated testing access without implying that Biohack Blueprint independently assayed the product. Request the current document if that information matters to your purchase.

What a useful lot document should resolve

Look for a batch identifier that matches the product, the tested material, the test date, the laboratory, identity/assay methods and appropriate contaminant results with units and limits. A generic marketing certificate or a raw-material sheet may not answer the same question as a finished-product lot report.

A “99% purity” statement is not a complete safety assessment, and neither “third-party tested” nor “pharmaceutical grade” establishes clinical superiority. If independent sport certification matters to you, verify the exact product in the certifier’s current database rather than assuming that a brand’s other certified products cover its TMG.

DoNotAge says certificates are available on request. That is a useful route to ask questions, but our review does not claim that we obtained and independently verified the current lot’s laboratory report.

Why the first-ranked option is not simply the cheapest gram

DoNotAge Pure TMG earns our first position for the stated capsule use case: a single active ingredient, 500 mg units, a vegan capsule and clear smaller- or larger-pack choices. A bulk powder can cost less per gram while requiring weighing and handling. A 1,000 mg tablet can reduce unit count while changing tablet size and excipients. Those are real preferences, rather than evidence that a cheaper or larger unit works better clinically.

The manufacturer’s testing policy is useful information, but a current lot certificate answers a more specific question. Match the lot, assay and analytes before describing a product as independently verified. Our 5/5 review is a label-and-evidence assessment, not a claim of an independent batch assay or a customer-rating average.

For clinical claims, return to the ingredient evidence: TMG can lower homocysteine, but no capsule brand is established by those studies as preventing cardiovascular events or extending life. Product execution and clinical-outcome certainty remain separate parts of the buying decision. ^{[1] [2]}

Which choice fits your goal?

For our preferred plain capsule, start with the DoNotAge Pure TMG review. If you are weighing formats primarily on price, use the equal-gram calculation above. Before selecting an amount, read the dose guide and the safety guide.

Primary product sources: DoNotAge; Life Extension; NOW US; NOW Canada; BulkSupplements. For ingredient evidence, see the TMG Data Center.

Sources and next steps

Browse the complete 415-publication TMG Data Center for the original studies, methods, disclosures and limitations. The numbered references below identify the sources used for this article; the full library also retains supporting and null evidence.

Continue by question: TMG Supplement: Benefits, Dosage, Safety and Research · TMG Dosage Guide: Study Doses and Capsule Calculations · TMG Side Effects: Cholesterol, Digestion and Safety · Betaine Anhydrous vs Betaine HCl: Which Form Is TMG?.

Our recommended TMG product

DoNotAge Pure TMG — 5/5 editorial rating

Our first choice for a straightforward single-active capsule: 500 mg TMG per capsule, a vegan capsule and 60 or 366 capsules. The score assesses the formula, label clarity and practical product choice; clinical evidence is judged separately.

Read the full evidence-led review · View at DoNotAge. Use BB10 for 10% off eligible standalone products; confirm current checkout terms.

Affiliate disclosure: Biohack Blueprint may earn a commission from qualifying purchases. This is a desk-based editorial recommendation, not an independent batch assay or a promise of a health outcome.