Label snapshot
What the product contains and what one serving costs, according to our catalog. Label amounts are not personal dose recommendations.
| Ingredient | Amount per serving |
|---|---|
| Betaine (TMG) | 1,000 mg |
Amounts are per label serving as recorded in the catalog and are not a recommendation. Testing status reflects what the brand lists. Nothing here is medical advice.
These calculations describe our scoring method. They are not a recommended dose or proof of benefit from this product.
Public lab certificate, tested by independent lab, top 12% value.
Read the full evidence vaultEvidence gates dose: the evidence grade sets the ceiling, and the dose decides how much of that ceiling the product reaches. Value = inverse of price-per-trial-dose-day. Community = mean sentiment of external reviews. Safety caps applied after weighting.
This score is our editorial judgment, not a scientific standard. We combine published evidence, dose, price, transparency, and consumer signals into one composite: this is our method, not a peer-reviewed clinical rating. A higher score means a product does better on the factors we weight, not that it is medically proven to work.
This Double Wood Supplements TMG Supplement (Trimethylglycine) scores 6.1, making it below the site average. It delivers 1000mg of Betaine (TMG), 66% of the studied range low edge (1500mg) with grade C evidence (mostly preclinical, limited human data). Transparency is a clear strength (score: 9.0), with third-party testing and a public lab certificate.
The science behind each active ingredient, independent of which brand sells it.
A methyl donor added to NAD+ formulas as a supporting cofactor, not a headline active.
The specific product: dose, price, transparency, and what buyers report.
Safety flags, transparency gaps, dosing concerns, and recurring buyer complaints.
The main ingredients of this product, in plain language.
A methyl donor added to NAD+ formulas as a supporting cofactor, not a headline active.
Read about Betaine (TMG) →Hard numbers and independently checked status. Expand each block for its source.
All product data is checked against original sources. Prices, doses, and testing status are updated when product pages change. Evidence grades are reviewed when new human RCTs are published. Read how we verify.
3.5 out of 5 across 169 verified reviews on 4 platforms.
Medium confidenceConsumer sentiment compiled from 4 public sources.
169 reviews · 3.5/5 · mixed sentiment
Double Wood's brand-wide Trustpilot rating remains average due to recurring service issues.
Compiled from Trustpilot listing located during research; verified at build time.
positive sentiment
Amazon customers appreciate the value, quality, and effectiveness of this TMG supplement.
Compiled from Amazon listing located during research; verified at build time.
positive sentiment
Not verified as available on iHerb; brand's related methylated multivitamin product gets positive customer feedback.
Compiled from iHerb listing located during research; verified at build time.
negative sentiment
Reddit sentiment toward Double Wood as a brand is notably negative due to service complaints, even though individual product reviews are often positive.
Compiled from Reddit listing located during research; verified at build time.
These are consumer sentiment signals. They do not measure whether the product actually works. See our evidence section for that.
No external reviews aggregated yet for this product.
Published evidence, claim checks, regulatory status and what could not be verified.
No landmark studies linked yet. See the ingredient pages for the full evidence breakdown.
Frequently backordered/unavailable (was listed as backordered at time of check). Label serving (1000mg) is well below the 3000mg dose the vendor's own marketing cites for homocysteine reduction, would require 3x the recommended serving to hit the cited trial dose.
If you are the manufacturer or brand owner of TMG Supplement (Trimethylglycine) and believe any data on this page is incorrect (wrong dose, wrong ingredient, wrong price, missing certification, outdated status), you can request a correction.
We review every request, verify it against primary sources, and publish any accepted change with a dated note. Corrections from brand owners are treated the same as corrections from anyone else: verified before they move.
Request a correction →The next highest-scoring products in Methyl donor, same scoring method, same rules.
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Double Wood SupplementsStatus as recorded in the catalog from brand materials; not independently verified by NO1GEVITY.
Editorial score, not proof that this product works. Research-dose calculations are not dosing advice.
Double Wood SupplementsStatus as recorded in the catalog from brand materials; not independently verified by NO1GEVITY.
Editorial score, not proof that this product works. Research-dose calculations are not dosing advice.
Double Wood SupplementsStatus as recorded in the catalog from brand materials; not independently verified by NO1GEVITY.
Editorial score, not proof that this product works. Research-dose calculations are not dosing advice.
Double Wood SupplementsStatus as recorded in the catalog from brand materials; not independently verified by NO1GEVITY.
Editorial score, not proof that this product works. Research-dose calculations are not dosing advice.