← Alla produkter

Glycine Supplement

Amino acid · Capsule · 120 portioner#6 / 11 in Amino acid
6.4
Overall score · out of 10
6.4
Overall score · out of 10
Dose vs. studies5.1
Transparency9.0
Value9.4
Community6.0
Formulation5.0
Tier 4
Ingredient RCT (different dose)
The ingredient was tested in an RCT but at a different dose, or only in animals.
Redaktionellt score, paid $0 No affiliate link Tested by independent lab Public analysintyg Sample received: No
How we scored this product Show the full breakdown
Composite How this 6.4 is built. 0.55 × 5.1 + 0.20 × 9.0 + 0.10 × 9.4 + 0.10 × 6.0 + 0.05 × 5.0 = 6.4 out of 10. Säkerhet caps applied after. 6.4
6.4 composite
Dose vs. studies55%5.1
Transparency20%9.0
Value10%9.4
Community10%6.0
Formulation5%5.0

Bevisning 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. Säkerhet 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.

Read the full method →

Question 1

Does the molecule work?

The science behind each active ingredient, independent of which brand sells it.

Cheap amino acid with better sleep and glutathione-precursor benefits.

1 landmark RCT · US: Dietary supplement / GRAS · EU: Food supplement
Question 2

Is this bottle good?

The specific product: dose, price, transparency, and what buyers report.

Dose vs research
33% av studiedosen
Well below the trial dose
Cost at trial dose
$0.50/day at trial dose
What one effective daily dose actually costs
Transparency
9.0/10 · Public analysintyg (quality: not assessed)
Independent batch testing confirmed
Consumer signals
169 reviews across platforms · 3.8/5 · medium confidence
Operational signal only, never used as clinical evidence
Question 3

What's the catch?

Säkerhet flags, transparency gaps, dosing concerns, and recurring buyer complaints.

Underdosed
Dose at 33% av studiedosen
Below 50% of the dose used in published clinical trials.
Buyer complaints
Amazon: Some capsules include fillers; Trustpilot: Product consistency concerns
Recurring themes from consumer review platforms.
Redaktionellt verdict

Quick verdict

6.4 / 10
Best for
Public analysintyg, Budget-friendly
Avoid if
Only 33% av studiedosen
Full-dose status
33% av studiedosen
Pris/month
$5
COA status
Public
Biggest caveat
Dose is 33% of the trial dose.
Nearest alternatives

The numbers

Pris
$20
per bottle · 120 portioner
Dose vs. research
Below trial dose 33%
of published effective dose
$ / day at studied dose
$0.50
what one effective daily dose costs
$ / g active
$0.17
per gram of active substance
Independently checked

Data verification

Pris
$20
Verified n/a
Dose
33% av studiedosen
Verified n/a
COA status
Public
Verified n/a
Bevisning grade
B
Per-ingredient breakdown
BGlycine
Verified n/a

All product data is checked against original sources. Prices, doses, and testing status are updated when product pages change. Bevisning grades are reviewed when new human RCTs are published. Read how we verify.

What's inside

Ingredient
Dose in this product
Trial dose
Bevisning
Glycine
Cheap amino acid with better sleep and glutathione-precursor benefits.
1000.0 mg 33% av studiedosen
3000 mg
3.8 /5
High confidence
169 reviews across 3 platforms (3 sources)
Source diversity: 69%
AmazonRedditTrustpilot
PraiseGood quality and valueEffective for sleep/relaxation
ComplaintsSome capsules include fillersProduct consistency concerns
Last checked: 2026-08-07

Consumer signals

3.8 out of 5 across 169 verified reviews on 3 platforms.

Medium confidence

Consumer sentiment compiled from 3 public sources.

positive sentiment

PraiseGood quality and valueEffective for sleep/relaxation
ComplaintsSome capsules include fillers
ThemesAmazon reviewers report good value and effectiveness for relaxation, though a few note added fillers in capsules.

Compiled from Amazon listing located during research; verified at build time.

169 reviews · 3.8/5 · mixed sentiment

PraiseResponsive customer service
ComplaintsProduct consistency concerns
ThemesDouble Wood Supplements' company-wide Trustpilot rating is a mixed 3.8/5 from 169 reviews.

Compiled from Trustpilot listing located during research; verified at build time.

2 threads discussed · mixed sentiment

PraiseAffordable pricing
ComplaintsVarumärke reliability concerns raised broadly
ThemesReddit's r/Supplements has repeated threads questioning Double Wood Supplements' overall product reliability across its catalog.

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.

What others say (unverified)

No external reviews aggregated yet for this product.

Bevisning

Research behind this product

The studies that established the trial dose and evidence grade for each active ingredient in this product. Click through to read the original paper.

Important to know
GlycineNone major. Very sweet in powder form, mix in water or coffee.

Redaktionellt notes

Large 240-capsule bottle at budget pricing. Flexible dosing guidance (1000-2000mg standard, up to 5000mg) covers both sleep-support and general amino-acid supplementation use cases.

In plain language

Why this scored this way

This Double Wood Supplements Glycine Supplement scores 6.4, making it below the site average. It contains 1000.0mg of Glycine, which is only 33% of the 3000mg trial dose with grade B evidence (promising human data, not yet comprehensive). Transparency is a clear strength (score: 9.0), with third-party testing and a public analysintyg.

What drives the score up

  • Quality transparency of 9.0: tested by independent lab with a public analysintyg.

What drags it down

  • Dose-evidence score of 5.1 is below average for the site.
  • Overall dose is only 33% of the trial dose across ingredients.
  • Glycine (1000.0mg is 33% of the 3000mg trial dose) is significantly under-dosed.
  • Limited consumer feedback (community score: 6.0).

Why you'd choose it

  • You want good value at $0.50/day.
  • You want Glycine from a Double Wood Supplements product.
  • You prioritise tested by independent lab produkter with public lab certificates.

Why you might skip it

  • You need a full trial dose of glycine (this product under-doses it).
  • You want a product that hits the full trial dose (this is at 33%).
  • You want a higher-scoring product (this scores 6.4).
Go deeper

Where this sits

Varumärke owners

Spot an error?

If you are the manufacturer or brand owner of Glycine Supplement 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 primär sources, and publish any change with a dated note in the version history above. Corrections from brand owners are treated the same as corrections from anyone else: verified before they move.

Request a correction →
Same shelf

Similar produkter

All Amino acid →

The next highest-scoring produkter in Amino acid, same scoring method, same rules.

Same maker

Other produkter from Double Wood Supplements

Varumärke profile →